Senior JIT & Compiler Performance Engineer

OpenKrill; United States; On-site; USD 150,000 - 210,000; Full time

Job summary

Azul Systems seeks a Senior Compiler Performance Engineer to own major performance areas of Falcon, a mature JIT compiler running in production. You will push generated code further, deciding which optimizations matter and delivering measurable speedups on real workloads.

You will join a distributed team of compiler experts with influence on Falcon's next optimizations, including inlining, loop optimizations, and code generation across platforms.

Qualifications

• 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.

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

Skills

C++ design

Compiler optimizations

Performance analysis

JIT compilation

Inlining heuristics

Tools

LLVM

Job description

Azul Systems seeks a Senior Compiler Performance Engineer to own major performance areas of Falcon, a mature JIT compiler running in production. You will push generated code further, deciding which optimizations matter and delivering measurable speedups on real workloads.

You will join a distributed team of compiler experts with influence on Falcon's next optimizations, including inlining, loop optimizations, and code generation across platforms.