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Role description

Software Engineer

Jane Street logoJane Street
TypeInternship
SeniorityIntern
LocationLondon, England, United Kingdom
Posted8/3/2026
Engineering

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

Relevant archetypes

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Company info

Jane Street logo

Jane Street

Jane Street is a quantitative trading firm with offices in New York, London, Hong Kong, Singapore, and Amsterdam. We are always recruiting top candidates and we invest heavily in teaching and training. The environment at Jane Street is open, informal, intellectual, and fun. People grow into long careers here because there are always new and interesting problems to solve, systems to build, and theories to test. More than twenty years after our founding, it still feels like we’re just getting started. Jane Street does not offer any services to individual investors: https://www.janestreet.com/fraud-and-impersonation-warnings/

Private company
Founded2000
HQNew York City, United States
Unlock human wisdom
ThesisTermsPrivacy
Size
1,001–5,000 employees
IndustryFinancial Services
Tech stackatlassian-confluence, apple-business-manager, viavi-, bootstrap, unity-3d, autodesk, complysci, microsoft-compliance-manager, hr-partner, elasticsearch
News
  • Jane Street more than doubled its Nvidia stake last quarter, filings reveal
  • Jane Street Lifts Its Strategy (MSTR) Stake 54% to 4.1 Million Shares
  • A false smoke alarm nearly flooded Jane Street’s New York datacenter
  • Jane Street reports more than 5% of AXT (AXTI) through two subsidiaries.
  • Jane Street's first public AI skill is a strict Socratic tutor, not a trading bot

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