--- title: 'Senior Software Engineer (C++) for JVM runtime at Azul' canonical: 'https://feeny.ai/job/senior-software-engineer-c-for-jvm-runtime-azul-prague-trt12efa09ww' type: 'job' last_seen: '2026-11-10' --- # Senior Software Engineer (C++) for JVM runtime at Azul - **Company:** Azul - **Location:** Prague, Czech Republic - **Employment:** full-time - **Work type:** hybrid - **Posted:** 2026-06-10 - **Last confirmed live:** 2026-11-10 - **Apply:** https://jobs.lever.co/azul/5c22d4e5-2ad0-4017-8a15-50212e0cce35 ## Job description We are seeking a highly skilled **Senior Software Engineer** to join our team developing Azul Prime, an award-winning enhanced build of OpenJDK designed for superior application performance, responsiveness, and efficiency. In this role, you will drive the development and optimization of the virtual machine (VM), contributing to garbage collection, HotSpot runtime, compiler runtime, remote compilation, and many other advanced challenges. ## 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. Employment at Azul is contingent upon the completion of reference and background checks. ## About Azul ## Company Overview - **One-liner**: Azul is the largest company 100% focused on Java and the JVM, providing the world’s most trusted Java platform for cloud and AI-first enterprises. - **Entity Type**: Private (Venture-backed; latest funding round: Private Equity Round in November 2025) - **Headquarters**: Sunnyvale, California, United States - **Founded**: 2002 - **Founders**: Scott Sellers (CEO, President, Co-Founder) and Gil Tene (CTO, Co-Founder) ## Core Business - **Primary Industries**: Software Development, Enterprise Java Infrastructure, Cloud Computing - **Target Customers**: B2B – Enterprise, Fortune 100 companies, financial services, retail, telecommunications, manufacturing, and public sector - **Mission/Purpose**: “To make Azul the heart of every modern cloud enterprise by prioritizing our customers’ success, maintaining our unwavering commitment to innovation and excellence, and advancing Java through community leadership.” ## Products & Services - **Azul Platform Prime (formerly Zing)**: High-performance, low-latency JVM runtime for mission-critical applications, with advanced garbage collection and diagnostics. - **Azul Platform Core (formerly Zulu)**: Free, open-source, commercially supported Java build (OpenJDK) for general-purpose workloads. - **Azul Intelligence Cloud**: Analytics suite that provides insights from production Java runtime data to boost DevOps efficiency. - **Azul Optimizer Suite**: Tools for tuning and optimizing Java application performance. ## Market Standing - **Valuation/Market Cap**: Not disclosed (private company) - **Key Metric**: - Annual Revenue: $55 million (as of most recent data) - Total Funding: $177.7 million across 7 rounds (including recent PE round in Nov 2025) - **Notable Investors**: Series E (2006) with 5 investors; recent Private Equity round (2025) with 1 investor; earlier rounds include Series C ($36M), Series D ($30M), Series E ($42M). Specific names not fully detailed in available data. - **Growth Signals**: - Headcount: 270 employees (+9.9% YoY, +50 people) - LinkedIn followers: 48,997 (+50.9% yearly growth) - 36% of Fortune 100, 10 of world’s top 10 banks, and brands like BMW, Mastercard, Salesforce, Workday are customers. - Offices in 8 global locations; channel partners in 88 countries. ## Competitive Advantages - **Largest independent Java engineering team** (second only to Oracle) – 100% focused on Java. - **Deep expertise in JVM and runtime optimization** – proven by customers like top banks and Fortune 100 companies. - **Commercial open-source model** – combines enterprise-grade support with community-driven innovation. - **Proprietary technologies** (e.g., C4 garbage collector, purpose-built for low latency). ## Strategic Focus - **Cloud and AI-first world**: Positioning Java as the core runtime for modern cloud enterprises. - **Expanding Intelligence Cloud**: Leveraging production runtime data to improve DevOps and application performance. - **Global reach**: Growing channel partnerships and presence in 14 countries, with remote/hybrid roles to attract top talent. ## Why Work Here - **Culture**: “Respect, professionalism, innovation, diversity, inclusion, and maniacal focus on customers.” Rated 4.3/5 on employer reviews (78 reviews). - **Work Model**: Hybrid and remote options available across many roles (e.g., remote in US, Canada, Europe, etc.). - **Perks**: Company equity, generous parental leave, dental insurance, Flexible Spending Account (FSA), 401(K). Offices in Sunnyvale, Bengaluru, Dallas, Limassol, Prague, Singapore, Sydney, Yerevan. - **Engineering Culture**: Focus on Java, JVM, compilers, and runtime performance – appealing to system-level engineers and open-source contributors. ## Sources 1. [Azul About Page](https://www.azul.com/about/) 2. [Azul Careers Page](https://www.azul.com/careers/) 3. [Azul on LinkedIn](https://linkedin.com/company/azul-systems) 4. [Azul on Built In](https://builtin.com/company/azul) 5. 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