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 View email address on janestreet.com .
Vacancy posted 23 hours ago
Similar jobs that could be interesting for youBased on the Software Engineer in London vacancy
£400 per day
...Job title: Junior Software Engineer Client: Innovation-led organisation Salary: Up to £400 per day Location: London Skills: C#, .NET, REST APIs, SQL, Object-Oriented Programming The Role We’re partnering with an established, innovation-led organisation...Suggested£400 per day
...Role: Junior Software Engineer (C# / .NET) Client: Established Innovation-Led Organisation Compensation: Competitive (Contract) Location: London (Hybrid Working) Overview: We’re partnering with an established, innovation-led organisation to hire a talented Junior...SuggestedHybrid working- £64k - £84k per annumEstimated...project, ZeroRISC is driving commercial adoption of high assurance software and services rooted in open silicon designs. Our products forge... ...where they’re deployed. Role Overview As a Software Engineer at zeroRISC, you will develop our suite of security-focused...Suggested
- £80k - £106k per annumEstimated...the leading developer of Embodied AI technology. Our advanced AI software and foundation models enable vehicles to perceive, understand,... ...experience that defines your career! The role As a software engineer for Wayve’s Simulation Technology team, you will be an expert...SuggestedHourly payFull-timeHybrid workingOn-siteWork from home
£2,500 per month
...Overview YouView creates software for set-top boxes, streaming pucks, and smart TVs to deliver a TV experience users love . YouView’... ...handle millions of requests every day. We’re looking for a software engineer that is excited to learn, grow, and contribute to building...SuggestedHybrid workingOn-siteFlexible hours- £58k - £77k per annumEstimated...and we are now looking to expand our Aura team with more skilled Engineers. As of today, Aura is running hundreds of managed Kubernetes... ...Graph Intelligence Platform. Now, we are looking for experienced Software Engineers with Kubernetes experience to join our Networking team...Hybrid working
- ...capabilities, to strengthen and advance democracy. Behind every capability we field is the engineering that turns a fragile proof-of-concept into something dependable. We're hiring experienced software developers to work shoulder-to-shoulder with our research team and help close that...SeasonalImmediate startRemote
£100k - £130k per annum
...trajectory is ambitious, from zero to seven figures in recurring revenue within its first year and this is only the beginning. As a Software Engineer, you’ll join a small, high calibre team where ownership is everything. You’ll work primarily on the backend, integrating with...PermanentOn-siteImmediate start£80k - £120k per annum
...the starting point. The ambition is nothing short of becoming the engine that powers global innovation. The team is small but mighty.... ...complex systems, working directly with customers, and building software that has an immediate impact, this is your moment. The technical...PermanentOn-siteImmediate startMonday to Friday£90k - £110k per annum
Are you interested in joining a company that is rapidly gaining market share? This challenger company is disrupting the telecommunications industry, which has long been dominated by a few large corporations. They have established a competitive edge in the market and have been...Permanent- £59k - £79k per annumEstimated...algorithms. Our technology forms an integral part of our customers’ software development lifecycles, from the design stage to analytics and... ...regardless of their background. We are looking for the best R&D Engineers to help scale our products to the next level. We have a...
€75k per annum
...Software Engineer Cyprus Up to €75,000 Plus Bonus Relocation is offered Quant Capital is urgently looking for a Software Engineer to join our high profile client. Our client is a $10 billion strong Hedge fund with performance figures of 18%....RelocationFlexible hours- £48k - £64k per annumEstimatedMOO is all about making great design available to everyone. We do that by producing premium print and branded merchandise. But it’s as much about how we do it, leading with design, technology and sustainability. Founded in 2004, we’ve come this far by being obsessed with...PermanentFull-time
£80k per annum
...and Europe, they are expanding their team to support large-scale data science and modelling initiatives. They are looking for a Software Engineer specialising in Analytics & Insights to design and build enterprise analytics products. The role focuses on developing high-quality...PermanentRemote£36 per hour
...Research Engineer / Software Engineer - AI/ML Systems Location: London, Kings Cross Working Pattern: Hybrid onsite, 3 days per week Contract Length: 6 months, with possible extension Start Date: ASAP Working Hours: Monday-Friday, 9am...Hourly pay40 hours/weekInternshipHybrid workingImmediate startMonday to Friday- £64k - £83k per annumEstimated...Software Engineer - Back End Location: London About Elwood As an FCA-regulated firm, Elwood Technologies provides institutional investors with a seamless, end-to-end digital asset trading, execution, and risk management infrastructure connected...
