Hieu Le
Full-Stack Developer · Ho Chi Minh City
Summary
Full-stack developer with 3+ years of experience. I build products end to end: web apps, mobile apps and the backend that keeps them running, most recently for a crypto app with 200K+ users.
Experience
KVY Technology · Software Engineer
2025 – nowCerebro (cerebro.xyz) · crypto portfolio tracker
2025 – 2026- Built the Next.js web app and Node.js backend as the product grew to 200K+ users and 7K+ daily active users.
- Built data collection across 8 exchanges and 6 on-chain platforms, plus the admin dashboard the team used to watch it.
Sway (sway.fun) · narrative trading app
2026 – now- Built a Rust service that shares the exchange's request limit so trades always go first.
- Wrote the Solidity contract that pays fee rewards on Arbitrum, plus the backend that batches and checks payouts.
- Split completed-trade matching into its own service with lag alerts; built notifications and app screens in Expo.
Madeezi · Freelance Full-Stack Developer
2025 – 2026- Built GreenMaster Go for 3,800+ customers and 200 technicians: Rails API, React admin and Expo app (case study).
- Customers sign off each visit on the technician’s phone, by signature or a one-time code via Zalo or SMS.
BenKon · Software Engineer
2024 – 2025- Re-architected the admin dashboard, cutting page load time by 30%.
- Shipped the BenKon App and Surface App for device control and meeting rooms; built a CMS, i18n system and icon library.
BenKon · Front-end Developer Intern
2023 – 2024- Built an interactive floor-plan and equipment layout editor in React and SVG, solo.
Skills
- Languages
- TypeScript, JavaScript, Ruby, SQL, Rust, Solidity
- Frontend
- React, Next.js, React Native / Expo
- Backend
- Node.js, NestJS, Express, Rails
- Data
- MongoDB, Redis, PostgreSQL
- Infra
- Docker, GCP, GitHub Actions, Sentry