Senior Software Engineer (C++) for JVM runtime

What You'll Do

• Design, develop, maintain, and optimize high‑performance, low‑level C++ code for system‑critical JVM runtime components and distributed client‑server communication using gRPC, HTTP/2, or HTTP, ensuring minimal overhead, robustness, and reliability at scale.
  
• Lead the delivery of complex technical projects — from design through production — taking ownership of outcomes and navigating ambiguity under real time and resource constraints.
  
• Contribute to the technical direction of the team: participate in design discussions, challenge and pressure-test technical approaches, and ensure robust solutions through constructive peer review.
  
• Collaborate across teams — represent the team's technical interests in cross-team initiatives and contribute as a peer in design and direction discussions with partner engineering groups.
  
• Mentor junior engineers, sharing expertise through reviews, pairing, and practical guidance that raises the quality bar across the team.
  
• Explore and adopt AI-first workflows — proactively identifying where AI tools can enhance productivity, code quality, and development processes, and helping teammates adopt effective practices.
  
• Perform detailed debugging, profiling, and root-cause analysis of complex software issues.
  
• Develop comprehensive tests to ensure high quality and demonstrate performance improvements.

Wha you'll Need

• Bachelor's degree in Computer Science or a related field, and a minimum of 5 years of experience writing low‑level, high‑performance C++ code.
  
• Solid knowledge of VM and compiler runtime design and implementation; familiarity with JVM internals is highly desirable.
  
• Demonstrated ability to independently lead and deliver complex technical projects on time, managing competing priorities and technical uncertainty.
  
• Experience mentoring engineers and contributing to a team's technical culture and practices.
  
• Strong proficiency with low‑level programming concepts — memory management, pointers, concurrency, and multithreading.
  
• Experience using debuggers, profilers, and performance analysis tools to investigate and resolve complex problems.
  
• Understanding of hardware architectures (e.g. x86, ARM), operating system internals (e.g. Linux, macOS), and languages such as Java or Rust is an advantage.

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/Limassol/Belgrade city center offices. Hybrid or full-remote also possible.

• Work alongside top experts worldwide contributing to the Java ecosystem.