Senior Backend Developer / Tech Lead (TypeScript/Node.js)

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#vacancy #job #remote #hiring #BackendDeveloper #fintech #crypto #blockchain #TypeScript #NodeJS #NestJS #microservices #PostgreSQL #Web3 #Tech #Lead #wallet #onramp #offramp #cryptocards

👩🏻‍💻 Role: Senior Backend Developer / Tech Lead (TypeScript/Node.js)
💰 Product: Fintech (crypto wallet, on/off-ramp, crypto cards)
📍 Remote | Full-time

What you'll do:
🔧 Own backend architecture across two large-scale platforms (30+ and 25+ microservices) — system design, API contracts, data flow, inter-service communication.
🔧 Lead complex integrations with payment providers, card issuers, and blockchain networks — retries, circuit breakers, graceful degradation in production.
🔧 Drive performance: profile slow services, design caching strategies, optimize queries, plan for scale.
🔧 Shape technical direction and make architectural decisions.
🔧 Build and extend AI-powered internal tools and automations — our team runs LLM-based systems across the full dev cycle, and you'll take it further.

What you bring:
💡 5+ years TypeScript/Node.js in production. NestJS for 2+ years — modules, guards, interceptors, microservice transports.
💡 Deep PostgreSQL: schema design, indexing, EXPLAIN ANALYZE, zero-downtime migrations, database-per-service pattern.
💡 Real microservices experience — RPC + pub/sub, message brokers, idempotency, eventual consistency, saga/outbox. Not a monolith split into folders.
💡 Production blockchain (MUST-HAVE) — HD wallets (BIP32/BIP39), smart contracts, ABI, multichain, on-chain transactions with real user funds. ethers.js / viem / @solana/web3.js.
💡 AI-driven workflow (MUST-HAVE) — you use Claude, Copilot, or Cursor daily. You've built automations or LLM-powered tools, not just prompted ChatGPT for code snippets.
💡 System design skills — you can whiteboard a distributed system and defend every decision to engineers and stakeholders alike.
💡 English Upper-Intermediate. Russian — fluent.

Nice to have:
NATS JetStream (streams, consumers, delivery policies), observability stack (OpenTelemetry, Prometheus + Grafana, pino, distributed tracing), Kubernetes with Helm/Kustomize, fintech domain (PCI DSS, KYC/AML, payment systems), experience mentoring mid-level engineers, React basics for back-office UIs.

What we offer:
✔️ Fully remote — international team, async-friendly culture.
✔️ Two career tracks: grow into Tech Lead or go deep as Staff/Principal IC. Your call.
✔️ Real architectural ownership — not ticket execution. You shape how the platform evolves.
✔️ An engineering culture built around AI tools at every stage: analysis, implementation, code review.
✔️ Competitive salary, transparent feedback, low bureaucracy.

📩 Apply if you've shipped systems that handle real money, want ownership over architecture, and treat AI as a multiplier: Доступно в источнике

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