Software Engineer

Jane Street
London, United Kingdom
On-site

Who this role is best for

Geared toward intellectually curious programmers comfortable with building systems and tools in a functional programming environment, with a focus on collaboration and learning.

Best fit for

  • Candidates who enjoy solving complex technical problems and are open to learning functional programming languages
    — “We’re more interested in how you think and learn than what you currently know
  • Individuals with experience in software development across various domains and a strong interest in infrastructure and research tools
    — “solving real problems in critical areas ranging from trading desks to our accounting team
  • Programmers who value collaboration and humility, and are willing to ask questions and admit mistakes
    — “Humble and unafraid to ask questions and admit mistakes

Things to consider

  • The role may involve learning OCaml and Python, even if not previously experienced with them
    — “most of us came in with little to no practical experience in OCaml before we joined

How to stand out

  • Highlight experience with system design and infrastructure development in your resume and interview answers
    — “design and build the systems and tools that run the firm
  • Showcase your ability to work collaboratively and adapt to new technologies in your application materials
    — “collaborative, and eager to learn
  • Emphasize any contributions to open-source projects or willingness to engage with community-driven tools
    — “releasing over a million lines of our own code as open source
Pace · SteadyCollaboration · MediumAutonomy · MediumDecision Impact · TeamLevel · Mid Level

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • implemented network monitoring
  • developed risk models
Typical background
software engineeringfunctional programming

Skills & requirements

Required

Functional ProgrammingOcamlPythonNetwork MonitoringRisk Models

Preferred

Open Source ContributionFinancial Trading Systems

Stack & domain

Functional ProgrammingOcamlPythonNetwork MonitoringRisk ModelsOpen Source SoftwareMercurialOcaml CompilerOPAM Package ManagerProblem-solvingCollaborationLearningCommunicationFinanceTradingAccountingInfrastructure

About the role

Original posting from Jane Street

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, visualization, and machine learning. 

Beyond our own environment, we also recognize 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

Fluent in English

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

If you're a recruiting agency and want to partner with us, please reach out to agency-partnerships@janestreet.com.

Source: Jane Street careers

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