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Giới Thiệu Về API Là Gì?

22/04/2022

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Giới Thiệu Về API

Xin chào các bạn, mình là Thắng, thành viên team QC của SupremeTech. Trong bài viết này, mình sẽ giải thích cho các bạn về một khái niệm rất quen thuộc trong kiểm thử nói riêng mà còn trong ngành IT nói chung, đó là API.

Mình nhớ khoảng thời gian đầu tiên khi mình bắt đầu nhận việc trong một dự án với yêu cầu chỉ có API; lúc đó mình còn chưa có đủ kiến thức và kinh nghiệm cùng với sự tự tin về mảng này. Có rất nhiều câu hỏi trong đầu mình như phải tìm hiểu thế nào? Kiểm thử ra sao? Và sau đó mình đã cố gắng học hỏi và thực hành rất nhiều, sau cùng mình nhận ra API không quá khó như lúc đầu mình nghĩ, ít nhất mình đã có được kinh nghiệm và kiến thức để tự tin áp dụng vào trong dự án.

Ở đây, mình sẽ chia sẻ lại cho các bạn những gì mình đã tìm hiểu, đã áp dụng vào thực tế, để mọi người có góc nhìn khác khi một tester nhìn vào API thì sẽ như thế nào nhé.

API là gì?

API là viết tắt của cụm từ Giao diện lập trình ứng dụng (Application Programming Interface). API cung cấp khả năng truy xuất đến một tập các hàm hay dùng. Và từ đó có thể trao đổi dữ liệu giữa các ứng dụng. Một cách dễ hiểu thì API là một trung gian phần mềm cho phép hai ứng dụng giao tiếp với nhau.

Ví dụ về API trong thực tế

Tưởng tượng bạn bước vào một nhà hàng, bạn đặt món, nhân viên phục vụ sẽ tiếp nhận yêu cầu của bạn và đưa vào nhà bếp, sau đó sẽ mang ra món ăn đúng với yêu cầu của bạn. Trong ví dụ trên, API là nhân viên phục vụ, đã giúp bạn và đầu bếp giao tiếp với nhau.

Bây giờ hãy nghĩ về một trường hợp ứng dụng API trong thực tế nhé. Giả sử bạn đi du lịch, bạn sẽ vào trang web của các hãng hàng không nhằm kiểm tra chuyến bay, giá cả, số ghế,… Nhưng vấn đề ở đây là có quá nhiều hãng hàng không và bạn lại không muốn mất thời gian cho những việc thế này, thay vào đó, bạn có thể sử dụng các dịch vụ trực tuyến trung gian nhiều tiện ích như Traveloka hay Expedia. Những dịch vụ đó sẽ tương tác với API của các hãng hàng không để hiển thị cho bạn các thông tin liên quan không chỉ của một mà còn của nhiều hãng bay khác nhau, từ đó giúp cho bạn tiết kiệm được rất nhiều gian và công sức. API thật tuyệt vời đúng không!

what is an API

HTML là gì?

Khoảng thời gian sau khi World Wide Web (WWW) được ra đời vào cuối những năm 1980, nhu cầu trao đổi dữ liệu giữa các thiết bị điện tử trở nên phát triển hơn bao giờ hết. Vào thời điểm đó, các tập tin siêu văn bản HTML được đưa lên web và người sử dụng có thể đọc được nội dung một cách dễ dàng.

HTML là viết tắt của từ HyperText Markup Language – Ngôn ngữ Đánh dấu Siêu văn bản. Đây là một loại ngôn ngữ nhằm định dạng trang web thông qua các thẻ (tag) nhằm giúp cho máy tính hiểu được bố cục và cấu trúc của trang web và hiển thị trang web đó. Tuy nhiên lập trình viên chỉ có thể sử dụng những tag được quy định sẵn trong HTML khiến cho việc mở rộng hay tạo ra những nội dung mới trên website khá khó khăn.

Một vấn đề khác nữa là HTML chỉ đơn thuần là ngôn ngữ trình bày nội dung, nó không có chức năng lưu trữ hay trao đổi dữ liệu giữa các máy tính với nhau, nghĩa là các hệ thống không thể tương tác với nhau như cập nhật giá cả hàng ngày chẳng hạn.

XML là gì?

Do đó XML – Extensible Markup Language được ra đời với sứ mệnh tạo ra các tài liệu web cho cả người và máy tính đều có thể dễ dàng đọc được, khiến Internet thực sự trở thành một mạng lưới liên kết đúng nghĩa thật sự. XML được phát triển bởi mười một người đóng góp tại W3C vào năm 1997.

XML, đúng như tên gọi của nó (Extensible – mở rộng), đã giải quyết được một vài vấn đề của HTML như thay vì sử dụng các tag có sẵn thì XML cho phép các lập trình viên tự tạo ra các tag của chính mình, từ đó cho phép họ thể hiện được nhiều nội dung hơn trên website, và đặc biệt là XML cho phép gói dữ liệu vào trong nội dung văn bản và trao đổi giữa các hệ thống với nhau.

Trước khi XML ra đời thì các hệ thống vẫn có thể trao đổi dữ liệu với nhau nhưng đó là một quy trình rất phức tạp và phải thống nhất rất nhiều quy tắc, dẫn tới việc nếu trao đổi dữ liệu lớn thì sẽ xảy ra tình trạng bị mất dữ liệu trong lúc chuyển đổi. Với XML, lập trình viên có thể khai báo trước các tag của mình và các hệ thống đều có thể đọc được và tương tác với nhau dễ dàng hơn.