£90k - £120k per annum
..., and more reliably than ever. By replacing clunky, decades old software with custom AI powered tools, they’re solving problems traditional... ...problems with smart tech and real impact. If you’re a Software Engineer at heart but also have an “infra brain,” this could be your...PermanentHybrid workingOn-siteFlexible hours- £53k - £70k per annumEstimated...Arondite is a defence technology company building the foundational software and AI to power the autonomous age. Our aim is to revolutionise... ...values and by our strong belief that an elite group of engineers can make a big difference. We are ambitious, well-funded and building...Long-term contractHybrid workingRelocation packageVisa sponsorshipOn-siteWork from home
- £82k - £106k per annumEstimated...is paid fairly for the great work they do Our Product & Engineering Team: Liberis is building the embedded finance platform that... ...with data, or exploring how AI can transform the way we build software, we're looking for engineers who enjoy solving complex problems...Hybrid workingOn-site
- Software Engineer A bit of background on ELMO UK ELMO UK is building software that helps organisations deliver better experiences for their people. We care about creating products that are useful, well-crafted and reliable, and we know great technology comes from teams...Hybrid workingFlexible hours
- £53k - £71k per annumEstimated...These companies face unique, complex challenges that typical software was never designed to solve. Cogna was founded to change this. Our... ...societies we serve. The Role We're looking for a Software Engineer who is genuinely excited about building with AI, not just building...Long-term contractFull-timeImmediate start
£100k - £120k per annum
...AI at the heart of it (LLMs & Agentic AI). We're growing the engineering team that will be working shoulder to shoulder with some... ...are completely redefining the industry the product sits within.Software Engineers that are building / want to build 0-1... let's chat....Permanent- £47k - £62k per annumEstimated...About Landmark Landmark, a Halliburton company, builds the software and data platforms that help the global energy industry make... ...optimization, and digital operations. These are tools used daily by engineers and scientists at the world's largest energy companies and run...Long-term contractFull-timePart-timeSecond job
£75k - £85k per annum
...regulatory standards, and integrates seamlessly with top-tier legal software such as Elite 3E, Aderant and Intapp. As an early stage... ...a product from scratch in a team of creative, solution oriented engineers. You’ll work on bleeding edge technologies; integrating AI, LLMs...PermanentOn-site- £73k - £96k per annumEstimated...As a small, ambitious startup, you'll work directly with our founder and a core team of talented engineers to drive innovation. What You'll Do Design & Build robust software systems – develop scalable backend services and APIs that power our AI-driven applications....Full-timeHybrid working2 days/week
- £50k - £67k per annumEstimated...finance, and entirely new propositions that are redefining how customers interact with money, data, and value. As a Backend Software Engineer, you’ll play a key role in bringing this vision to life. You’ll be working on a connected, modern platform that integrates seamlessly...Full-time
Lloyds Banking Group
London4 days ago - £73k - £98k per annumEstimated...integrations, and revenue growth. We are a highly data-driven engineering organization. We validate ideas through experimentation,... ...applications using Python and Django, with a solid understanding of software engineering principles and modern backend development. Quality...Long-term contractFull-timeOn-siteRemoteFlexible hours
- £80k - £107k per annumEstimated...TL;DR We're looking for an exceptional software engineer to help build the platform that powers Lovable Enterprise. Enterprise adoption is growing rapidly, and we're building the infrastructure that allows customers to deploy Lovable securely across AWS, Azure, and Google...Long-term contractFull-timeFlexible hours
£40.14k per annum
...About the Role Our world-leading Time & Frequency department is seeking a Software Engineer. This is an exceptional opportunity to join the global authority in precision timing at a defining moment for UK digital infrastructure. Backed by a government investment of...PermanentFlexible hours- £58k - £77k per annumEstimated...Music Entertainment is a member of the Sony family of global companies. Sony Music's Product Design Engineering and Global Operations (PDEGO) Team is looking for a Software Engineer to join our D2C team in our King’s Cross office (London). Your work will power the...On-site
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Software Engineer. Be the first to apply!
Related searches
- software engineer cloud services company London
- mobile software developer London
- marketing software London
- accounting software trainer London
- graduate software engineer graphics programmer c++ London
- software technician London
- software engineer javascript London
- retail software London
- igloo software London
- software asset management analyst London