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Software Engineer, LLVM Compiler

Meta· Engineering
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Hybrid (Bellevue, WA)$154k - $217kFull-timePosted 1mo ago

About the role

Software engineer to join the MTIA LLVM Compiler team, building a production LLVM-based compiler stack for Meta's custom silicon AI accelerators. Responsibilities span designing and implementing LLVM compiler passes, IR transformations, and performance-oriented optimizations for ML workloads, targeting ML accelerator backends and hardware units.

Responsibilities

  • Design and implement LLVM compiler passes, including optimization, lowering, and code generation stages targeting ML accelerator backends
  • Analyze and improve compiler-generated code quality through profiling, benchmarking, and performance instrumentation across ML workloads
  • Develop and maintain LLVM IR transformations that enable efficient mapping of ML computation graphs to hardware execution units
  • Collaborate with hardware architecture and ML framework teams to define compiler interfaces and ensure correctness of generated code on custom silicon targets
  • Identify and resolve correctness and performance regressions through systematic debugging, root cause analysis, and targeted fixes in the compiler pipeline
  • Own the technical design of compiler components, evaluating trade-offs between compilation time, runtime performance, and code size for ML inference and training workloads
  • Build and improve automated testing frameworks and benchmarking infrastructure to validate compiler correctness and track performance across hardware generations
  • Drive adoption of compiler best practices and coding standards across the team, contributing to documentation and engineering process improvements
  • Partner with ML engineers and researchers to understand model-level performance requirements and translate them into actionable compiler optimization strategies
  • Mentor other engineers on compiler internals, LLVM architecture, and ML-specific code generation techniques

Qualifications

  • Bachelor's degree in Computer Science, Computer Engineering, relevant technical field, or equivalent practical experience
  • 5+ years of experience developing compilers or code optimization software, with demonstrated technical leadership
  • Proficiency in C++ or Rust with experience in large-scale software development, debugging, testing, and performance analysis
  • Experience working within the LLVM/MLIR compiler infrastructure or a comparable production compiler codebase (e.g., GCC, MSVC)
  • Track record of designing and delivering significant compiler features or optimization passes end-to-end
  • Experience driving cross-team technical initiatives and influencing roadmap decisions
  • Experience crossing multi-disciplinary boundaries (hardware, ML frameworks, runtime systems) to drive optimal system-level solutions
  • Experience in AI framework development or accelerating deep learning models on hardware architectures
  • Demonstrated ability to mentor engineers and raise the technical bar of a team

Skills

Required:LLVM/MLIRC++ or RustCompiler design and optimization

Benefits

  • Benefits information available onsite in posting
  • Refer to Meta benefits page for comprehensive offerings
Last updated Oct 23, 2026. Interested? Apply on the company site.

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