Tech Lead, Senior Backend Developer – TypeScript, Node.js

• 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 growing platform load
• Make architectural decisions, evaluate trade-offs, and influence engineering standards
• Contribute to AI-powered operational and development workflows
• Maintain and extend React-based back-office admin dashboards for approximately 20% of working time
• 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
• Independently drive complex integrations and partially offload the Tech Lead
• Ship initial features within 30 days, independently drive a complex integration or major feature within 60 days, and make architectural decisions within scope by 90 days

• 5+ years of production backend development experience with TypeScript/Node.js as the primary stack
• 2+ years of production experience with NestJS, including modules, providers, middleware, guards, interceptors, and microservice architecture with custom transports
• Production blockchain experience with 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
• Complex production integration experience with third-party APIs, payment systems, or similar external services
• Knowledge of retries, circuit breakers, and graceful degradation
• Performance engineering experience with profiling, caching, load analysis, and bottleneck identification
• Strong testing discipline with Jest, integration tests using real databases, and microservice testing
• Security-conscious development in fintech and crypto environments
• Technical research skills for evaluating trade-offs, testing hypotheses, and making data-driven architectural decisions
• English proficiency at Upper-Intermediate level
• Fluent Russian
• Nice to have: NATS JetStream, OpenTelemetry, Prometheus, Grafana, pino, Kubernetes, Kustomize/Helm, PCI DSS, GDPR, KYC/AML, payment systems, mentoring, and React basics

• Work fully remote as part of an agile, international team
• Engineering culture encouraging adoption of modern tools and development practices, with 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