Mình sẽ lấy một ví dụ đơn giản cho bạn dễ hiểu nhé. Trong HTML có một thẻ tag là <title> nhằm khai báo tiêu đề trang web. Cấu trúc sẽ như thế này:

<!DOCTYPE html>
<html>
  <head>
    <title>Supremetech blog</title>
  </head>
  <body>
  </body>
</html>

Trong khi đó, với XML bạn có thể tự khai báo thẻ tag <title> với nhiều mục đích khác nhau như tiêu đề trang web và tiêu đề một quyển sách hiển thị trên trang web đó mà không lo bị lỗi:

<?xml version="1.0" encoding="UTF-8"?>
<page>
  <head>
     <title>Book store</title>
  </head>
  <body>
    <library>
      <book>
        <title>Harry Potter</title>
        <author>J.K Rowling</author>
      </book>
      <book>
        <title>Sherlock Holmes</title>
        <author>Conan Doyle</author>
      </book>
    </library>
  </body>
</page>

Các bạn có thể thấy thẻ tag <title> nằm trong thẻ <head> sẽ được máy tính hiểu là tiêu đề của trang, còn thẻ <title> nằm trong thẻ <book> sẽ được hiểu là tiêu đề của quyển sách.

SOAP và RESTful

Sau khi hiểu được API là gì, các bạn sẽ thấy API vô cùng quan trọng trong thời đại số như hiện nay. Và như một điều hiển nhiên, mọi thứ sau khi phát triển một thời gian sẽ hình thành những quy tắc chung. Sau đây mình sẽ giới thiệu 2 chuẩn phổ biến là SOAP là RESTful.

SOAP

Sau khi XML ra đời, một vài kỹ sư tại Microsoft đã phát triển SOAP. SOAP là một tiêu chuẩn dựa hoàn toàn vào XML để chuẩn hóa việc giao tiếp giữa server và thiết bị (client), từ đó giúp cho việc phát triển API tốt hơn. Sau khi SOAP xuất hiện, đặc biệt vào năm 2000, SOAP đã được Microsoft và IBM thúc đẩy và trở nên phổ biến. Một số công ty và các tập đoàn lớn đã sử dụng SOAP như HP hay Oracle cho các chương trình của họ.

Một vấn đề khá lớn của SOAP là có quá nhiều quy tắc phải tuân thủ khiến cho lập trình viên thấy nó quá khó để sử dụng. Mặc dù việc có nhiều quy tắc cũng là một ưu điểm của SOAP bởi vì nhờ đó các lập trình viên có thể tạo ra các hệ thống độc lập nhưng vẫn giao tiếp tốt với nhau. Từ khả năng giao tiếp tốt đó, các hệ thống lớn gồm nhiều hệ thống liên quan sẽ được quản lý và phát triển một cách dễ dàng hơn.

RESTful

Một nhà khoa học máy tính tên Roy Fielding đã nhìn ra vấn đề đó và giới thiệu tiêu chuẩn REST trong luận văn tiến sĩ của mình với mục đích duy nhất: tạo ra tiêu chuẩn giúp cho các server đều có thể giao tiếp được với nhau. Nếu như SOAP sử dụng XML để tạo request và response thì RESTful có thể tạo request với một URL đơn giản đi cùng với các phương thức (method) như GET, POST, PUT, DELETE và response trả về cũng được viết ở nhiều dạng như JSON hay CSV. Bạn hãy nhìn vào ví dụ dưới đây về request và response của API dùng để xem giá cả nếu được viết dưới dạng XML theo tiêu chuẩn SOAP:

  • Request
<?xml version="1.0"?>

<soap:Envelope
xmlns:soap="http://www.w3.org/2003/05/soap-envelope/"
soap:encodingStyle="http://www.w3.org/2003/05/soap-encoding">

<soap:Body>
  <m:GetPrice xmlns:m="https://www.w3schools.com/prices">
    <m:Item>Apples</m:Item>
  </m:GetPrice>
</soap:Body>

</soap:Envelope>
  • Response:
<?xml version="1.0"?>

<soap:Envelope
xmlns:soap="http://www.w3.org/2003/05/soap-envelope/"
soap:encodingStyle="http://www.w3.org/2003/05/soap-encoding">

<soap:Body>
  <m:GetPriceResponse xmlns:m="https://www.w3schools.com/prices">
    <m:Price>1.90</m:Price>
  </m:GetPriceResponse>
</soap:Body>

</soap:Envelope>

Source: W3C

Rất là rắc rối và phức tạp đúng không nào. Trong khi đó nếu ta cũng dùng API gọi thông tin về giá sản phẩm theo RESTful thì chỉ cần gửi request tới URL (https://www.w3schools.com/prices), chọn method là GET thì sẽ có response dưới dạng JSON như sau:

{
    "Apple": "1.90"
}

Nhìn vào API theo tiêu chuẩn RESTful bạn cũng nhận ra nó đơn giản và dễ dùng hơn SOAP đúng không? Đó là lí do mà vì sao RESTful được sử dụng rất nhiều vào ngày nay.

Một lí do khác là vào thời điểm những năm 2000, Internet phát triển cực kì mạnh mẽ, đặc biệt là mảng thương mại điện tử. Rất nhiều tập đoàn lớn lúc đó đã phát triển API của mình để nhiều bên có thể truy cập vào dữ liệu sản phẩm của họ. Lúc đó Salesforce là một trong những người tiên phong cung cấp API của mình dưới tiêu chuẩn SOAP nhưng lại không được nhiều lập trình viên ưa chuộng vì tài liệu hướng dẫn sử dụng hơn 400 trang.

Trong khi đó, Ebay, mặt khác lại cung cấp API theo chuẩn RESTful và đã đạt được sự thành công đáng kể so với đối thủ là Salesforce lúc bấy giờ khi mà nhiều bên cảm thấy API theo chuẩn RESTful dễ truy cập và dễ sử dụng. Kể từ đó là thời kì phát triển mạnh mẽ của RESTful API, nhiều ông lớn đã đi theo Ebay như Amazon, Flickr,… Dưới đây là sơ đồ thống kê mức độ phổ biến các chuẩn API vào năm 2014:

API

Source

Dưới góc độ kiểm thử và sự phổ biến của RESTful nên mình sẽ nói kỹ hơn về chuẩn này nhé.

