Senior Backend Engineer

About the Role

We are looking for a Senior Backend Engineer who thinks in systems. You will design and own distributed backend services that operate in mission-critical classified environments — services where correctness, reliability, and auditability are non-negotiable. You will work at the intersection of software architecture, domain modelling, and operational engineering, using TypeScript and modern functional programming patterns as your primary tools.

Requirements

• 5+ years of backend engineering experience in production systems
• Deep TypeScript expertise — type system, generics, conditional types, module patterns
• Strong PostgreSQL experience — schema design, query optimisation, migrations
• Experience designing and implementing distributed systems: event-driven architecture, message queues, eventual consistency
• Familiarity with DDD, CQRS, and event sourcing patterns
• API design skills — REST and/or gRPC in multi-service environments
• Comfortable working under NDA and security clearance conditions
• Fluent Ukrainian or English

Nice to Have

• Experience with EffectTS or other typed functional programming approaches (fp-ts, Zod, io-ts)
• Knowledge of message brokers — Kafka, RabbitMQ, NATS
• Observability experience — structured logging, distributed tracing, metrics
• Background in defence, aerospace, fintech, or other safety-critical domains
• Open-source contributions or published technical writing

What We Offer

• Competitive compensation reviewed twice yearly
• Work on systems that genuinely matter
• Small, senior team — no sprints, no pointless meetings
• Kyiv office; hybrid or remote considered for senior candidates
• Full legal employment, all benefits