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Compiler Engineer

Jane Street
🇺🇸New YorkSeniorFull-timePosted June 17, 2026

About the Role

We are looking for an experienced software engineer to work on code generation in the OxCaml compiler, which is open source. OxCaml is Jane Street's variant of the OCaml language, equipped with powerful features for high-performance and parallel programming, with data race freedom guarantees.

This role involves the full cycle of identifying new optimizations, coding, testing, benchmarking, and deployment. You will work across a variety of intermediate representations, including CPS, SSA, and potentially Sea of Nodes. You'll have the opportunity to interact with many different groups and exceptional individuals across Jane Street worldwide.

Requirements

  • Ideal candidate will be super productive: fast at writing correct code
  • Willing to use AI assistance to get changes to production faster
  • Experienced with debuggers (e.g., lldb, gdb) and low-level Linux tools
  • Knowledge of x86-64 and AArch64 architectures at the assembly language and architectural level is a plus
  • Experience on any compiler toolchain is acceptable
  • Knowledge of LLVM would be useful
  • No knowledge of the OCaml or OxCaml languages is required
  • Proven experience managing a team of developers