4d ago
New

Senior Compiler Performance Engineer

CzechiaCzechia·PragueEmployee - Full-time - Regularsenior
Other
0 views0 saves0 applied
Apply Now

Quick Summary

Overview

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,

Technical Tools
Other

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. Come join one of the most influential members of the Java and OpenJDK community and help influence the future of Java.

Falcon is the optimizing just in time (JIT) compiler in Azul Platform Prime. It compiles hot Java bytecode into highly optimized machine code and delivers Java performance that standard JVMs do not reach. Falcon is built on LLVM.

We are looking for a Senior Compiler Performance Engineer to own major performance areas of Falcon. This is not a compiler front end role and not a compiler built from scratch: Falcon is mature and runs in production at large enterprises. Your job is to push its generated code further, deciding which optimizations matter, designing them and delivering measurable speedups on real workloads.

You will work in a distributed team of compiler experts, with direct influence on what Falcon optimizes next.

  • Own performance of Falcon for a set of workloads or an optimization area end to end: analysis, design, implementation, validation
  • Design and implement new optimizations and improve existing ones in the middle end and back end: inlining heuristics, loop optimizations, vectorization, escape analysis, speculation and deoptimization, GC barrier and runtime call optimization
  • Drive code generation quality on x86_64 and AArch64, including bringing Falcon to new hardware platforms
  • Investigate complex performance issues reported by customers and turn findings into compiler improvements
  • Review code, mentor engineers on the team and raise the bar for performance methodology
  • 5+ years of professional experience developing optimizing compilers or JIT compilers
  • Strong C++ design and coding skills in large codebases
  • Proven track record of delivering compiler optimizations with measurable performance impact
  • Deep knowledge of compiler optimization theory and its practical tradeoffs: compile time, code size, correctness
  • Strong performance analysis skills: profilers, hardware counters, reading and reasoning about generated assembly
  • Significant experience with LLVM optimization passes or code generation; LLVM commit access is a plus
  • Experience with JIT compilers for managed languages: HotSpot C2, Graal, V8, .NET RyuJIT or similar
  • Deep knowledge of x86_64 and/or AArch64 microarchitecture
  • Experience with JVM internals: garbage collection, deoptimization, profiling
  • PhD in Computer Science or significant research experience in compilers
  • Opportunity to make a high impact at a growing, global company
  • Work alongside top experts worldwide contributing to the Java ecosystem
  • 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
  • Prague / Limassol / Belgrade city center offices OR hybrid/full-remote - UP TO YOU
  • Competitive compensation

    • Location & Eligibility

    Where is the job
    Prague, Czechia
    Hybrid, some on-site time required
    Who can apply
    CZ

    About this job

    Who can apply
    Czechia
    Posted
    4 days ago
    Employer
    has 20 open jobs on Jobera in 6 countries.

    Listing Details

    Posted
    October 12, 2026
    First seen
    October 12, 2026
    Last seen
    October 16, 2026

    Posting Health

    Days active
    3
    Repost count
    0
    Trust Level
    62%
    Scored at
    October 16, 2026

    Signal breakdown

    freshnesssource trustcontent trustemployer trust
    Apply for this position

    Azul Systems develops and distributes runtimes (JDK, JRE, JVM) for executing Java-based applications. It is the largest company 100% focused on Java and the JVM.

    Employees
    201-500
    Domain
    Jobs
    View 20 jobs
    View company profile

    4 other jobs at

    View all →

    Explore open roles at .

    Staff Compiler Performance Engineer
    Employee - Full-time - Regular
    Senior Compiler Performance Engineer
    Employee - Full-time - Regular
    Compiler Performance Engineer
    Employee - Full-time - Regular
    IT Intern, AI and Operations
    USD 25 per hour
    Intern

    Similar Other jobs

    View all →
    Gestionnaire des moyens généraux et logistique (H/F)
    Financieel administratief medewerker - Haarlem
    Februaristage jeugdzorgwerker hbo | Open behandelgroep KomPact | 30 uur | Venlo
    Februaristage jeugdzorgwerker hbo | Dagbehandeling de Dondersteen | 32 uur | Deventer
    Februaristage jeugdzorgwerker hbo | 24-32 uur | Open behandelgroep voor hechting- en traumaproblematiek | Horn
    Septemberstage Jeugdzorgwerker mbo en hbo | 24-32 uur | JeugdzorgPlus en Open groepen Deurne
    Newsletter

    Stay ahead of the market

    Get the latest job openings, salary trends, and hiring insights delivered to your inbox every week.

    A
    B
    C
    D
    Join 12,000+ marketers

    No spam. Unsubscribe at any time.

    Senior Compiler Performance Engineer
    Apply Now