About

Bùi Thế Sơn

I'm a software engineer based in Ho Chi Minh City, Vietnam, with over 12 years of building consumer mobile products. Native iOS since 2013, Flutter after that, from early versions all the way to production.

My path went from writing Objective-C at an outsourcing house, to founding my own startup (ShipDauRoi, which reached the Top 50 Business apps on the Vietnam App Store), to building a global platform for Pizza Hut, to health tech at Jio Health, and now building a realtime super app at Supernova.

How I work

I like owning a feature the whole way, from architecture and technical planning through to production. The part of the job I enjoy most is what happens after launch, when the code meets real devices, real networks, and the bugs that only exist there.

Above all I believe in sharing practical knowledge. Not theory, but the real lessons that come from shipping products and serving real users.

Mobile ArchitectureOffline FirstRealtime SystemsPerformance Tuning

Detailed work history and full résumé available on request.

Highlights

15+ Apps Shipped

From patient and doctor apps to live streaming and restaurant POS.

Top 50 App Store VN

ShipDauRoi, my own startup. Business category, 2018.

iOS Instructor

One of the first iOS instructors at Aprotrain Aptech.

Career journey

Senior Mobile Engineer & Project Lead

Supernova

2026 - Present

Own the mobile platform for Sync, a secure communication super app, across Flutter, native iOS, and Android. End to end encrypted messaging with secure key management, a zero knowledge encrypted backup vault, bidirectional gRPC streaming with a SQLite sync engine that keeps working offline, and voice and video calling on WebRTC and CallKit. I own the architecture and technical planning through to production.

Senior Mobile Engineer

Jio Health

2019 - 2026

Built the patient, doctor, and internal staff apps at a US health tech startup running hybrid care from clinics in Ho Chi Minh City and Hanoi, across native iOS and Flutter. Delivered telemedicine video consultations, realtime care chat, appointment booking, and HealthKit sync, and took features from first commit to release.

Senior iOS Developer

Pizza Hut Digital Ventures

2018 - 2019

Built the global iOS platform and the internal libraries behind it for Pizza Hut's digital transformation, shared across the markets that shipped on top of them.

Founder & Developer

ShipDauRoi (Startup)

2017 - 2018

Built a shipping service app connecting shops with free shippers, and shippers with orders they could deliver in their spare time. Reached the top 50 Business apps on the Vietnam App Store in 2018.

iOS Instructor

Aprotrain Aptech

2016

Among the first iOS Development instructors at the center, designed the initial curriculum and lesson plan.

iOS Developer → iOS Team Leader

Savvycom JSC

2014 - 2018

Shipped projects for international clients, including ImHelo live streaming, iHeart Local social network, JPOS restaurant management, and Milky Chat, moving from UIKit and Objective-C into Swift along the way.

iOS Developer Intern

DFT JSC

2013 - 2014

Where the iOS career started, as an intern maintaining existing applications and building internal projects.

Tech stack

Languages

Dart (Flutter)SwiftObjective-CRust

Architecture & Patterns

Clean ArchitectureMVVMMVPMVC

iOS Frameworks

UIKitCocoaPodsSnapKitCore AnimationRxSwiftHealthKitLocal Notifications

State Management (Flutter)

RiverpodBLoCCubitProvider

Realtime & Mobile

gRPC streamingWebSocketWebRTCAPNsFCMCallKit

Security & E2EE

End to end encrypted messagingEncrypted backup vaultKeychainKeystore

Crypto Wallet

Self custody multichain walletEthereumSolanaTONTronBitcoinOn device signing

Local Storage

SQLiteDriftRealmCore Data

APIs & Integration

RESTfulJWTFirebaseGoogle MapsMoMo SDKOnePay SDKZoom SDKZego Cloud

CI/CD & Release

FastlaneXcode Cloud

Tools

XcodeAndroid StudioVS CodeCharles ProxyPostmanFigmaZeplinJIRAConfluenceSlack

AI Assisted Development

Claude CodeCursorGitHub Copilot