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Compiler Performance Engineer

Azul

Role overview

Qualifications

  • 2+ years of professional experience in compilers, JIT compilers or low level performance engineering
  • Strong C++ design and coding skills
  • Solid understanding of compiler optimization theory: SSA, data flow analysis, loop transformations
  • Ability to read assembly and reason about why one instruction sequence is faster than another

Responsibilities

  • Analyze performance of Java benchmarks and customer workloads, find gaps in generated code and trace them to their root cause in the compiler
  • Implement and improve optimizations in Falcon's middle end and back end: inlining, loop optimizations, vectorization, redundancy elimination, speculative optimizations and their interaction with the runtime
  • Improve code generation for x86_64 and AArch64
  • Write tests and benchmarks that prove the improvement and protect it from regressions

Key facts

Hard skills

Other skills

  • Problem Solving
  • Teamwork

About the company

Azul logo

Azul

Software Development

Azul is the only company 100% focused on Java, delivering the most trusted Java platform to the modern cloud enterprise. We provide the world’s best commercial support for OpenJDK to our customers by prioritizing their success, maintaining our unwavering commitment to innovation and excellence, and advancing Java through community leadership. Millions of Java developers, hundreds of millions of devices, and the world’s most highly regarded businesses - including 27% of the Fortune 100 - trust Azul to power their applications with exceptional capabilities, performance, security, value, and success. https://www.azul.com Twitter: @azulsystems Trademarked - AZUL, Zulu, Azul Zulu, Azul Zulu Prime, Azul Platform Prime, Azul Platform Core, Azul Intelligence Cloud, Azul Analytics Suite, Azul Optimizer Suite are either registered trademarks or trademarks of Azul Systems, registered in the U.S. and elsewhere. All other trademarks belong to their respective owners.

Company details

Company typeSME
IndustrySoftware Development
Company size201 - 500

Links

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Job description

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 Compiler Performance Engineer to make Falcon generate even faster code. This is not a compiler front end role and not a compiler built from scratch: the compiler exists, runs in production at large enterprises, and your job is to find where the generated code is slower than it should be and fix it in the optimizer and code generator.

You will join a distributed team of compiler experts and work on real workloads with direct, measurable impact on customer performance.


What You Will Do (aka Responsibilities)
  • Analyze performance of Java benchmarks and customer workloads, find gaps in generated code and trace them to their root cause in the compiler
  • Implement and improve optimizations in Falcon's middle end and back end: inlining, loop optimizations, vectorization, redundancy elimination, speculative optimizations and their interaction with the runtime
  • Improve code generation for x86_64 and AArch64
  • Write tests and benchmarks that prove the improvement and protect it from regressions
  • Contribute changes upstream to LLVM where it makes sense

    • What You'll Bring (Experience, Skills)
    • 2+ years of professional experience in compilers, JIT compilers or low level performance engineering
    • Strong C++ design and coding skills
    • Solid understanding of compiler optimization theory: SSA, data flow analysis, loop transformations
    • Ability to read assembly and reason about why one instruction sequence is faster than another

    Very Nice to Have
    • Experience with LLVM IR and LLVM optimization passes, or with another optimizing compiler such as HotSpot C2, Graal, GCC or V8
    • Experience with profilers such as perf, VTune or async profiler
    • Knowledge of x86_64 and/or AArch64 microarchitecture
    • Experience with Java, Scala or Kotlin, or with JVM internals
    • MSc or PhD in Computer Science with a compiler or performance focus

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    MR

    Marcus Rivera

    Chief Revenue Officer

    m.rivera@company.com
    linkedin.com/in/marcusrivera
    Unlocked after you apply
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