RESTful API

Hình ví dụ ở trên minh họa một cách đơn giản về nguyên lý hoạt động của API theo tiêu chuẩn RESTful. Hãy lấy lại ví dụ ở phần trước đó về việc bạn sử dụng Traveloka để xem thông tin về chuyến bay nhé. Bạn vào mục tra cứu chuyến bay trên web Traveloka, sau bước này thì website – client sẽ gửi request theo giao thức HTTP tới server của hãng bay. Tùy thuộc vào phương thức – method bạn gửi thì server sẽ có những xử lý tương ứng. Trong RESTful sẽ có 4 phương thức cơ bản sau đây:

  • GET (SELECT): Trả về một Resource hoặc một danh sách Resource.
  • POST (CREATE): Tạo mới một Resource.
  • PUT (UPDATE): Cập nhật thông tin cho Resource.
  • DELETE (DELETE): Xoá một Resource.

Những phương thức hay hoạt động này thường được gọi là CRUD tương ứng với Create – Tạo, Read – Đọc, Update – Sửa, Delete – Xóa.

Ví dụ ở đây bạn muốn xem thông tin về chuyến bay thì method client dùng sẽ là GET nhằm lấy về danh sách các chuyến bay theo yêu cầu của bạn. Sau khi server nhận được request của Client sẽ tiến hành trả về dữ liệu phù hợp response. Dữ liệu trả về thường được viết dưới dạng JSON hoặc XML tùy thuộc vào tính chất của dự án. Dữ liệu trả về gồm có cấu trúc như sau (mình sẽ để dưới dạng JSON nhé):

{
    "status_code": 200,
    "data": [
        {
            "name": "LH370",
            "Time": "Mar 29, 2022",
            "City": "DNG"
        },
        {
            "name": "LH370",
            "Time": "Mar 29, 2022",
            "City": "HCM"
        }
    ],
}

Các bạn có thể thấy ở response có dòng “status_code”, biến này sẽ cho chúng ta biết được trạng thái của response trả về. Các mã sẽ được phân thành các nhóm như sau:

  • 2xx: Successful responses / Phản hồi thành công:
  • 200 OK – Trả về thành công cho những phương thức GET, PUT, PATCH hoặc DELETE.
  • 201 Created – Trả về khi một Resource vừa được tạo thành công.
  • 204 No Content – Trả về khi Resource xoá thành công.
  • 3xx: Redirects / Điều hướng
  • 304 Not Modified – Client có thể sử dụng dữ liệu cache.
  • 4xx: Client errors / Lỗi phía client
  • 400 Bad Request – Request không hợp lệ
  • 401 Unauthorized – Request cần có auth.
  • 403 Forbidden – bị từ chối không cho phép.
  • 404 Not Found – Không tìm thấy resource từ URL
  • 5xx: Server errors / Lỗi phía máy chủ
  • 500 Server Error: domain, hosting hết hạn, hoặc dừng server đột ngột để test
  • 502 Bad Gateway
  • 503 Service Unavailable

Web services là gì? Phân biệt API và web services

Và lúc này khái niệm web services trở nên phổ biến. Giờ chúng ta tìm hiểu thêm một khái niệm mới nhé.

Nói một cách khái quát, web services là những tài nguyên có sẵn trên internet, là dịch vụ cung cấp một số chức năng mà các ứng dụng khác có thể sử dụng. Chức năng này có thể bao gồm xử lý thanh toán, đăng nhập và lưu trữ cơ sở dữ liệu. Cả API và web services đều đóng vai trò giúp cho các ứng dụng giao tiếp được với nhau. Điểm khác biệt cơ bản giữa API và web services đó là web services giúp các ứng dụng giao tiếp với nhau trên Internet nhưng API có thể giúp các ứng dụng giao tiếp với nhau mà không cần Internet. Chúng ta có thể nói tất cả web services là API nhưng không phải API nào cũng là web services.

Hơi rắc rối đúng không nào, mình sẽ lấy một ví dụ cho bạn dễ hình dung nhé:

Hầu như trong cuộc sống ngày nay chúng ta luôn có sẵn ứng dụng Facebook trên điện thoại của mình. Khi bạn bắt gặp một khoảnh khắc nào đó và muốn chụp một bức hình để chia sẻ cho bạn bè cũng xem, bạn sẽ bấm vào biểu tượng máy ảnh trên Facebook và nó sẽ mở màn hình chụp ảnh cho bạn. Lúc này Facebook sẽ gọi API máy ảnh của điện thoại để sử dụng máy ảnh ngay trên ứng dụng mà không cần phải mở app chụp ảnh mặc định của điện thoại, và việc gọi API này thì không cần mạng. Ở một trường hợp khác, khi bạn vào xem thông tin một địa điểm nào đó trên Facebook thì sẽ thấy bản đồ chỉ đường tới địa điểm đó đúng không? Lúc đó Facebook sẽ gọi API (web services) từ Google Map để lấy thông tin bản đồ về và thao tác này chắc chắn cần mạng mới có thể làm được.

Cho tới hiện tại, việc tranh cãi SOAP hay RESTful tốt hơn vẫn chưa hề kết thúc. Tùy thuộc vào tính chất của dự án và sở thích của lập trình viên mà chúng ta sẽ lựa chọn chuẩn phù hợp. SOAP có thể phức tạp, phải tuân thủ nhiều quy tắc nhưng đôi khi nó lại dễ sử dụng trong một số trường hợp, còn đàn em của nó là RESTful nổi lên như một giải pháp thay thế mới mẻ song vẫn có những vấn đề của riêng nó.

Bài viết giới thiệu về API của mình đến đây là hết, mình rất vui vì một phần nào đó đã giúp các bạn có thêm những kiến thức mới. API theo chuẩn RESTful rất phổ biến, do đó kĩ năng kiểm thử API theo chuẩn này rất cần thiết với tester. Những bài viết tiếp theo mình sẽ giới thiệu cho các bạn về những công cụ thường được sử dụng trong việc test API như Postman, Charles,… Hẹn gặp lại các bạn lần sau!

Reference

  • W3schools (no date) W3schools.com, W3Schools Online Web Tutorials. Available at: https://www.w3schools.com/xml/xml_soap.asp (Accessed: 04 October 2024).
  • Jay (2023) Soap and rest at odds, The History of the Web. Available at: https://thehistoryoftheweb.com/soap-rest-odds/ (Accessed: 04 October 2024).
  • Harrington, D. (2024) The history of rest apis – readme: Resource library, ReadMe. Available at: https://readme.com/resources/the-history-of-rest-apis (Accessed: 04 October 2024).

