Senior Software Engineer (Java)

TL;DR

Senior Software Engineer (Java): Designing and building server-side services for a JVM performance platform with an accent on high-performance Java services, distributed systems, and real-time optimization engines. Focus on solving complex distributed systems issues, implementing observability tooling, and driving performance analysis.

Location: Hybrid (Prague), full remote possible

Company

hirify.global is a specialized company focused on building a modern Java platform for cloud enterprises, with a deep emphasis on JVM internals and performance optimization.

What you will do

• Design and maintain high-performance Java services, protocols, APIs, and real-time optimization engines.
• Develop server-side OptHub components that communicate with the JVM at scale across cloud and on-premises environments.
• Debug complex distributed systems issues under performance constraints.
• Implement observability, profiling, and diagnostic tooling for internal and customer use.
• Drive performance analysis by creating benchmarks and interpreting profiler output.
• Participate in design discussions and code reviews to maintain high engineering standards.

Requirements

• 5+ years of professional Java development experience focused on backend and server-side systems.
• Deep understanding of JVM internals, including memory management, GC, JIT compilation, and threading.
• Experience building and operating distributed systems and microservices in production.
• Proficiency with concurrency, low-latency design, and performance optimization in Java.
• Experience with cloud platforms (AWS, Azure, or GCP) and Kubernetes.
• Strong debugging skills for tracking hard-to-reproduce production issues.

Nice to have

• Familiarity with JVM agents, JVMTI, or bytecode manipulation (ASM, Javassist).
• Experience with C/C++ for analyzing JVM source or performance-critical native code.
• Background in performance engineering and profilers (async-profiler, JFR, YourKit).
• Experience with gRPC, Protocol Buffers, or high-throughput messaging systems.

Culture & Benefits

• Premium IT equipment, such as MacBook Pro or hardware of your choice.
• 5 weeks of paid holidays and 5 sick days.
• Flexible working hours with full remote options.
• Modern offices located in Prague city center.
• Opportunity to work with top global experts contributing to the Java ecosystem.