Software Engineer

Posted 8 Days Ago
Be an Early Applicant
London, Greater London, England, GBR
In-Office
Internship
Financial Services
The Role
Intern will be paired with full-time engineers to build production-quality software, learn OCaml (and sometimes Python), and work on diverse projects from trading systems to language design under close mentorship.
Summary Generated by Built In
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


Skills Required

  • Top-notch programming ability
  • Intellectually curious and eager to learn
  • Collaborative and humble, able to ask questions and admit mistakes
  • Fluent in English

Jane Street Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Jane Street and has not been reviewed or approved by Jane Street.

  • Healthcare Strength Medical, dental, and vision coverage are offered at no cost for employees and dependents, with robust onsite care including primary care, physical therapy, and mental‑health therapy. Private onsite gyms and counseling resources further reinforce the health focus.
  • Parental & Family Support Fully paid parental leave for all parents, with additional time for birth parents, is highlighted alongside expanded fertility benefits and well‑equipped nursing suites. These offerings position family support as a core element of the package.
  • Wellbeing & Lifestyle Benefits Daily free meals and snacks, private onsite gyms, recreation spaces, and rich learning programs (including tuition reimbursement and company classes) elevate day‑to‑day quality of life. Onsite medical suites and speaker series add to the lifestyle and development mix.

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The Company
HQ: New York, NY
1,390 Employees
Year Founded: 2000

What We Do

Jane Street works differently. As a liquidity provider and market maker, we trade on more than 200 trading venues across 45 countries and help form the backbone of global markets. Our approach is rooted in technology and rigorous quantitative analysis, but our success is driven by our people. Our bright, beautiful offices in the heart of New York, London, Hong Kong, and Amsterdam are open and buzzing with conversation. We come from many backgrounds and encourage travel between offices to share perspectives. Some of our best ideas come from bumping into a visiting colleague at the office coffee bar. Markets move fast. Staying competitive as we’ve grown has required constant invention—of new trading strategies, technology, and processes. We’ve found this is easier when you hire humble, kind people. They tend to help each other, and prioritize teamwork over titles. We invest heavily in teaching and training. There’s a library and a classroom in every office, because deepening your understanding of something is considered real work. Guest lectures, classes, and conferences round out the intellectual exchanges that happen every day. People grow into long careers at Jane Street 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.

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