Author: Thang Tran

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    Japan – A journey of connection, learning, and cultural exploration

    From November 11 to 17, 2024, the SupremeTech team traveled to Japan with three main goals in mind: To explore and learn from Japanese corporate cultureTo visit and work with key clients: This included a visit to Classmethod (CM) and on-site discussions with one of the major clients involved in a key project at our companyTo attend Inter BEE, one of Japan’s leading tech events. The exhibition brought together cutting-edge trends in broadcasting, content creation, and digital entertainment — a must-see for anyone in the industry. Beyond the professional takeaways, the business trip gave us a deeper glimpse into how the Japanese work, connect with others, and shape their distinctive workplace culture. Detailed Agenda Time: 11/11/2024 – 17/11/2024 Location: Tokyo – Chiba, Nhật Bản DateMain activities10/11Travel from Vietnam to Tokyo11/11Work at Classmethod’s office & visit the client site12/11Continue working at Classmethod’s office13/11Attend Inter BEE 2024 in Chiba14~15/11Remote work from hotel: content wrap-up and business trip report preparation16/11Weekend break – Explore Hakone, enjoy hot springs, and the beauty of the Japanese landscape17/11Return to Vietnam Unforgettable Moments & Highlights Office day at Classmethod & client meeting for the project First Two Days: At Classmethod’s Tokyo Office Our first two days were spent working at Classmethod’s office, located on the 26th floor of Hibiya Tower — right in the heart of Tokyo. From up there, we were treated to a sweeping view of Tokyo Tower, and even caught a glimpse of Tokyo Skytree in the distance — a truly breathtaking sight that had us all pausing in awe. The office is thoughtfully designed, with a variety of modern, functional spaces: Cafeteria area: An open, friendly space where people can grab tea or coffee, chat freely, or even get some work done. One particularly charming detail was the “souvenir corner”, where employees leave small gifts or local specialties from their business trips — a fun and meaningful way to share experiences with colleagues.Meeting zone: Equipped with both group meeting rooms and private booths, this area supports a range of activities, from team discussions to quiet, focused work.Internal workspace: A spacious, quiet area reserved for employees — ideal for deep concentration. In the afternoon of our first day, we headed out with Classmethod’s team to visit one of their key clients. We attended a vendor meeting, met the stakeholders in person, and gained a much clearer picture of how our collaboration might evolve in the future. It was a solid start and just the right dose of excitement for the first day. Discovering Japanese Work Culture at Classmethod’s Office Flexible and Respectful Work Environment:The office features an open layout with minimal physical barriers but is smartly designed to maintain focus (e.g., personal booths and small meeting rooms). Everyone is encouraged to choose the work arrangement that best suits them.A Culture of Sharing and Internal Bonding:One great example is the “お土産 (omiyage)” corner in the cafeteria — a small but meaningful tradition of sharing. Boxes of sweets and gifts from different regions aren’t just snacks; they’re little stories passed around naturally among colleagues, building bonds and sparking conversations.Focus on Health and Comfort:Free tea and coffee are always available, and there are cozy spots throughout the communal area where you can take breaks and relax. This thoughtful care helps everyone recharge and stay creative throughout the workday. We truly felt that this is a workplace where people are respected, connections are encouraged, and productivity doesn’t come from pressure but from a spirit of initiative and mutual support. Meeting the Vendors Collaborating on the Project At the Vendor Meeting, we were warmly welcomed with coffee and pastries — a perfect example of “omotenashi,” the Japanese spirit of hospitality. When I introduced myself as being from Vietnam, everyone was pleasantly surprised and delighted, which created a friendly and warm atmosphere right from the start. Through the meeting, we not only got to know our partners better but also clearly felt how important personal communication is in technical collaboration — something that online meetings sometimes struggle to capture. Memorable Moments Beyond Work:  A Fun Visit to a Major Restaurant Chain (Day 2) On the morning of Day 2, before heading to the office, we stopped for breakfast at a restaurant that’s part of a well-known chain — and interestingly, also a client in our current project for a takeout ordering system. The menu was huge. It took us a while to finally decide on our breakfast picks. The restaurant had adorable cat-shaped serving robots with expressive digital faces, but our table was actually served by a real staff member (still cute, though!). Even though it was just a quick breakfast, being in the actual space where our product is used gave me a much clearer sense of the customer’s needs. It was a small but meaningful reminder of why we build what we build. Attending the Inter BEE event Inter BEE is Japan’s biggest tech exhibition dedicated to broadcasting, video, audio, and communications. It’s where major players like Panasonic, Sony, and Hitachi showcase cutting-edge technologies alongside smaller companies offering innovative tools, from video editing software and specialized storage devices to creative graphic design solutions. Some of the standout trends we saw at the event included: AI-powered content production4K/8K broadcasting and cloud-based transmission solutionsNew VR/AR applications in entertainment Impressive Moments from Inter BEE Attending Inter BEE was a completely new experience for me, not just because of its massive scale, but also thanks to the level of professionalism and precision in every detail of the event. Our Company’s Activities at the Event: Our team, in collaboration with our partner Enlyt, set up a booth to showcase CloudTV (internally known as OTTclouds) — a cloud broadcasting platform currently being developed and deployed for the Japanese market.While Mr. Hoang, the project lead, was busy welcoming visitors at the booth, I had the chance to explore the entire exhibition and dive into the latest technologies in the industry. A Few Highlights That Stood Out:  Flawless “Japanese-style” organization:From the booth layout and clear navigation signs to helpful staff everywhere, everything was organized with incredible logic and clarity. Despite the venue's size, finding our way around was surprisingly easy.High-quality tech booths: Every exhibitor put real effort into both content and presentation. The booths were visually impressive, filled with interactive demos and staff who were well-trained. Some even let visitors try out cutting-edge technology, such as VR gear or TV production systems, right on the spot.An authentic feeling for the broadcast-media world:For the first time, the TV and broadcast industry felt tangible to me — no longer distant or abstract. Seeing massive cameras, complex post-production setups, and live demos of AI dubbing or audio processing gave me a whole new appreciation for what happens behind the scenes of every show we watch.Learning through conversations:Beyond just looking around, I also had the chance to chat briefly with staff from a few booths. Even though I couldn’t catch every technical term, those exchanges were incredibly meaningful — a reminder of how valuable honest, human-to-human knowledge sharing can be. What I’m Taking Home from the Business Trip Our business trip to Japan brought so many meaningful takeaways — not just for me, but for the whole team: We got to see firsthand the meticulousness, warm hospitality, and thoughtful spirit of sharing that define how Japanese companies operate.From meaningful conversations to in-person meetings, we deepened our connections, especially with strategic clients involved in our company’s flagship projects.Inter BEE provided us with a front-row seat to the latest developments in broadcasting and digital entertainment — from AI-powered tools to immersive media solutions. This Japan business trip wasn’t just about understanding our clients or getting updates on current projects — it was also a rare chance to immerse ourselves in Japanese corporate culture, learn from how events are run, and truly feel the professionalism that drives the way people work in Japan. We’re hopeful that this won’t be the last time. Here’s to more chances in the future to reconnect, learn, and grow together. Snapshots from the Business Trip More snapshots from the Classmethod office and our client visit  A cozy space that doubles as a cafeteria and a free-seating work area Poster of the football team that Classmethod sponsors Instructions for staff on how to order food in the cafeteria View of the park from one of the meeting rooms Meeting with Classmethod team members from the project we're collaborating on The client team member prepared a slide showcasing different types of sweets for everyone to choose and try during the meeting. Some photos from the Inter BEE event

