Objective Caml jobs

New York, New York

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10d ago

About the Position Our goal is to give you a real sense of what it's like to work at Jane Street full time while also providing a truly unparalleled educational experience. As an intern, you are paired with full-time employees who act as mentors, collaborating with you on real-world projects we actually need done. As a Software Engineering intern, you'll learn how we use OCaml (our primary development language) in our day to day work, and gain exposure to the libraries and tools that are foundat

Full-time

Software Engineer / Writer

New York, New York

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3d ago

About the Position We're looking to hire a programmer-who-writes, or a writer-who-codes. Here are the kinds of things we'd like to have this person work on: Documentation. We've always believed that developers should spend time and effort documenting their own code, but at the same time, a great writer with a feel for the technology can raise the level of quality in a way that few developers can. Establishing a culture of great docs is especially important as we grow. Building tools that support

Full-time

Software Engineer

New York, New York

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4d ago

Full-time

Production Engineer

New York, New York

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5d ago

About the Position We are hiring Production Engineers in our New York office. Jane Street Production Engineers are software developers who spend time both developing software and also providing high-quality support for software systems that are critical to Jane Street's trading business. Many of our Production Engineers are embedded in various software teams; others are in standalone teams. In both situations we work alongside application developers with a common goal of creating and running gre

Full-time

Software Engineer

New York, New York

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19d ago

About the Position We're looking for Software Engineers who want to help us design and build the systems and tools that run the firm. You'll find Software Engineers in all parts of Jane Street, solving real problems in critical areas ranging from trading desks to our accounting team, as well as building foundational infrastructure, whether that means implementing network monitoring or risk models. We are big believers in functional programming and, using OCaml, a statically -typed functional pro

Full-time

Hardware Engineer (FPGA/ASIC)

New York, New York

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11d ago

About the Position Our goal is to give you a real sense of what it's like to work at Jane Street full time while also providing a truly unparalleled educational experience. As an intern, you are paired with full-time employees who act as mentors, collaborating with you on real-world projects we actually need done. In this internship, you'll learn how we use tools to make programming faster, more pleasant, and more reliable. We apply these same principles to our hardware engineering work, and we'

Full-time

Low-Latency Engineer

New York, New York

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10d ago

About the Position We are looking for a Software Engineer with experience in high-performance, low latency systems. You'll work closely with our quantitative researchers and developers, taking a holistic approach to design and optimize our fast-trading systems. We build systems primarily in OCaml with only small amounts of C and C++, but you don't need any experience with OCaml in particular (we can teach it to you) or knowledge of the financial markets. The most important qualification is exper

Full-time

Programming Language Engineer

New York, New York

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10d ago

About the Position We're looking for Software Engineers with a background in programming languages to join one of our PL-focused teams at Jane Street. Programming languages work at Jane Street spans a wide variety of different areas: Language design and type systems. Designing language features and stronger type-level guarantees that let our developers express more of what they mean, and catch more mistakes at compile time. Compilers and optimization. Investing in optimization, code generation,

Full-time

Data Engineer

New York, New York

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8d ago

About the Position Our goal is to give you a real sense of what it's like to work at Jane Street full time. Over the course of your internship, you will explore ways to approach and solve exciting problems within your field of interest through fun and challenging classes, interactive sessions, and group discussions - and then you will have the chance to put those lessons to practical use. As a Data Engineering intern, you'll learn how we turn messy, real-world data into reliable foundations for

Full-time

Formal Methods Engineer

New York, New York

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Today

About the Position We're looking for software engineers and researchers to establish a new Formal Methods team at Jane Street. With the emergence of agentic programming, we think formal methods will play a major role in providing feedback for agents and helping validate agent-generated code. Our vision is to make formal methods as useful a tool for building software as type systems are for us today, both by leveraging existing tools and technology, and pursuing novel approaches. We're looking

Full-time

ASIC Physical Design Engineer

New York, New York

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25d ago

About the Position We are looking to hire an ASIC Physical Design Engineer to help us design, test, and deploy advanced hardware. As part of our Ultra Low Latency team, you'll have the opportunity to collaborate with people in areas across the firm, including trading, networking, and research infrastructure. This isn't a traditional PD role. We're a small team where everyone works across the chip design process, and we expect our PD engineers to lead with physical design expertise but think like

Full-time

Linux Engineer

New York, New York

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25d ago

About the Position Linux Engineers work with the critical infrastructure underlying the rest of the firm's technology. Members of this group are hard-working Systems Engineers, Administrators and Programmers, tasked with maintaining and improving the platform that powers Jane Street's production trading systems. Our mix of in-house and open source software allows you to investigate and innovate at every level. On any given day, you could be debugging kernel performance, developing management too

Full-time

Windows Engineer

New York, New York

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3d ago

About the Position Our goal is to give you a real sense of what it's like to work at Jane Street full time while also providing a truly unparalleled educational experience. As an intern, you are paired with full-time employees who act as mentors, collaborating with you on real-world projects we actually need done. As a Windows Engineering intern, you'll work side by side with full-timers in the IT department to learn how we design, deploy, secure, and maintain the automation tools and key infras

Full-time

Compiler Engineer

New York, New York

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Today

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 interme

Full-time

Software Engineer

New York, New York

•

Today

Full-time

Meet us at ICFP 2026!

Indianapolis, Indiana

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Yesterday

We're looking forward to #ICFP2026 in Indianapolis! OCaml is our primary development language at Jane Street, and we're actively building new language features and formal verification tools. See our recent blog post, and come chat with out team at the conference.

Full-time

Hardware Engineer (FPGA/ASIC)

New York, New York

•

Today

About the Position Our goal is to give you a real sense of what it's like to work at Jane Street full time while also providing a truly unparalleled educational experience. As an intern, you are paired with full-time employees who act as mentors, collaborating with you on real-world projects we actually need done. In this internship, you'll learn how we use tools to make programming faster, more pleasant, and more reliable. We apply these same principles to our hardware engineering work, and w

Full-time

MacOS Software Engineer

New York, New York

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Today

About the Position We're looking for an experienced Software Engineer with deep macOS software experience who is also willing to work in other languages and on other platforms. In this role, you'll help build and maintain macOS internal applications and services used by our colleagues across the firm. Our macOS footprint is growing, and we want someone who can lead on the platform side of that work-both through hands-on development and guiding the rest of the team around what's reasonable to bu

Full-time

Software Engineer / Writer

New York, New York

•

Today

Full-time

Windows Engineer

New York, New York

•

Today

About the Position Our goal is to give you a real sense of what it's like to work at Jane Street full time while also providing a truly unparalleled educational experience. As an intern, you are paired with full-time employees who act as mentors, collaborating with you on real-world projects we actually need done. As a Windows Engineering intern, you'll work side by side with full-timers in the IT department to learn how we design, deploy, secure, and maintain the automation tools and key infr

Full-time

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Objective Caml jobs