About this role
Key Requirements
- 5+ years of strong professional Java development experience, with a focus on backend and server-side systems.
- Deep understanding of JVM internals: memory management, garbage collection, JIT compilation, and threading.
- Experience building and operating distributed systems and microservices in production.
- Proficiency with concurrency, low-latency design, and performance optimization techniques in Java.
- Experience with cloud platforms (AWS, Azure, or GCP) and container orchestration (Kubernetes).
- Ability to design clean APIs and protocols; comfort working close to the metal when needed.
- Strong debugging skills — you can track down hard-to-reproduce production issues with limited data.
Nice to Have
- Familiarity with JVM-adjacent technologies: JVM agents, JVMTI, bytecode manipulation (ASM, Javassist), or OpenJDK internals.
- Background in performance engineering, profilers (async-profiler, JFR, YourKit), or runtime observability.
- Experience with gRPC, Protocol Buffers, WebSockets or high-throughput messaging systems.
- Experience with process metrics, system observability and CI/CD pipelines.
- Prior work in a Java platform, middleware, or infrastructure product company.
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We Offer
- Referral Program — help us grow with great people.
- Premium IT equipment — MacBook Pro or hardware of your choice.
- 5 weeks of holidays + 5 sick days.
- Flexible working hours; full remote possible.
- Prague city center offices.
- Work alongside top experts worldwide contributing to the Java ecosystem.