    11/06/2025

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    Ngan Vo T. T.

    Our success stories

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      Japan – A journey of connection, learning, and cultural exploration

      11/06/2025

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      Ngan Vo T. T.

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        Enterprise-level AWS migration for a Global Luxury Jewelry Brand

        SupremeTech is now working closely with a globally recognized luxury jewelry retailer to migrate the LINE MINI App system from a “stand-alone” infrastructure to a globally managed AWS organization without disrupting operations or compromising brand quality.  In this project, the SupremeTech team has navigated complex integrations, multi-regional coordination, and a highly-layered digital ecosystem. Through product-focused execution, proactive risk management, and strategic alignment, the team delivered the system migration successfully without service disruption. A Glimpse Inside a Brand’s Operations As a luxury brand with a long-standing heritage, our client operates in a highly complex environment where every decision is carefully reviewed across multiple layers of management. Balancing this thoughtful, legacy-driven approach with the fast pace of modern technology is no small feat. The brand operates in a complex environment. Every move has to be carefully thought through by a great number of decision-making layers. The nature of technology is modern and fast-changing, which generally contradicts what the legacy brand is reputed for.  Nonetheless, luxury brands are born to be the most exquisite trendsetters of the world, so even when it comes to digital transformation, people expect no less than perfection. There's no room for disruption, no margin for error, and every change must align with the brand’s exceptional standards. Here’s what makes the system migration so complex: Global operations mixed with unique brand expectations in each marketExtremely high customer expectations, both in-store and onlineCoordinating across internal teams, regions, and business unitsAdhering to varying regulations within the system migration Challenges from Infrastructure migration for A Complex System  SupremeTech was engaged to develop a LINE MINI App for event registration during Q3–Q4 2024. Previously, the app operated independently, but the goal was to connect it with the brand’s internal infrastructure to enable seamless data flow, enhance cost tracking, and ensure consistent operations across teams. Technical Challenges 1. Steep Learning Curve Although we have a lot of experience with AWS services, diving into enterprise-level solutions introduced new challenges. It is still a significant hurdle for our team to learn, effectively use, and master tools like Kubernetes deployment, Datadog, and Argo CD within just a few weeks. With only two tech members, each of us had to upskill and take ownership quickly. For 3–4 months, we balanced daytime implementation and communication with the enterprise support team while spending nights learning the tool to tackle the project's growth. 2. Infrastructure Integration Another major challenge was migrating our application’s infrastructure with the enterprise’s complex existing systems. While we had a confirmed workflow and support from the enterprise team, translating that into working code proved more difficult than expected.  One example was setting up a proxy for application security—a critical component that introduced unexpected problems. This was also the first time a third-party vendor’s app was being migrated into the enterprise environment, so there was no clear blueprint. We gradually uncovered hidden requirements, such as additional permissions and configuration access, revealing just how much more we needed to understand the system’s inner workings. Project Management Hurdles 1. Adapting to Multi-Layer Entrepreneurial Ecosystems The client’s operations were not only large but also multi-dimensional, with several entrepreneurial arms. SupremeTech had to understand this complex structure and build systems that supported flexibility rather than fixed processes. Communication across many divisions within the client’s multinational operations team was another major challenge. We believe this would not have been possible without the strong commitment of our development team to deliver the best-fit solutions, especially the efforts of our Business Analyst. 2. Cross-Time-Zone Collaboration The client-side teams operated across multiple regions, including Japan, Southeast Asia, and Europe. To coordinate effectively, they had to deal with time zone differences, cultural differences, and varying work styles. So, how did we tackle such a Complex Transformation within a limit time? Navigating the challenges with both technical expertise and ownership  To keep up with global demand and high expectations from customers, the client needed to modernize its internal systems. But making changes at this scale wasn’t easy. SupremeTech had to overcome a range of technical and coordination challenges to ensure a smooth and successful transition: Proactive Mindset Quickly learning the workflow and system wasn’t enough; we had to troubleshoot why the app wasn’t working. Whether it was due to gaps in our understanding or setup issues from the support team, we had to keep moving forward, identify the root cause, and ensure successful deployment. SupremeTech engineers took the initiative step by step. They identified potential risks, assessed the impact on all stakeholders, and built mitigation strategies directly into the project timeline. This approach helped the team meet delivery milestones without compromising quality, even under tight constraints. Flexible Work Approach Working with just four team members on a project of this scale required laser focus and disciplined execution. With a product-focused mindset, with limited resources, it was crucial that every team member understood the broader system and took accountability for both outcomes and cross-functional collaboration. Streamlined Communication with a Clear Source of Truth Using chat channels was fast and convenient for communication across time zones. However, to avoid scattered updates, we created a single source of truth by setting up centralized documentation. This helped keep tasks clear, accountable, and on track. The team also placed a strong focus on role clarity. Everyone knew who was responsible for each task, who had the authority to approve it, and who should escalate any issues. This ensured smooth decision-making during critical moments. Shared Entrepreneurial Energy This wasn’t just a technical assignment. SupremeTech saw it as a shared venture. By aligning with the client’s entrepreneurial mindset, we became a strategic ally rather than just a vendor. This project demonstrated that even the most complex transformations can be successful with the right approach. By staying aligned with the client’s brand values, adapting to change, and working seamlessly across teams and borders, we delivered a solution that was both robust and future-ready. Here are some key takeaways for others on a similar journey: Keys takeaways For Luxury Brand Leaders Digital transformation doesn’t have to be disruptive. With clear goals, strong collaboration, and the right technology partner, even complex system migration can run smoothly. The key is aligning innovation with the company’s brand identity, operational reality, and long-term vision. For IT & Digital Teams We would suggest Design for change. Business needs can shift quickly, so systems must be able to adapt. Flexibility is not a bonus option. It is essential for long-term success.Plan for the future. Scalable architecture solves more than current problems. It helps save time, reduce costs, and prevent technical debt in the future.Collaborate across regions and teams. In global projects, strong coordination across departments, cultures, and time zones is not optional. It is the key to real progress. We understand that one success does not ensure the next, so we treat every upcoming opportunity as a great chance to learn. Each project will present new challenges to test our technical capabilities and project management skills. These challenges will sharpen our competencies and refine how we deliver, regardless of the situation's complexity. >>> Read more related articles:  LINE Mini App: Digital Transform Customer Service with Digital Point CardsLINE and Mobile Commerce Platform in Japan Future Prospects For the Client With this new digital infrastructure in place, the brand is now better prepared to deliver personalized, localized, and premium experiences across flagship stores, regional boutiques, and online platforms. The foundation is ready to support future innovation in areas such as CRM, client interfaces, and omnichannel commerce. For SupremeTech This project demonstrated and validated our ability to operate as a reliable strategic partner to luxury brands undergoing digital transformation at scale. We don’t just deliver code; we elevate customer experience and build technology that scales with ambition, while also preserving its heritage and protecting it. SupremeTech’s Service for Luxury Brands How We Help Luxury Brands Transform At SupremeTech, we specialize in helping luxury and retail brands navigate technical complexity with elegance and precision. Our tailored services include: Platform Strategy & IntegrationSystem Migration & Legacy Tech UpgradeLINE & Salesforce IntegrationEvent Management SystemsCustom Digital Advisory Want to know more about the LINE MINI App project for this client? Explore in the second episode of this series: Enhance the Customer Experience on Digital Platforms for Luxury Brands We understand what’s at stake for your brand equity, reputation, and customer loyalty, and we treat every project with that level of care. Looking to future-proof your luxury brand’s digital infrastructure? Please consult with our experts to discover how we can help you align your technology with your brand's vision. Development systems and technologies Below are the resources and technologies we use to develop the services: Details of entrustment: Design, Implementation, Testing, Migration, Maintenance & OperationPlatform: LINE MINI App (WebApp)Development language: NextJS (React Framework), TypeScriptTeam structure: 2 MM x 4 monthsProject Tech Lead 0.5 Business Analyst 0.5Infra Engineer 0.5Quality Control 0.5

