# Compiler Engineer Source: https://realanalystjobs.com/job/compiler-engineer-jane-street-3dca7e8c Compiler Engineer at Jane Street, an on-site role based in London, UK. Posted on 26 June 2026, read from Jane Street's own careers page (Greenhouse), which RealAnalystJobs re-checks daily and removes the role when it closes. Jane Street is on the Home Office register of licensed visa sponsors. Updated 15 November 2026. ## Key facts - Company: [Jane Street](https://realanalystjobs.com/companies/jane-street) - Location: London, UK - Work mode: On-site - Posted: Jun 26, 2026 - Employment type: Full time - Source: Jane Street's careers page (Greenhouse), re-checked daily ## Visa sponsorship The posting does not say. Licensed UK sponsor. Licensed by the Home Office to sponsor Skilled Worker visas (register of 27 Oct 2026). A licence means the employer can sponsor; it does not mean every role will be sponsored. Listed as Jane Street Europe Limited (London). ## About this role About the Position We are looking for an experienced software engineer to work on code generation in the OxCaml compiler, which is open source. OxCaml is Jane Street’s variant of the OCaml language, equipped with powerful features for high-performance and parallel programming, with data race freedom guarantees. This role involves the full cycle of identifying new optimisations, coding, testing, benchmarking and deployment. There will be the opportunity to work across a wide variety of intermediate representations, including CPS, SSA and maybe even Sea of Nodes. This role will also allow you to interact with many different groups and exceptional individuals across Jane Street worldwide. About You The ideal candidate will be super productive: fast at writing correct code, willing to use AI assistance to get changes to production faster and experienced with debuggers (e.g., lldb, gdb) and low-level Linux tools. Having knowledge of x86-64 and AArch64 architectures at the assembly language and architectural level is a plus. We are happy to consider candidates with experience on any compiler toolchain, although knowledge of LLVM would be useful. No knowledge of the OCaml or OxCaml languages is required - we can teach you what you need to know. We are particularly interested in candidates who have proven experience managing a team of developers, and who would enjoy doing that alongside their normal technical work. Fluency in English is required. If you're a recruiting agency and want to partner with us, please reach out to agency-partnerships@janestreet.com Description from Jane Street's public careers feed, reproduced so you can read the role here. Apply on the company's own site; Real Analyst Jobs never submits anything for you. ## How to apply Open [this role on Real Analyst Jobs](https://realanalystjobs.com/job/compiler-engineer-jane-street-3dca7e8c) and use Apply now there to reach the employer's application. The listing is re-checked against Jane Street's careers page daily and removed when it closes. ## Jane Street 2 open analyst roles on Real Analyst Jobs. [More roles at Jane Street](https://realanalystjobs.com/companies/jane-street) ## More like this ### Other open roles at Jane Street - [AML Onboarding Analyst](https://realanalystjobs.com/job/aml-onboarding-analyst-jane-street-c0bece94), London, UK (On-site) - [Compliance Analyst](https://realanalystjobs.com/job/compliance-analyst-jane-street-4891db4c), London, UK (On-site) - [Data analyst jobs in the UK](https://realanalystjobs.com/jobs/data-analyst-jobs-in-uk) - [Analyst job market report](https://realanalystjobs.com/analyst-job-market) - [What analyst roles pay](https://realanalystjobs.com/blog/data-analyst-salaries) ## Sources and links - [This role on Real Analyst Jobs](https://realanalystjobs.com/job/compiler-engineer-jane-street-3dca7e8c) - [Jane Street on Real Analyst Jobs](https://realanalystjobs.com/companies/jane-street) - [All analyst jobs](https://realanalystjobs.com/jobs)