Graduate Software Engineer

Jane Street SG; Hong Kong; On-site; HKD 900,000 - 1,800,000; Full time

Job summary

Jane Street is seeking Software Engineers to design and build the systems and tools that run the firm, from trading desks to accounting, with a strong emphasis on OCaml and Python as essential languages.

We value smart, curious developers who love solving hard problems, regardless of background. The firm supports open source work, collaboration, and continuous learning in a fast‑moving, global environment.

Job description

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 programming language, as our primary tool. More recently, Python has become a vital part of Jane Street's research and trading work, acting as the go‑to language for data analysis, visualisation, and machine learning.

Beyond our own environment, we also recognise the value of open‑source software, leveraging it in our daily work and releasing over a million lines of our own code as open source. We're also always looking for ways to expand open‑source projects, and provide ongoing support to things like Mercurial, the OCaml compiler, and the OPAM package manager. That said, we're interested in talented engineers with experience in any language—most of us came in with little to no practical experience in OCaml before we joined.

If you'd like to learn more, you can read about our interview process and meet some of our newest hires.

About you

We don't expect you to have a background in functional programming, OCaml, Python, finance, or any other specific field—we're looking for smart programmers who enjoy solving interesting problems. 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

If you'd like to get an idea of what we cover in our software engineering interview process, you can visit ourinterview prep page.

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.