Lead/Principle Backend Engineer

20 hours ago

Singapur, singapore Triple A (M) Sdn Bhd Full-time SGD 240,000/year

About the role

We are looking for a hands-on Lead/Principal Engineer to own the technical direction of our money-movement core: wallets, deposits, payouts, settlement and balances. You will lead our move to a double-entry ledger, raise the reliability bar on the money path, and mentor a strong backend team, while still shipping code every week.

Responsibilities

  • Own the architecture of our crypto payment gateway: checkout and payment pages, payment links, webhooks and merchant APIs
  • Architect and evolve stablecoin/crypto deposit, payout, refund and settlement flows
  • Lead the migration from counter-based balances to a ledger, with zero financial drift
  • Design resilient integrations with custody and liquidity providers
  • Define HLDs and review LLDs
  • Set standards for API design, idempotency, webhooks, testing and observability
  • Mentor engineers and partner with Product, Compliance and Finance Ops

Requirements

  • 8+ years in backend engineering, 3+ leading technical direction in payments, fintech, exchange or custody
  • Deep Node.js or Go experience in large, long-lived codebases
  • Experience building or operating a payment gateway or PSP (checkout, payment status lifecycle, refunds, merchant webhooks)
  • Track record as a software architect, or leading architecture and system design for production platforms
  • Strong PostgreSQL: transactions, concurrency, safe migrations, performance tuning
  • Proven design of idempotent, auditable money-movement and reconciliation systems
  • Experience integrating third-party financial or custody APIs and signed webhooks
  • Strong security mindset and clear written communication

Nice to have

  • Rust or Go, or double-entry ledger experience
  • Hands-on blockchain knowledge: UTXO and account-based chains, confirmations, fees, stablecoins on EVM, Tron or Solana
  • AWS, Docker, OpenTelemetry, Prometheus, gRPC

Our stack

TypeScript, PostgreSQL, REST / gRPC / WebSocket, AWS, Docker, Redis, NATS, OpenTelemetry, Ledger services.

Why join us

  • Own a high-impact domain in a regulated, growing crypto payments business
  • Work on real problems: ledgers, multi-chain settlement, card-network and exchange integrations