Senior Backend Engineer (Node.js Fintech)

TL;DR

Senior Backend Engineer (Node.js): build and scale the backend for a borderless neobank on stablecoin rails with an accent on traditional banking integrations, blockchain infrastructure, and card issuance. Focus on ensuring every transaction is correct, every webhook is idempotent, and every workflow survives a crash.

Location: Remote from Europe or South America

Company

Global network of top talent in business, design, and technology enabling companies to scale teams on-demand, with $200+ million annual revenue and fully remote workforce.

What you will do

• Deliver end-to-end features across banking, cards, crypto, and compliance modules
• Design Temporal workflows for critical financial operations
• Ensure webhook integration reliability using inbox pattern, signature verification, and IP whitelisting
• Evolve event-driven architecture
• Handle observability and incident response for payment flows

Requirements

• Resumes and communication must be in English
• No visa sponsorship or assistance
• Strong TypeScript/Node.js (NestJS preferred), PostgreSQL, GraphQL API design
• Event-driven architecture, outbox/inbox patterns, idempotency
• Temporal.io or equivalent for durable workflows
• Fintech domain: payment rails, double-entry accounting, KYC/AML
• Web3/Blockchain: Solana ecosystem, stablecoins, wallet custody
• Agentic engineering: daily use of AI coding assistants like Claude Code
• Observability: APM, tracing, error tracking, structured logging

Nice to have

• Experience with Privy, Sumsub, Noah, or Rain APIs
• AWS KMS/HSM-backed signing
• PostgreSQL logical replication
• NestJS at scale (20+ modules)
• Contributions to internal developer tooling

Culture & Benefits

• Agentic-first engineering with AI tools as core infrastructure
• Correctness over speed: emphasis on idempotency, transactional integrity, crash-resilience
• Codified standards in .claude/rules/, ADRs, CLAUDE.md files
• TDD encouraged with dedicated tooling
• Pre-commit quality gates: lint, typecheck, full tests