Senior Compiler Performance Engineer

Azul
Bangalore, India
Remote

Who this role is best for

Aimed at experienced compiler engineers who can drive optimization strategies and work within a distributed team.

Best fit for

  • Experienced compiler engineers with a focus on optimization and performance validation in production environments
    — “Falcon is mature and runs in production at large enterprises”
  • Individuals familiar with LLVM and capable of upstream contributions when relevant
    — “Contribute to upstream LLVM where it makes sense”

Things to consider

  • The role demands ownership of end-to-end performance improvements, not just isolated tasks
    — “Own performance of Falcon for a set of workloads or an optimization area end to end”
  • Candidates must be prepared for ongoing mentorship and code review responsibilities
    — “Review code, mentor engineers on the team and raise the bar for performance methodology”

How to stand out

  • Highlight measurable performance gains in prior compiler optimization work
    — “Proven track record of delivering compiler optimizations with measurable performance impact”
  • Demonstrate experience with JIT compilers for managed languages
    — “Experience with JIT compilers for managed languages: HotSpot C2, Graal, V8, .NET RyuJIT or similar”
  • Showcase expertise in x86_64 or AArch64 microarchitectures
    — “Deep knowledge of x86_64 and/or AArch64 microarchitecture”
  • Emphasize skills in analyzing and interpreting generated assembly code
    — “Strong performance analysis skills: profilers, hardware counters, reading and reasoning about generated assembly”
Pace · SteadyCollaboration · HighAutonomy · HighDecision Impact · Company

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • owning performance of Falcon for a set of workloads or an optimization area
  • designing and implementing new optimizations
  • driving code generation quality
  • investigating complex performance issues
Typical background
5+ years of professional experience developing optimizing compilers or JIT compilers

Skills & requirements

Required

Optimizing CompilersJIT CompilersC++ Design And CodingCompiler Optimization TheoryPerformance AnalysisLLVM Optimization PassesJIT Compilers For Managed LanguagesX86_64 And Aarch64 MicroarchitectureJVM Internals

Preferred

LLVM Commit AccessPhd In Computer Science

Stack & domain

Optimizing CompilersJIT CompilersC++LLVM Optimization PassesCode GenerationX86_64Aarch64JVM InternalsGarbage CollectionDeoptimizationProfilingTeamworkMentorshipTechnical Leadership

About the role

Original posting from Azul via Lever

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.

What You Will Do (aka Responsibilities):

  • 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
  • Contribute to upstream LLVM where it makes sense

What You'll Bring (Experience, Skills):

  • 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

Nice to Have:

  • 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

Source: Azul careers (Lever)

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