Jane Street logo
Jane Street
Verified live 1d ago

Programming Language Engineer

Brief overview

New York, New York, United StatesIn-person
4+ yrsMinimum
153 H-1B approvalsDept. of Labor
53 green cardsCertified filings
Programming language designCompiler developmentLanguage implementationOCamlFunctional programmingOpen-source contributionPerformance optimizationToolchain development

About the company

Jane Street logo
Jane Streetjanestreet.com

Leaders in proprietary trading and technology innovation.

Visa sponsorship history

4 years sponsoring, last filed FY2026

Data powered by U.S. Department of Labor. This does not guarantee sponsorship for this specific role.
153H-1B approved
98%approval rate
93new H-1B hires
53PERM certified
$300,000median wage / yr
H-1B Petition ApprovalsVisas USCIS actually granted: the strongest sign the company sponsors.
202342
202451
202556
20264
LCA Certified ApplicationsAn early filing step, not a visa approval: it signals intent, not confirmed sponsorship.
20239
20247
202514
20269
Green Card (PERM) FilingsCertified green card filings: a long-term commitment to international hires.
20239
202421
202523
Top sponsored roles
Software EngineerTraderProduction EngineerTrading Desk Operations EngineerSOFTWARE ENGINEER
Sponsored employees from
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Job description

About the Position

We're looking to hire an experienced Software Engineer with a background working on programming languages to join us. Jane Street's OCaml Language team focuses on improving OCaml as a foundation for our ever-growing technology stack, in collaboration with the greater OCaml community. We work on many different aspects of the language, aiming to make it easier for developers to express their ideas in OCaml, to improve the performance of the generated code, and to make the OCaml compiler itself faster and easier to use. 

Over the years, we’ve extended the type system with support for novel language features, re-engineered the optimizer ground-up, and added feedback-directed optimization. We also extend and enhance the surrounding toolchain, working on tools for profiling, debugging and generating documentation. The vast majority of our work is open-source, and we upstream as much as we can to the mainstream OCaml compiler.

About You

For this specialized role within the OCaml Language team, we are seeking candidates with multiple years of experience in practical language design and implementation in an industrial-strength implementation. Research experience and publications in programming languages is a plus, but not a requirement. No previous experience with OCaml or functional programming languages is required.

If you're a recruiting agency and want to partner with us, please reach out to agency-partnerships@janestreet.com.

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