London, England, United Kingdom · On-site
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 powerfu…
Skills: Code Generation, Compiler Design, x86-64, AArch64, LLVM
Ghent, Flanders, Belgium · On-site
We're excited to be at the International Conference on Field-Programmable Logic and Applications (#FPL2026) in Ghent, Belgium and to connect with researchers working on FPGA architectures, tools, and applications.
Skills: Fpga Architectures, Fpga Tools, Fpga Applications
New York, New York, United States · On-site
About the Position We are looking to hire an experienced Grains and Oilseeds Analyst to collaborate closely with our Trading team to build comprehensive supply/demand models for major agricultural markets, develop granul…
Skills: Supply/Demand Modeling, Balance Sheet Analytics, Agricultural Commodities Analysis, Statistical Modeling, Scenario Analysis
New York, New York, United States · On-site
$225k–$300k/yr
About the Position Jane Street's compute footprint is growing fast, and we’re looking for someone who can support buying across memory, NAND, and CPU infrastructure. This position will be at the heart of our technology s…
Skills: Strategic Sourcing, Vendor Management, Contract Negotiation, Hardware Procurement, Demand Forecasting
New York, New York, United States · On-site
$225k–$300k/yr
About the Position We're looking for a Cybersecurity Engineer to help us mature our vulnerability management program. You'll join our Cybersecurity team, a skilled group of programmers and security experts dedicated to k…
Skills: Vulnerability Management, Automation, AI Tooling, Threat Modeling, Data Pipeline Integration
New York, New York, United States · On-site
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 powerfu…
Skills: Code Generation, Compiler Design, x86-64, AArch64, LLVM
Seattle, Washington, United States · On-site
We're looking forward to attending #OSDI in Seattle and discussing our latest work in systems design. Stop by our table and meet the team!
Skills: Systems Design
Seoul, South Korea · On-site
We're headed to Seoul for #ICML2026! Deep learning is a major driver of our trading at Jane Street, and we're excited to connect with others working on hard problems across different modalities. Visit our booth to chat w…
Skills: Deep Learning, Trading
New York, New York, United States · On-site
$125k–$175k/yr
About the Position We’re looking for an experienced logistics and supply chain professional to help manage our equipment inventory, delivery, installation, and deployment for our offices, data centers, and co-locations, …
Skills: Logistics Management, Supply Chain Management, Project Management, Inventory Management, Vendor Management
London, England, United Kingdom · On-site
About the Position We're looking for software engineers and researchers to establish a new Formal Methods team at Jane Street. With the emergence of agentic programming, we think formal methods will play a major role in …
Skills: Formal Methods, Interactive Proof Assistants, Automated Theorem Provers, Static Analysis, Refinement Types
New York, New York, United States · On-site
$250k–$300k/yr
About the Position We're looking for software engineers and researchers to establish a new Formal Methods team at Jane Street. With the emergence of agentic programming, we think formal methods will play a major role in …
Skills: Formal Methods, Interactive Proof Assistants, Automated Theorem Provers, Static Analysis, Refinement Types
Hong Kong, Hong Kong Island, Hong Kong S.A.R. · On-site
About the Position We are looking for a financing professional to support and develop Jane Street's APAC financing capabilities across multiple asset classes. To thrive in this role, you’ll need prior experience developi…
Skills: Securities Financing, Asian Market Microstructure, Stock Loan Markets, Risk Management, Data Analysis
Hong Kong, Hong Kong Island, Hong Kong S.A.R. · On-site
About the Position We’re looking for an experienced logistics and supply chain professional to help manage our equipment inventory, delivery, installation, and deployment for our offices, data centres, and co-locations, …
Skills: Logistics Management, Supply Chain Management, Project Management, Inventory Management, Vendor Management
Hong Kong, Hong Kong Island, Hong Kong S.A.R. · On-site
About the Position We are hiring a newly created Tax Structuring and Advisory role in our Hong Kong or Singapore office with a focus (though not exclusively) on APAC-region tax issues . You will help us manage tax and re…
Skills: Tax Structuring, Tax Advisory, International Tax, Financial Product Taxation, Analytical Skills
New York, New York, United States · On-site
$150k–$300k/yr
About the Position We’re looking for a Credit Financing Specialist to support and develop Jane Street’s US corporate bond financing capabilities. To thrive in this role, you’ll need prior experience in corporate bond fin…
Skills: Corporate Bond Financing, Securities Lending, Relationship Management, Data Analysis, Python
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The role involves the full cycle of identifying, coding, testing, and deploying new optimizations for the OxCaml compiler. You will work with various intermediate representations to improve high-performance and parallel programming capabilities.
Candidates should be productive software engineers experienced with low-level Linux tools, debuggers, and ideally x86-64 or AArch64 architectures. Proven experience in managing a team of developers is highly desired.
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.
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 [email protected]
Jane Street is a quantitative trading firm with offices in New York, London, Hong Kong, Singapore, and Amsterdam. We are always recruiting top candidates and we invest heavily in teaching and training. The environment at Jane Street is open, informal, intellectual, and fun. People grow into long careers here because there are always new and interesting problems to solve, systems to build, and theories to test. More than twenty years after our founding, it still feels like we’re just getting started. Jane Street does not offer any services to individual investors: https://www.janestreet.com/fraud-and-impersonation-warnings/
Offices: 250 Vesey Street, New York, NY 10281, US · 2 & A Half, Devonshire Square, London, EC2M 4UJ , GB · 10th Floor, Chater House, 8 Connaught Rd., Hong Kong, Central, HK · WTC Tower Ten - L19, Strawinskylaan 1657, Amsterdam, 1077 XX , NL · 10 Collyer Quay, 4/F, Ocean Financial Centre, Singapore, 049315, SG
Jane Street is a quantitative trading firm with offices in New York, London, Hong Kong, Singapore, and Amsterdam. We are always recruiting top candidates and we invest heavily in teaching and training. The environment at Jane Street is open, informal, intellectual, and fun. People grow into long careers here because there are always new and interesting problems to solve, systems to build, and theories to test. More than twenty years after our founding, it still feels like we’re just getting started. Jane Street does not offer any services to individual investors: https://www.janestreet.com/fraud-and-impersonation-warnings/
Offices: 250 Vesey Street, New York, NY 10281, US · 2 & A Half, Devonshire Square, London, EC2M 4UJ , GB · 10th Floor, Chater House, 8 Connaught Rd., Hong Kong, Central, HK · WTC Tower Ten - L19, Strawinskylaan 1657, Amsterdam, 1077 XX , NL · 10 Collyer Quay, 4/F, Ocean Financial Centre, Singapore, 049315, SG
