Software Engineer — Opportunihub
Job

Software Engineer

Janestreet · London

At a glance

Type
Job
Organisation
Janestreet
Location
London
Work mode
On-site
Deadline
Rolling / not stated
Posted
8 Aug 2026

About this job

&lt;h3&gt;About the Position&lt;/h3&gt; &lt;p&gt;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.&amp;nbsp;&lt;/p&gt; &lt;p&gt;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.&amp;nbsp;&lt;/p&gt; &lt;p&gt;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.&lt;/p&gt; &lt;p&gt;If you’d like to learn more, you can read about our &lt;a href=&quot;https://blog.janestreet.com/applying-to-jane-street/&quot;&gt;interview process&lt;/a&gt; and meet some of our &lt;a href=&quot;https://www.janestreet.com/join-jane-street/get-to-know-us/&quot;&gt;newest hires&lt;/a&gt;.&lt;/p&gt; &lt;h3&gt;About You&lt;/h3&gt; &lt;p&gt;We &lt;em&gt;don’t&lt;/em&gt; 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:&lt;/p&gt; &lt;ul&gt; &lt;li&gt;A top-notch programmer with a love for technology&lt;/li&gt; &lt;li&gt;Intellectually curious, collaborative, and eager to learn&lt;/li&gt; &lt;li&gt;Humble and unafraid to ask questions and admit mistakes&lt;/li&gt; &lt;li&gt;Fluent in English&lt;/li&gt; &lt;/ul&gt; &lt;p&gt;If you&#39;d like to get an idea of what we cover in our software engineering interview process, you can visit our &lt;a href=&quot;https://www.janestreet.com/preparing-for-a-software-engineering-interview/&quot;&gt;interview prep page&lt;/a&gt;.&lt;/p&gt; &lt;p&gt;&lt;em&gt;If you&#39;re a recruiting agency and want to partner with us, please reach out to -----<p>Find more <a href="https://www.arbeitnow.co.uk/english-speaking-jobs">English Speaking Jobs in United Kingdom</a> on Arbeitnow</a>

How to apply

  1. 1 Read the full details above and confirm you meet the eligibility criteria.
  2. 2 Prepare your documents — an updated CV, and any cover letter, proposal or certificates required.
  3. 3 Click Apply on official site to complete your application on Janestreet’s official page.
  4. 4 Submit as early as possible — many close once filled.
Apply on official site

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Frequently asked questions

How do I apply for Software Engineer?

Review the full details and eligibility on this page, prepare your documents, then use the “Apply on official site” button to complete your application on Janestreet’s official page.

Is this opportunity remote or location-based?

This opportunity is based in London. Check the official listing for any relocation or on-site requirements.

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