Mobile & Full-Stack Engineer

Thien Nguyen

Building mobile apps, SDKs and secure products that people rely on every day.

About me

I'm a mobile-focused full-stack engineer with 5+ years of shipping React Native, Flutter and native Android/iOS products — from blockchain wallets and game SDKs to the apps running on vending machines.

At Masan Group I lead a small squad building and operating the Winnie vending-machine app and its over-the-air update system. Before that I built the Ronin Waypoint SDKs at Sky Mavis, and worked on crypto wallets and mobile security at VNG.

Beyond code, I care about mobile security and UI/UX design — I like products that are both safe and a pleasure to use.

Away from the screen, I love travelling and listening to music. I speak English fluently, so working and talking with international teammates comes naturally.

Years shipping
5+
Companies
3
Projects
6
Technologies
22

Outside workTap one

Vietnam

Experience

Software Engineer

May 2021 — Oct 2023

VNG Corporation

  • Developed a blockchain wallet mobile app: transaction tracking and smart contract integration.
  • Wrote unit tests and E2E scripts (Appium) to make sure the app worked as expected.

Software Engineer

Nov 2023 — Dec 2024

Sky Mavis

  • Designed and developed Android and iOS SDKs for seamless integration with Ronin Waypoint.
  • Optimized the performance and security of the Web SDK with WebAssembly, cutting load times by 30%.

Full-Stack Engineer

Mar 2025 — Present

Masan Group

  • Lead a small squad for the development and operations of the vending machine platform.
  • Developed the Winnie app for vending machines located at WinMart.

Selected work

Sky Mavis · Nov 2023 — Dec 2024

Ronin Waypoint SDKs

Android, iOS and Web SDKs for the Ronin Waypoint keyless wallet.

KotlinJavaSwiftTypeScriptWebAssembly

Sky Mavis · Nov 2023 — Dec 2024

Ronin Wallet — MPC

Brought Multi-Party Computation to Ronin Wallet: 50% faster wallet creation.

React NativeKotlinSwiftMPC

Sky Mavis · Nov 2023 — Dec 2024

Axie Classic — Waypoint login

In-game login and transactions through the Unity SDK, 50% faster.

UnityKotlinSwift

Masan Group · Mar 2025 — Present

Winnie — Vending Machine

The app and OTA platform behind the vending machines at WinMart.

FlutterReact NativeKotlinJavaNext.js

VNG Corporation · May 2021 — Oct 2023

Mobile Security

Security testing for mobile games and apps.

FridaJadxSmaliProxyman

Personal project · 2026

Liquid Glass UI

An iOS 26-style liquid glass component kit for the web.

ReactThree.jsReact Three Fiber

How I work

What do you work on?

Mobile is my strongest area; on the web I work with Vite and Next.js.

Do you use AI?

Yes, a lot. I code with Claude (Max plan, Opus 5.5) and Codex (GPT Astra 6).

How do you like to work?

I love working remote, and I usually communicate async.

Skills

Languages

JavaScriptTypeScriptJavaKotlinSwift

Mobile

React NativeFlutterAndroidiOSUnity

Web

ReactNext.jsTailwind CSSRedux ToolkitWebAssembly

Mobile security

FridaJadxSmaliProxyman

Testing & tooling

AppiumEasy PeasyGitLab

Off-screen

Road trips by motorbike

I love travelling by motorbike.

Manga and music

I read manga and listen to music.

Cats

And I really like cats.

One honest note

One honest note before you write: I don't have a university degree. What I do have is 5+ years of shipping mobile and web products. If a degree is a must for the role, please weigh that first.

Let's work together

Have a project or a role in mind? I am always happy to talk.