Blockchain Payments Integration - Backend Engineer (TypeScript)

Backend Engineer (TypeScript) We're building a high-performance financial ledger connecting fiat payment rails and blockchains through service providers. We're looking for a backend engineer to work on integrations that bridge traditional banking (ACH, WIRE, SEPA) with on-chain stablecoins. What You'll Work On • Building and maintaining services that connect Banking-as-a-Service providers to our network • Implementing on-ramp (fiat to tokens) and off-ramp (tokens to fiat) pipelines with strong idempotency guarantees • Designing queue-based processing pipelines for multi-step financial transactions • Working with identity/compliance infrastructure: KYC certificates, selective disclosure, encrypted attribute sharing • Publishing service metadata for decentralized discovery by wallets and other services • Writing integration tests against real APIs and a local blockchain node Tech Stack • TypeScript / Node.js (ESM) • PostgreSQL • Vitest • Custom SDK ecosystem What We're Looking For • Strong TypeScript skills with emphasis on type safety • Experience integrating with banking/payment APIs (ACH, wire transfers, BaaS platforms) • Comfort with asynchronous pipeline architectures (queues, retries, idempotency) • Understanding of blockchain concepts (token minting/burning, on-chain permissions, transaction signing) • Preference for integration tests over unit tests; ability to write tests that exercise real system behavior end-to-end • Familiarity with explicit resource management patterns (AsyncDisposable, structured cleanup) • Experience working with different third-party integrations Nice to Have • Experience with KYC/KYB compliance flows and certificate-based identity • Multi-currency system design (FX, per-currency fee structures, decimal handling) How We Work • Strong code ownership • Small team, high autonomy, direct impact on financial infrastructure Straightforward Recruitment: • We respect your time. Our 2-step recruitment process is designed to be efficient and meaningful. • Flexible Work Environment: Work from anywhere. Align with sprint goals and deliverables - we trust you to manage your productivity.