Software Engineer, LLVM Compiler

Job description

We are seeking a software engineer to join the MTIA LLVM Compiler team, working on the compiler toolchain for Meta's custom silicon AI accelerators. You will be part of our efforts to architect, design, and implement a production compiler stack targeting next-generation deep learning hardware. The team includes compiler, machine learning, firmware, and ASIC experts, and the work spans from compiling PyTorch models through LLVM-based intermediate representations down to optimized binaries for hardware accelerator blocks.

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 Demonstrated ongoing AI skill development (e.g., prompt/context engineering, agent orchestration) and staying current with emerging AI technologies Experience working closely with hardware architectures such as SIMD, GPU, RISC-V, and AI accelerators
• Familiarity with a mainstream ML framework such as PyTorch, TensorFlow, or MLIR-based ML toolchains Experience contributing to the upstream LLVM or MLIR projects Experience with deep learning model compilation, graph compilers, or ML-specific optimization techniques (e.g., operator fusion, tiling, quantization-aware compilation) Experience with hardware-specific optimization for accelerators, GPUs, or DSPs
• Demonstrated ability to integrate AI tools to optimize/redesign workflows and drive measurable impact (e.g., efficiency gains, quality improvements) Experience working and communicating cross-functionally in a team environment Experience adhering to and implementing responsible, ethical AI practices (e.g., risk assessment, bias mitigation, quality and accuracy reviews) Experience with machine-code generation and back-end compiler optimizations such as instruction selection, register allocation, and instruction scheduling