Description review
Compiler Performance Engineer
Azul · India · back to the listing
HR standards
61/100
needs work
Title ↔ description
83/100
solid
Reads as
Unclear
no confident match
What this role officially is
software developer — ESCO, the EU occupation classification
Software developers implement or program all kinds of software systems based on specifications and designs by using programming languages, tools, and platforms.
Also known as: application developer, application programmer, solutions developer, programmer, software specialist, application software developer
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What the listing never says
- No pay range published. Candidates cannot tell whether applying is worth their time. Pay transparency
- No location or timezone policy stated, so a candidate cannot tell where they may work from. Scope clarity
The listing, marked up
Nothing in the wording of this listing tripped a check. The scores above still judge how complete and coherent it is.
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
Originally posted on Himalayas
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
Originally posted on Himalayas