--- title: 'Senior Software Engineer - Optimizer Hub at Azul' canonical: 'https://feeny.ai/job/senior-software-engineer-optimizer-hub-azul-prague-h290md1tak97' type: 'job' last_seen: '2026-10-13' --- # Senior Software Engineer - Optimizer Hub at Azul - **Company:** Azul - **Location:** Prague, Czech Republic - **Employment:** full-time - **Work type:** hybrid - **Posted:** 2026-10-05 - **Last confirmed live:** 2026-10-13 - **Apply:** https://jobs.lever.co/azul/43962890-1bb7-4c73-b179-ef52701249c3 ## Job description Azul == Java. As the only company focused 100% on Java, Azul is building the Java platform for the modern cloud enterprise. We are reimagining how customers use Java, bringing them the tools and insight they need to deliver faster, more performant, more dependable, and less expensive Java services. It requires experts in many areas — hardcore experts in Java VM internals, application developers with deep knowledge of Java, backend and frontend developers, performance engineers, etc. Come join one of the most influential members of the Java and OpenJDK community and help influence the future of Java. ## About the Product Azul Optimizer Hub (OptHub) is a set of services external to the JVM within Azul Platform Prime that run in your cloud or on-premises environment. It consists of two major functions: Cloud Native Compiler separates the heavy lifting of compiling bytecode to optimized machine code from the actual running of Java applications. ReadyNow Orchestrator ensures consistent responsiveness and performance even as instances are brought up and down, and during critical times like a retail rush, start of the gaming day, or market open. ## Your Role As a Senior Software Engineer on the Optimizer Hub team, you will design and build the server-side services that sit at the heart of our JVM performance platform. You will work closely with product managers, performance engineers, and JVM experts to deliver high-quality, scalable backend components. Design, develop, and maintain high-performance Java services including protocols, APIs, data storage, and real-time optimization engines. Build and evolve server-side OptHub components that communicate with the JVM at scale across cloud and on-premises environments. Debug complex distributed systems issues with limited diagnostic data and under performance constraints. Design and implement observability, profiling, and diagnostic tooling to support both internal development and customer-facing deployments. Drive performance analysis and improvement: create benchmarks, interpret profiler output, and act on findings. Participate in design discussions and code reviews, raising the bar for the whole team. ## 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. ## 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. ## 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. [Azul Jobs on Lever](https://jobs.lever.co/azul) ## Other roles at Azul - [IT Intern, AI and Operations](https://feeny.ai/job/it-intern-ai-and-operations-azul-sunnyvale-mn9fw6kf84tc) — Sunnyvale, CA - [Compiler Performance Engineer](https://feeny.ai/job/compiler-performance-engineer-azul-prague-fpxeq2qn9v1g) — Prague, Czech Republic - [Senior Compiler Performance Engineer](https://feeny.ai/job/senior-compiler-performance-engineer-azul-prague-fgm7bthvxxma) — Prague, Czech Republic - [Global Channel Operations Manager](https://feeny.ai/job/global-channel-operations-manager-azul-united-states-m1yzr649vqrg) — United States - [HR Coordinator, nine-month contract](https://feeny.ai/job/hr-coordinator-nine-month-contract-azul-united-kingdom-13f01rgyfmzd) — United Kingdom - [Enterprise Account Executive](https://feeny.ai/job/enterprise-account-executive-azul-bengaluru-qyhfb04jg454) — Bengaluru, India - [Account Executive Sweden](https://feeny.ai/job/account-executive-sweden-azul-sweden-5vr4nmyqdc9b) — Sweden - [Enterprise Account Executive, Azul Prime - (Remote)](https://feeny.ai/job/enterprise-account-executive-azul-prime-remote-azul-san-francisco-bay-area-d6r319e0c9c1) — San Francisco Bay Area, CA - [LLVM Compiler Engineer](https://feeny.ai/job/llvm-compiler-engineer-azul-india-2z3qcdta2ngq) — India - [Staff Compiler Performance Engineer](https://feeny.ai/job/staff-compiler-performance-engineer-azul-prague-0gx4twmbt85w) — Prague, Czech Republic