Build Infrastructure Engineer

Anthropic • San Francisco, CA

81d • $315,000 - $405,000

About The Position

A systems-level engineer specializing in build infrastructure and low-level systems optimization, with expertise in maintaining and improving non-trivial C/C++ builds and other host level systems. This role requires deep technical knowledge of compilation processes, hardware-software interfaces, build systems, and the ability to debug and optimize at the system level.

Requirements

• 5+ years of experience in systems programming or infrastructure roles
• Often comes from backgrounds in: HPC, game engine development, embedded systems, OS, or compiler teams
• Strong debugging mindset with patience for complex, multi-layered issues
• Self-directed problem solver who can navigate large, legacy codebases

Nice To Haves

• Basic understanding of deep learning frameworks (PyTorch, Jax) from a systems perspective
• Understanding of tensor operations
• Experience with distributed training infrastructure is a plus

Responsibilities

• Expert-level proficiency with build/packaging systems (Nix, pip, uv, CMake, Bazel, Make, etc.)
• Nix experience in particular is a huge plus
• Experience managing complex builds and interacting in non-trivial ways with CI
• Skilled in diagnosing and resolving linking issues, symbol resolution problems, and toolchain/ABI incompatibilities
• Strong C/C++ debugging skills, especially nice if in embedded systems or in dealing with cross compiling/linking
• Comfortable with system calls, POSIX APIs, and kernel interfaces
• Experience with toolchain debugging tools like readelf, bloaty, c++filt, nm, etc.
• Basic knowledge of compilers (understanding things like passes, having multiples levels of IR, what kinds of operations are done on it, etc.)
• Experience with cross-compilers (compiling code for target devices)
• Experience with detailed compiler flags optimization and custom toolchain configuration
• Understanding of linking processes, object file formats (ELF, DWARF), and ABI compatibility

Benefits

• Competitive compensation and benefits
• Optional equity donation matching
• Generous vacation and parental leave
• Flexible working hours
• Lovely office space in which to collaborate with colleagues

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Industry: Publishing Industries
• Education Level: Bachelor's degree