        09/06/2025

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        Khanh Nguyen T. M.

        Our success stories

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          Enterprise-level AWS migration for a Global Luxury Jewelry Brand

          09/06/2025

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          Khanh Nguyen T. M.

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            Enhance the Customer Experience on Digital Platforms While Protecting the Legacy for Luxury Brands

            Luxury branding is undergoing a digital revolution as brands adapt to meet the evolving expectations of modern consumers. A case study of a century-old luxury brand demonstrates how traditional values can be preserved while embracing digital transformation. Through mobile-first solutions like LINE Mini App in Japan, brands can now enhance customer experience and offer seamless digital experiences for events, store check-ins, and personalized services.  The key to success lies in striking a balance between heritage and innovation, implementing localized solutions, and maintaining simplicity while delivering personalized experiences. The future of luxury retail depends on unified loyalty programs, cross-channel CRM systems, and continuous digital innovation, enabling brands to remain both timeless in identity and contemporary in customer experience. Digital Transformation for Luxury Brands As widely known among business owners, digital transformation in customer experience in this decade means utilizing technology to diversify and enhance customer experience across digital touchpoints commonly used by general mobile users.  For some traditional businesses, digital transformation includes migrating sales and operations to a digital environment and unifying the customer experience across online and offline channels. Even though the strategies may vary among brands, there are some common tactics, including online bookings, e-commerce, digital membership, and messaging apps. No business can stand on the sidelines of the digital transformation wave unless growth is no longer among their primary objectives. Luxury brands, regardless of their size and traditional roots, are compelled to undergo digital transformation, especially when serving the top, elite, sophisticated, and tech-savvy clientele. While competition is fiercer than ever, digital transformation is rather a must than a choice. The point is, which brand does a good enough job of balancing its unique heritage with digital experiences? Luxury shoppers expect fast, convenient, and mobile-first service, but they also demand exclusivity, consistency, and personalized experiences, especially in huge-spending markets like Japan and China. The real challenge for luxury conglomerates is to remain true to their identity while meeting the new digital expectations of their customers. Balancing Legacy and Innovation: A Case Study of SupremeTech’s Client  Though flashy, the concept of digital transformation may seem, implementing it successfully comes with more challenges than thought. It's a proven point that we made when we began working with one of the world's most prominent luxury brands, boasting over 100 years of history. While its legacy and loyal customer base remain strong, it cannot neglect the growing preference of customers to connect more conveniently via mobile in specific markets. In our case, the market is Japan, a matured market regarding mobile-first customer experience.  At the time of collaboration, there were some obvious challenges to elevate and enhance customer experience of luxury brands. Manual processes, such as event RSVPs, store check-ins, and after-sales service, could be partially digitized to enhance customer bonding and ease operations.User-friendliness and convenience should be at the heart of any digital transformation idea. Japanese customers, although tech-savvy, do not readily adopt using an entirely separate app for minor tasks. Existing and standard tools, such as SMS messaging and Line messaging, did not provide sufficient support and could not be customized to meet the expectations of high-end customers in key markets like Japan, where mobile-first and personalized experiences are preferred. So what’s the challenge? We need to deliver a digital solution where personalized customer service and event booking are likely to take place and sync it up with offline journeys, making the online and offline experiences feel seamless. The newly built solution not only needs to fulfill the objective but also needs to align with the client's existing system, both technically and aesthetically. Last but not least, it must be friendly to Japanese customers and require minimal effort to stay connected.  Apart from the challenges above, for some luxury conglomerates, it takes multiple layers to protect their heritage and ensure that the brand voice is consistently echoed across all customer touchpoints. Therefore, a multi-layer decision-making process is something that a technology partner like SupremeTech is challenged to manage to ensure technical deliveries. See how our development team thrives in collaboration with our client's multi-layered and multinational system. >>> Read more related articles:  LINE Mini App: Digital Transform Customer Service with Digital Point CardsLINE and Mobile Commerce Platform in Japan Be the Early Bird in Localized, Digital-First Experience with LINE MINI App For these similar requirements in the Japanese market, LINE MINI App, the most popular messaging app in the country, has been and will continue to be the best choice for maintaining relationships with end customers. That’s why the client came to us with a clear goal: to enhance customer experience through a LINE Mini App while preserving their luxury heritage.  