Domain Specific Language Engineer

New York, New York, United States March 7, 2026 Jane Street Custom Careers Portal

About the Position

We’re looking to hire a Software Engineer with experience working on programming languages. Our team maintains a framework used at Jane Street for a wide variety of purposes, including financial modeling, risk calculation, and custom alerting. Our system evaluates, in real time and in parallel, a large, irregular, and dynamic graph of calculations, described in a custom ML-like programming language.

This role focuses on improving and maintaining the language and surrounding ecosystem through a wide range of areas: core language features, standard library management, editor integrations, and more. The language is widely used for critical firm functions, yet offers substantial opportunity for extension and improvement. You should be able to balance the work of understanding and supporting existing uses, as well as organizing and driving new functionality.

About You

You have a background in programming languages
You are excited to build out a widely used, but relatively young language
You are eager to work with a wide variety of end users, and to help build tools that empower them
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 [email protected].

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How to Get Hired at Jane Street

Jane Street does not require finance experience — they hire brilliant quantitative thinkers from math, CS, physics, and engineering and train them on markets
OCaml proficiency is a major differentiator for software engineering roles; even basic functional programming experience sets you apart from most applicants

How to apply to Jane Street

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