Jane Street

Trades stocks, bonds and funds as a market maker

Compiler Engineer

Systems Software EngineeringConfirmed live in the last 24 hours

Full-timeNew York, NY, USA$300k /yrIn-person

About the Job

Requirements

Experience working on a compiler toolchain.
Experience with debuggers such as LLDB or GDB and low-level Linux tools.
Knowledge of x86-64 and AArch64 architectures at the assembly-language and architectural level is useful but not required.
Experience managing a team of developers.
No prior knowledge of OCaml or OxCaml is required.

Responsibilities

Work on code generation in the open-source OxCaml compiler.
Identify new compiler optimizations, write code, test, benchmark, and deploy changes across the full development cycle.
Work across intermediate representations including CPS, SSA, and potentially Sea of Nodes.
Interact with groups and individuals across Jane Street worldwide.

Desired Qualifications

Use AI assistance to accelerate changes into production.
Knowledge of LLVM.
Knowledge of x86-64 and AArch64 architectures at the assembly-language and architectural level.
Enjoy managing a team of developers alongside normal technical work.

About the Position

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. There will be the opportunity to work across a wide variety of intermediate representations, including CPS, SSA, and maybe even Sea of Nodes. This role will also allow you to interact with many different groups and exceptional individuals across Jane Street worldwide.

About You

The ideal candidate will be super productive: fast at writing correct code, willing to use AI assistance to get changes to production faster, and experienced with debuggers (e.g., lldb, gdb) and low-level Linux tools. Having knowledge of x86-64 and AArch64 architectures at the assembly language and architectural level is a plus.

We are happy to consider candidates with experience on any compiler toolchain, although knowledge of LLVM would be useful. No knowledge of the OCaml or OxCaml languages is required–we can teach you what you need to know.

We are particularly interested in candidates who have proven experience managing a team of developers, and who would enjoy doing that alongside their normal technical work.

If you're a recruiting agency and want to partner with us, please reach out to [email protected]

Min salary: 300,000
Max salary: 300,000

About the Company

Jane Street

Trades stocks, bonds and funds as a market maker

Jane Street trades stocks, bonds, options, and exchange-traded funds with its own money as a market maker, a firm that constantly quotes prices to buy and sell so other investors can trade whenever they want. In 2025, it made more money from trading than JPMorgan Chase or Goldman Sachs, the biggest trading banks on Wall Street. Its traders, researchers, and engineers build computer-driven strategies that trade on exchanges and other venues around the world, and it also trades directly with large institutional clients. It earns the small gap between buying and selling prices across huge volumes, plus gains on positions it holds for minutes to days. Jane Street was founded in 2000 and is based in New York.

Company size: 1,001-5,000
Company stage: Debt Financing
Total funding: $90.8B
Headquarters: New York City, New York
Founded: 2000

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