The advantages of the LINE MINI App are also its setbacks in terms of requirements. While other competitors also use LINE MINI App for the same purpose, our technical solution would help our client differentiate themselves in the luxury industry that worships outstanding experiences. Through collaborative workshops with both client and design teams, we identified pain points across customer touchpoints and internal operations. There was strong motivation for change, but any solution had to fit seamlessly into their existing ecosystem of legacy systems and workflows. Instead of generic tools, we developed tailored, digital-first experiences that aligned with their premium brand identity. By bridging business goals with real user needs, we turned high-level digital ambitions into localized, practical solutions that delivered lasting value. Mobile-First Platforms for Events & Services In markets like Japan, mobile apps are the gateway to customer and brand connections. We started to help the brand integrate mobile-first tools that allow customers to do the following tasks within their LINE App: RSVP to events, receive digital tickets, and check in via QR codes. Digital event RSVP is enabled and synced with check-in at events. Access personalized services through local platforms.Personalized follow-up messages with exclusive content—all integrated within LINE, Japan's most popular messaging app. We customized the LINE MINI App for clients by building the needed features. Let’s explore a tailored RSVP flow—carefully designed to set the standard for luxury brands. This streamlined, digital-first experience has already positioned our clients as leaders in delivering high-touch, premium engagements in the market: As described, the RSVP journey has become a key touchpoint for delivering a premium and modern customer experience. By combining multiple localized entry points, such as push notifications, QR codes, and rich menus on LINE, with a fast and intuitive registration process, luxury brands can create seamless engagement that feels exclusive and effortless. From customizable reservation options to instant confirmations and quick in-store check-ins, every step is designed to reflect the brand’s commitment to service, elegance, and personalization. Ongoing digital enhancements will continue to elevate this flow, setting a new benchmark for customer-centric luxury experiences in every market. Enhanced CRM & Personalization Engines We support the centralization of customer data across online and offline channels. This allowed the brand to: Track behaviors and preferencesPersonalize content and servicesDeliver tailored communications that reflect individual tastes and needs Key takeaways – Digital Know-How Is Essential for Luxury Brands This transformation journey revealed a key truth: as luxury brands increase their digital touchpoints, the expectations for personalization grow even higher. From event invites to post-sale care, every interaction must feel intentional, elegant, and aligned with the brand’s values. That level of customization does not happen by accident. It requires the right expertise and a dedicated team to design and deliver it. Here are the essential takeaways for any luxury brand going digital: Luxury can go digital without compromising on heritage or exclusivity when done thoughtfully.Localization is essential. Using the right platforms (LINE in Japan, WeChat in China) ensures your brand fits seamlessly into your customers' digital lifestyles.Simplicity is key. Technology should streamline the experience, not complicate it.Personalization builds loyalty. The more digital touchpoints you introduce, the more important it becomes to tailor every moment to each individual.A skilled digital team is no longer optional. To meet the rising bar of luxury customer expectations, brands need expert support to design, manage, and evolve these experiences at scale. Future Prospect – A User-Centric, Seamless Digital Future Looking ahead, the most successful luxury brands will be those that embrace user-first design and seamless integration across platforms. As more customer interactions move online and age groups expand, the number of digital touchpoints is growing—and so is the need for every experience to feel highly personalized and consistent. This shift means that brands can no longer rely on generic solutions. They need dedicated teams and the right digital expertise to craft experiences that reflect their values and meet customer expectations at every step. A trusted technology partner will create more spaces for clients to focus on crafting winning business ideas. During the development process, as a solution architect, we identify the enhancement prospects that can lead to sustainable customer retention for the business. Unified loyalty programs that connect both online and in-store behaviorsCross-channel CRM systems that offer a complete, 360° view of the customer journeyOngoing innovation in digital experiences that deepen engagement By combining innovative technology with a deep understanding of their customers, luxury brands can stay both timeless in identity and timely in experience, true to their legacy while fully ready for the future. How SupremeTech Helps Luxury Brands Enhance Customer Experience We support luxury and retail clients with tailored digital transformation strategies. Our services include: Platform Strategy & Integration(LINE, Salesforce, Event Management, System Migration, Legacy Tech Upgrades)Loyalty Program IntegrationCustom solutions that connect CRM data with customer touchpoints.Digital Product & App DevelopmentFrom concept to launch, we build digital tools that enhance luxury experiences. Ready to elevate your luxury customer experience? Let’s contact us to discuss how digital transformation can help you protect your legacy while creating future-ready experiences. Development systems and technologies Below are the resources and technologies we use to develop the services: Details of entrustment: Design, Implementation, Testing, Migration, Maintenance & OperationPlatform: Line Mini App (WebApp)Development language: NextJS (React Framework), TypeScriptTeam structure: 6.5 MM x 8 months  Project Manager 0.5Project Tech Lead 0.5 Business Analyst 1.0Infra Engineer 0.5Backend Lead 0.5Backend Dev 1.0Backend Lead 0.5Backend Dev 1.0Quality Control 1.0

            04/06/2025

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            Khanh Nguyen T. M.

