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Jane Street is a quantitative trading firm that uses innovative technology, a scientific approach and a deep understanding of markets to guide our business. We are a global liquidity provider and market maker, operating around the clock and around the globe, out of offices in New York, London, Hong Kong and Amsterdam.

The markets change rapidly, and we need to change faster still. Every day, we come to work with new problems to solve, new systems to build and new theories to test. We’re always looking for people to join us and help come up with that next great idea.

The environment is intellectual and collaborative, relaxed and playful, with a strong focus on education. You’ll learn about trading and our technology stack through in-house classes, guest lectures and on-the-job experiences. You’ll have the freedom to get involved in many different areas of the business and we’re small enough that you can quickly and clearly see the impact of your work.

WHAT WE LOOK FOR

Our growth comes from hiring and training amazing people and giving them the tools they need to innovate. Specific requirements for our roles change a bit depending on which group you join, but there are some things we look for in everyone we hire. We need intellectually curious problem solvers on all of our teams. We have a flexible internal structure; people often move between different projects, and their roles evolve over time.

Open communication and collaboration are huge parts of our culture. You should be excited to learn from others, comfortable admitting when you’re wrong, and open minded about what you might not know. We know there’s still a lot for us to learn—we’re looking for people who can help us come up with our next great ideas.

If you are recruiting for:

• Full-time opportunities - APPLY NOW! Please review our opportunities here. 
• 2021 summer internships - APPLY NOW! Please review our opportunities here. You can also read more about our internship program here.

Both our full-time and summer intern positions are available within the following groups. Candidates are welcome to apply to one or many groups. 

QUANTITATIVE TRADING
We trade based on our own proprietary models. Quantitative analysis and insights into related markets enable us to make competitive markets in even the most complicated products. On busy days, we trade over $10–20 billion in US equities alone. During peak trading hours, trading desks are central to the excitement of our offices. Once the buzz has subsided, they’re a place for mentorship and open discussion.

People of all experience levels work together on the trading floor, from the newest campus hire to the most seasoned trader. When trading ends, chess, poker and other strategy games are all regular parts of after hours learning and fun.

SOFTWARE ENGINEERING
Technology is core to our business, and software development is integrated into everything we do. The scope of the systems we build is large, with billions of dollars of transactions flowing through them every day; but the group behind them isn’t. That means that each person has the opportunity to make a substantial impact.

At Jane Street, functional programming isn’t a tool we reserve for some special set of problems. From systems automation to trading systems, from monitoring tools to research code, we write everything that we can in OCaml. We think it’s a tool that works well for solving a wide spectrum of problems. On top of that, we think that designing software in OCaml is just more fun.

Jane Street is an incredible place to develop as an engineer. From compiler design to operating system internals, you can find people with deep experience who are eager to teach you what they know.

QUANTITATIVE RESEARCH
Asking great questions is more important than knowing all the answers. Researchers at Jane Street investigate some of the most challenging problems presented by the competitive marketplace. The problems we work on rarely have clean, definitive answers and we are comfortable pushing in new and unknown directions while maintaining clarity of purpose. 

As a quantitative research you will use a wide range of computational and statistical techniques, write code to analyze large sets of data, work with traders to develop new signals, models and strategies, and work with software developers to bring your models into production.

BUSINESS DEVELOPMENT
Business Development sits at the intersection of our trading, technology, operations, and compliance teams. We improve the firm’s existing business and consider potential new business opportunities by understanding the regulatory and operational frameworks of various financial markets, and how they impact the implementation of the firm’s systems, processes, and trading strategies. 

If you are interested in a full time position within Business Development, you should apply for the Rotational Development Program. 

INTERNSHIPS
We offer internships in four different groups: trading, technology, research and business development. All of our offices follow a slightly different internship schedule, though our typical summer internship lasts 10–12 weeks. You work alongside full timers, and we get to know you and see how you think about and solve the kinds of problems we deal with every day. All interns also spend time in a foreign office with travel and accommodation arranged by Jane Street.

Before summer starts, all of our mentors design projects for incoming interns. Interns and mentors are paired up one-to-one, allowing for close collaboration over the course of your project. Interns typically work on two or more projects over the course of a summer, so you’ll have a few full-time mentors during your time here.

Our interns are sharp, so we ask them to consider questions that we really want the answers to, like:

• Common robust regression techniques, implemented naively, require “remembering” all of the data. Our data sets are often too big for this. How can we accomplish the same thing with a smaller memory footprint?
• Sometimes the markets behave strangely in a way that is obvious to humans. Can we get a computer to recognize these situations?

In other cases, we want to execute on something specific. Here are some past projects:

• Developing and evaluating algorithms to extend the parallelism of the change propagation phase in our in-house parallel/incremental compute engine.
• Building a tracing tool for programs using Async, our concurrent programming library. This tool makes it possible to recover useful stack traces that cross over Async’s bind operator, and to explore these traces with a web-based viewer.

CULTURE & BENEFITS
Work at Jane Street is exciting and challenging. We trade in incredibly competitive, fast-paced environments, and feedback on successes and failures is quick and tangible. This allows for constant evaluation and improvement of our strategies and performance. 

At Jane Street, we like to work together — and play together. 

Classes & Events
We have regular after work events including: talks, trivia nights, dinners, sports and cultural outings, and classes. Some of our recent class topics have included: Asynchronous
programming with Async, Game Theory, Options Valuation, Decision Theory and Cognitive Biases, Profiling with Perf, and The Kelly Criterion. 

Library
Each of our offices has an on-site library stocked with books ranging from academic journals and textbooks on finance and computer science topics (including data structures and algorithms, financial mathematics, time series, heuristics and biases in decision-making, and various programming languages), to general cultural or intellectual interest (including some by former guest speakers).

Puzzles & Games
Puzzles and games are a regular part of life at Jane Street. After work, people often play poker, chess, bughouse, Hanabi, Dominion, pool, ping pong and foosball. It’s common to find people completing crossword puzzles for time.

For more information about day-to-day life at Jane Street and our offices and benefits please visit our website.