Lead/Senior Backend Developer – TypeScript, Node.js

Job Description:

  • Own backend architecture across two large-scale microservice platforms with 30+ and 25+ services
  • Lead integrations with payment providers, card issuers, blockchain networks, and third-party APIs
  • Take responsibility for integration reliability in production
  • Identify bottlenecks, design caching strategies, optimize database queries, and support platform scalability
  • Make architectural decisions, evaluate trade-offs, and influence engineering standards and technical direction
  • Partially offload the Tech Lead through independent technical decision-making
  • Build and improve AI-powered operational and development workflows
  • Contribute approximately 20% of time to React-based back-office admin dashboards
  • Own features end-to-end from planning and architectural design through implementation, testing, monitoring, and improvement
  • Collaborate with Product, QA, Frontend, Mobile, and other cross-functional teams
  • Produce technical documentation, participate in code reviews, and share knowledge
  • Participate in a shared on-call rotation of approximately one week per month
  • Deliver first production features within 30 days
  • Independently drive a complex integration or major feature within 60 days
  • Make architectural decisions and influence technical direction within 90 days

Requirements:

  • 5+ years of production experience in backend development with TypeScript/Node.js as the primary stack
  • 2+ years with NestJS in production, including modules, providers, middleware, guards, interceptors, and microservice architecture with custom transports
  • Production blockchain experience involving on-chain transactions, multiple networks, and real user funds
  • Understanding of HD wallets (BIP32/BIP39), smart contracts, ABI, ERC-20/SPL tokens, and account-based versus UTXO models
  • Experience with ethers.js, viem, and solana/web3.js
  • Active daily use of AI tools such as Claude, Copilot, or Cursor
  • Experience optimizing business or organizational processes with AI/LLMs
  • Deep PostgreSQL expertise, including schema design, indexing, query optimization, zero-downtime migrations, and database-per-service patterns
  • Hands-on microservices experience with RPC, pub/sub, message brokers, idempotency, eventual consistency, saga/outbox patterns
  • System design experience, including service decomposition, API contracts, data-flow architecture, and capacity planning
  • Production experience with complex third-party API, payment-system, or similar external-service integrations
  • Performance engineering experience, including profiling, caching, load analysis, and bottleneck identification
  • Strong testing discipline with Jest unit tests, integration tests using real databases, and microservice testing
  • Security-conscious approach appropriate for fintech and crypto systems handling real user funds
  • Technical research skills for evaluating trade-offs, testing hypotheses, and making data-driven architectural decisions
  • English proficiency at Upper-Intermediate level
  • Fluent Russian language
  • Nice to have: NATS JetStream, OpenTelemetry, Prometheus, Grafana, pino, Kubernetes/Kustomize/Helm, PCI DSS, GDPR, KYC/AML, payment systems, mentoring, and React basics

Benefits:

  • Work fully remote as part of an agile, international team
  • Engineering culture encouraging adoption of modern tools and development practices
  • Real influence over technologies, workflows, and technical decisions
  • Two career tracks: Tech Lead or Staff/Principal IC
  • Career progression and professional development
  • Competitive salary range based on individual performance review
  • Transparent feedback and culture valuing ownership, open dialogue, and visible impact
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