Compiler Performance Engineer

Azul-Systems; Bengaluru; Presencial; INR 1.500.000 - 2.300.000; Jornada completa

Descripción de la vacante

Azul-Systems is seeking a Compiler Performance Engineer to optimize Falcon, Azul Platform Prime's JIT compiler. You will analyze how generated code performs on Java workloads and customer benchmarks, pinpoint bottlenecks, and implement advanced optimizations in the optimizer and code generator.

The role involves working with LLVM-based tooling, improving inlining, loop transformations, and vectorization for x86_64 and AArch64, and writing tests to ensure regressions are avoided.

Formación

• 2+ years of professional experience in compilers, JIT compilers or low level performance engineering.
• Strong C++ design and coding skills.
• Solid understanding of SSA, data flow analysis and loop transformations.
• Ability to read assembly and reason about instruction sequences.

Responsabilidades

• Analyze performance of Java benchmarks and customer workloads; trace gaps to 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 runtime interactions.
• Improve code generation for x86_64 and AArch64.
• Write tests and benchmarks to prove improvements and protect against regressions.
• Contribute changes upstream to LLVM where it makes sense.

Conocimientos

Compiler performance

C++ proficiency

Compiler optimization theory

Assembly reading

Descripción del empleo

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