Senior Software Engineer (API Platform) - Poland

5+ years of experience as a backend or platform engineer working on large-scale, distributed systems Experience with at least one modern server-side stack (e.g., Ruby/Rails, Python, Java, Kotlin, Node, etc.) Proven track record of designing and implementing APIs (REST and/or gRPC), including versioning and handling breaking changes Hands-on experience with production observability and reliability Practical knowledge of caching, rate limiting, and performance tuning for networked services Strong communication skills and comfort working in a remote-first, asynchronous environment Fluency in both Polish and English

Design and build platform services and tooling for API design, documentation, discovery, observability, and lifecycle management Define and roll out conventions for resource modeling, versioning, error handling Implement and improve cross-cutting capabilities like API monitoring, logging, rate limiting, caching, and throttling Participate in system design and architectural discussions for performance, scalability, reliability, and distributed systems Mentor other engineers in API design, distributed systems, and platform thinking