phoonks
Golang Backend & Blockchain Engineer | Exchanges, Wallets, Integrations
Golang backend engineer in Singapore with 8 years in fintech and crypto. Day job at Merquri: backend for a white-label crypto exchange, a multi-chain superwallet and an MPC custodial wallet (Golang, PostgreSQL, Kafka, Redis, REST). Before that, four years at Pentajeu building exchange platforms, a triangular arbitrage system (CCXT, Web3, WebSocket) and a crypto brokerage (NodeJS, PHP, MySQL, AWS).
Open to remote part-time and contract work (10 to 15 hours a week): Golang APIs and integrations, wallet and exchange backends, EVM chain indexers, and clean websites or landing pages in plain HTML/CSS/JS. Fixed quotes, daily updates, honest about scope.
Demos: https://phoonks.github.io/portfolio-demos/ | GitHub: https://github.com/phoonks
Experience: 8 years
Yearly salary: $60,000
Hourly rate: $40
Nationality: 🇸🇬 Singapore
Residency: 🇸🇬 Singapore
Experience
Software Engineer (Golang backend, blockchain department)
Merquri 2022 - 2026
Golang backend for a white-label crypto exchange (CEX), a multi-chain superwallet and an MPC custodial wallet mobile app: wallet APIs, deposit/withdrawal flows, REST APIs for web and mobile, Kafka async processing, Redis caching, PostgreSQL schema design, on-chain integration via Etherscan and Web3.
Back End Developer (full-stack, blockchain department)
Pentajeu Sdn. Bhd. 2018 - 2022
White-label crypto exchange, IPO and tokenised share exchange systems; a triangular arbitrage trading system (CCXT, Web3, WebSocket); a crypto brokerage platform (NodeJS, PHP/Yii2, AngularJS, MySQL, AWS). Later projects in Golang (Gin), Vue.js and Alibaba Cloud. Led client meetings on project structure and workflow.
Skills
api
backend
blockchain
golang
javascript
postgres
redis
english
chinese-mandarin