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Jane Street

Software Engineer

London, England, United Kingdom
Level
Mid

Not stated in the posting: salary, work type, visa.

Open. First seen 3 October 2026.

About the role

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 foundational to our internal systems. Some teams also use Python, so depending on the project, you might do some work with Python as well.

During the internship, you'll be closely mentored by full-time software engineers. Mentors design intern projects based on their team's current needs and are heavily invested in helping interns build maintainable, high-quality software that is intended to reach production. The projects you will work on are as varied and diverse as those full-timers work on, covering a wide range of problems, from high-performance trading systems to programming language design and everything in between.

If you’d like to learn more, you can read about our interview and team placement processes and get a sense of what our most recent intern projects looked like! You can also learn more about Jane Street’s internship program here.

About You

If you've never thought about a career in finance, you're in good company. Many of us were in the same position before working here. If you have a curious mind, a collaborative spirit, and a passion for solving interesting problems, we have a feeling you'll fit right in. We're more interested in how you think and learn than what you currently know. You should be:

  • A top-notch programmer with a love for technology
  • Intellectually curious, collaborative, and eager to learn
  • Humble and unafraid to ask questions and admit mistakes
  • Fluent in English

What this role asks for

Standard for software engineering roles

Python

Common in software engineering postings at any company.

Read against Jane Street's other open postings on this site.

The team: Software Engineering

This role is one of 47 open in Software Engineering.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

Python (22 of 47), Machine Learning (8 of 47), FPGA (6 of 47), SQL (6 of 47), C++ (5 of 47), Haskell (4 of 47), Jira (4 of 47)

OTHER ROLES ON THIS TEAM

From the team and dates on Jane Street's own job board.

Other openings for this role

3 open postings for this role in London, England, United Kingdom, first posted 3 October 2026. The company is likely hiring for more than one position. None has been taken down and posted again.

Salary context

214 other open postings titled Software Engineer state a salary: median USD 140,000 to USD 200,000 a year.

See Software Engineer salaries in London →

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