Jane Street

Software Engineer

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Job vacancy: From now on
Permanent position
Permanent position
International excluding Germany
Entry from the 21.09.2026
Position number 120713

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

Your skills

Field of study preferred
  • Engineering sciences
    • Architecture
    Civil engineering
    Biological engineering
    Chemical & process engineering
    Electrical engineering & information technologies
    Geodesy & geoinformatics
    Informatics
    Mechanical engineering
    Material sciences & engineering
    Mechatronics & information technologies
    Optics & photonics
    Other fields of study
    Engineering Structures
    Mobility and Infrastructure
    Regional Science
    Water science engineering
    Mechanical Engineering
    Energy Engineering and Management
    Mobility Systems Engineering and Management
    Remote Sensing and Geoinformatics
    Management of Product Development
    Information System Engineering and Management
    Technology and Management in Construction
    Biomedical Engineering
    Computer Science
    Electrical Engineering and Information Technology
    Mechatronics and Information Technology
    Medical technology
    Photon Science and Technology
  • Natural sciences and Technology
    • Applied geosciences
    Biology
    Chemistry
    Chemical biology
    Geoecology
    Geophysics
    Food chemistry
    Mathematics
    Meteorology
    Physics
    Other fields of study
    Mathematics in Technology
    Meteorology and Climate Physics
    Applied Environmental Informatics and Earth Observation
    Computational and Data Sience
    Geophysics
    Meteorology and Climate Physics
    Physics
    Techno-Mathe­matics
  • Other e.g. teaching degrees
    • Other fields of study
    German
    Philosophy / Ethics
    Sports
    Biology
    Chemistry
    Geography
    Computer Science
    Engineering Education
    Mathe­matics
    Natural sciences and Technology
    Physics
  • Economic & law sciences
    • Information Engineering
    Business engineering
    Business management
    Other fields of study
    Digital Economics
    Fincinal Engineering
    Production and Operations Management
Favored career stage
  • Graduate/Beginner

This is what the workplace looks like.

Sector
  • Finance & accounting
Working time model
Full-time
Language at workplace
English

Company information

Type of company
Corporation

Contact

Mrs. / Ms. Ariana Kamboj
Jane Street
2½, Devonshire Square
EC2M 4UJ London
United Kingdom
Tel: +44 020 3787 3200
E-Mail: Please log in to read the stated e-mail address
Company address

Jane Street
2½, Devonshire Square
EC2M 4UJ London
United Kingdom
Telefon: +44 020 3787 3200
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