            Our success stories

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              Enhance the Customer Experience on Digital Platforms While Protecting the Legacy for Luxury Brands

              04/06/2025

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              Khanh Nguyen T. M.

              Our success stories

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                SupremeTech and OTTclouds will attend Vietnam ICTCOMM 2025

                SupremeTech is thrilled to announce that we, alongside our OTTclouds solution, will be showcasing at Vietnam ICTCOMM 2025 in Ho Chi Minh City from June 12 to June 14, 2025. As a leading ISO-certified Agile software development company, SupremeTech aims to connect with industry pioneers and technology enthusiasts, demonstrating how FAST Channel and OTT Streaming solutions of OTTclouds can transform digital media delivery.  Attendees will have the opportunity to engage with our experts, explore a live demo of OTTclouds, and learn about our innovative approach to custom software and Agile methodologies. SupremeTech and OTTclouds at Vietnam ICTCOMM We are excited to reveal that SupremeTech and our flagship product, OTTclouds, will participate in Vietnam ICTCOMM 2025. This pivotal event is one of Southeast Asia’s premier platforms for telecommunications, IT, and communication technologies. Our presence underscores our commitment to innovation, partnership, and driving progress in the digital media landscape. Attending ICTCOMM allows us to share our vision for the future of streaming and showcase the robust capabilities of OTTclouds, which include FAST Channel and end-to-end OTT Streaming services tailored for broadcasters, media companies, content owners and enterprises. About Vietnam ICTCOMM 2025 Vietnam ICTCOMM is an international exhibition focused on products and services related to telecommunications, information technology, and communications. ICTCOMM 2025 will occur on 12-14 June at the Saigon Exhibition and Convention Center (SECC) in Ho Chi Minh City. Vietnam ICTCOMM is a strategic platform for telecommunication businesses to connect, collaborate, and promote their brands and services. The exhibition emphasizes emerging AI, IoT, 5G, cybersecurity, big data, and broadcast media trends. By bringing together government agencies, corporate executives, startups, academics, investors, and media professionals, ICTCOMM fosters valuable networking opportunities and highlights technologies shaping the future of communication. Why We’re Joining – SupremeTech’s Mission At SupremeTech, we aim to deliver secure, high-quality software solutions that drive business transformation. Founded in 2020, we have expanded to over 170 employees and worked with trusted clients across Japan, the US, and Australia. Through Agile and Scrum methodologies, we accelerate product delivery while maintaining rigorous quality control. We view ICTCOMM 2025 as an essential opportunity to forge new partnerships, exchange insights with both local and global industry leaders, and illustrate how our custom software development, OTT Streaming platforms, and HR Tech services can solve specific customer needs. Meet OTTclouds – Powering the Future of Video Streaming OTTclouds is SupremeTech’s comprehensive solution for digital media delivery, offering both FAST (Free Ad-Supported Streaming TV) channels and OTT Streaming services. Designed for broadcasters, content providers, and enterprises, OTTclouds enables: White Label OTT Streaming Applications: Launch your custom-branded OTT applications and CMS access to manage content and apps within days. Apps are available on web, iOS, Android and Android TV.FAST Channel: Create advanced HLS playout including EPG, Graphics Setup, Fallback, Ad breaks. Other advanced features include SCTE-35, Live Event Switch, Encoding, and Transcoding, among others.Monetization Flexibility: Ad-supported (AVOD) and subscription-based (SVOD), and transaction-based (TVOD) models to optimize revenue streams.Cross-Platform Compatibility: Seamless delivery across web, mobile, smart TVs, and connected devices.OTTclouds CMS: End-to-end CMS for content, user and app management, and analytics dashboards for real-time insights. Several media companies have leveraged OTTclouds to expand their audience reach, streamline content workflows, and increase engagement, demonstrating ROI through improved user retention and advertising revenue. >>> See more: User Experience in FAST vs. AVOD: A Comprehensive Comparison What to Expect at Our Booth Interactive Demos Visitors to our booth at ICTCOMM 2025 (Booth V9, Hall A) can experience live demonstrations of the OTTclouds platform. Our team will walk attendees through FAST Channel setup, OTT app configuration, and real-time analytics usage. Attendees can interact with sample dashboards and learn how to manage content libraries, schedule playlists, and optimize ad placements. Industry Insights Sharing We will share case studies from e-commerce, retail, and healthcare industries, illustrating how SupremeTech tailors solutions to meet each client’s unique requirements. Networking Opportunities Engage with our leadership team to explore partnership opportunities, joint ventures, and potential integrations. We welcome discussions with broadcasters, telecom operators, and digital media agencies eager to adopt streaming technologies. Let’s Connect! We invite all current and prospective clients, technology partners, and media professionals to visit our booth V9 at Vietnam ICTCOMM 2025. Please contact us to schedule a meeting in advance.  Whether you’re exploring enhanced streaming solutions, seeking Agile software expertise, or looking to collaborate on groundbreaking projects, our team is here to help. We look forward to meeting you at Vietnam ICTCOMM from June 12–14, 2025. Let’s unlock new possibilities together! If you are interested in attending any panel discussions or breakout sessions featuring SupremeTech representatives, we’ll share details on our social media channels leading up to the event. Follow us on LinkedIn and Facebook for the latest updates.

                22/05/2025

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                Ngan Phan

                Our success stories

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                  SupremeTech and OTTclouds will attend Vietnam ICTCOMM 2025

                  22/05/2025

                  159

                  Ngan Phan

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