Holicay
Took a four-year-old web product mobile—architecting and shipping the React Native app to both stores in six months as the sole mobile engineer.
Senior software engineer · HCMC
I'm Huynh Hoang—a full-stack engineer focused on React Native, mobile SDKs and reliable product systems. From first architecture to store release, I turn ambitious ideas into software people use.

Selected work
Architecture, delivery and operations—owned all the way through.
Took a four-year-old web product mobile—architecting and shipping the React Native app to both stores in six months as the sole mobile engineer.
Built the mobile app, API server and admin portal end to end, including native media compression, live streaming, payments and production operations.
Delivered the Lootbox and Affiliate experiences for a hard televised launch, then reduced backend load and improved large-screen startup performance.
Earlier work · 2020 — 2023
Client apps for Korea and Vietnam, built before TechZeus—most as the engineer who set up the codebase and took it to the stores.
NFT utility app
Wallet-based NFT ownership verification with a quest system that upgrades NFT utilities.
Cross-border logistics platform
Marketplace for overseas warehouse fulfillment, with seller, warehouse and operator portals. Led and mentored five engineers.
Loan contract app
Create, sign and export loan contracts, then track repayments with push and SMS reminders.
SIM trading marketplace
Search, buy and sell phone numbers, with seller onboarding built into the app.
Social network · Kyobo Book Centre
Photo-sharing social network with Naver, Kakao, Google and Apple sign-in and in-app purchases.
Gamer matching app
Matches players who share favourite games and connects them through real-time chat.
Telehealth platform
Patient app for phone consultations, medical orders and payments, plus web consoles for hospitals, doctors and pharmacies.
Loyalty app · KBVision
Loyalty programme for KBVision customers: points, promotions, prize games and in-app calling.
How I work
I work close to product owners and designers, translating messy constraints into clear technical decisions—and staying around to measure what happens after launch.
React Native, native Android/iOS modules, SDK integrations, billing, IAP and store releases.
React, Next.js and TypeScript interfaces with durable component architecture and considered UX.
APIs, webhooks, serverless functions, CI/CD and observability that hold up in production.
Experience
2023 — NOW
TechZeus · Singapore / Remote
Leading architecture and delivery across React Native, Next.js and backend systems for Holicay, Snap4Me and Arntreal.
2020 — 2023
BrickMate Group Vietnam
Led a five-person team, established project foundations and mentored engineers across React and React Native products.
2019 — 2021
FTC Joint Stock Company
Owned web and mobile features from architecture to deployment, integrating Firebase, Stringee and event-driven services.
2018 — 2020
HAYABUSA Co., Ltd
Built cross-platform mobile products with React Native and Laravel backends.
Available for the right opportunity
Let's talk about mobile architecture, full-stack delivery or the next hard problem worth solving.