Compiler Engineer

About this role

Jane Street seeks an experienced compiler engineer to develop code generation optimizations for OxCaml, their high-performance OCaml variant. The role encompasses the full optimization lifecycle—from identifying improvements through testing and deployment—working with intermediate representations like CPS and SSA.

What you'll do

• Design and implement code generation optimizations for the OxCaml compiler
• Work with intermediate representations including CPS, SSA, and other compiler abstractions
• Execute full development cycle: identify optimizations, code, test, benchmark, and deploy
• Debug and profile compiler behavior using low-level tools and debuggers
• Collaborate with teams across Jane Street on compiler improvements
• Potentially mentor and manage a team of developers

What they're looking for

• Compiler design and code generation
• x86-64 and AArch64 assembly language
• LLVM or other compiler toolchain experience
• Debuggers (lldb, gdb) and Linux tools
• Performance benchmarking and optimization
• AI-assisted development tools
• Team management and mentoring
• Fast, correct coding practices

Benefits

• Work on open-source compiler technology
• Collaborate with exceptional engineers globally
• Opportunity to manage and lead a development team
• No OCaml/OxCaml knowledge required—training provided