Jane Street

Software engineer focused on front-end development, UI design, and typed functional programming for trading infrastructure tools. The role involves designing and implementing next-generation browser-based tools for expert users, maintaining a high UX bar, and creating flexible, powerful tools. Opportunities exist to develop libraries, abstractions, and improve firm-wide UI development practices. Requires strong web technology background (CSS, DOM, UI frameworks), practical experience with sophisticated UIs, and an interest in typed functional programming (Elm, ReasonML, Purescript, Typescript are a plus). The role may involve working across the stack (front-end, back-end, middleware, databases) and collaborating with traders. Fluency in English is required.

Software engineer passionate about front-end development, user-interface design, and typed functional programming to build next-generation browser-based tools for trading infrastructure. Focus on high UX, flexibility, and power for expert users, with opportunities to create libraries, abstractions, and improve development practices. Requires strong web technologies background, practical experience with sophisticated UIs, and interest in typed functional programming. Role involves working across the stack and closely with traders.

Data Specialist role focused on understanding, improving, and maintaining data for trading operations. Responsibilities include analyzing, onboarding, validating, and producing large datasets, collaborating with engineers and traders, and interfacing with exchanges and data vendors to resolve issues. Requires strong data analysis, debugging, programming, and SQL skills.

Jane Street is hiring Production Engineers in Hong Kong and Singapore. This role involves both software development and providing support for critical trading systems. Production Engineers work within software teams, focusing on creating and running great software systems, with a strong emphasis on functional programming (OCaml). They interact with various departments, solve real-time issues, and impact the firm-wide operations by owning the architecture and design of monitoring and support systems. The role requires a blend of development and support rotation, offering broad knowledge and collaboration opportunities. Candidates should be strong, curious, collaborative programmers who enjoy problem-solving and can communicate clearly under pressure.

Production Engineers at Jane Street are software developers who split their time between developing software and providing high-quality support for critical trading systems. They work alongside application developers, taking ownership of the architecture and design of systems that monitor and support the firm's trading, and design/develop their own tools. The role requires strong programming skills, intellectual curiosity, and excellent communication, particularly during production incidents. OCaml is the primary development language.

Seeking a Linux Engineering Manager to lead a team responsible for maintaining and improving the platform powering Jane Street's production trading systems. The role involves both individual technical contributions and people/project management, with a focus on Linux systems, Unix command line, and systems programming.

Jane Street is seeking Linux Engineers to maintain and improve the critical infrastructure underlying the firm's technology. This role involves debugging kernel performance, developing management tools, resolving production issues, and focusing on deployment automation, configuration management, and monitoring. The ideal candidate has deep knowledge of Unix internals and the Linux ecosystem, with practical experience in systems programming concepts.

Linux Engineers at Jane Street are responsible for maintaining and improving the critical infrastructure that powers the firm's production trading systems. This involves debugging kernel performance, developing management tools, resolving production issues, and focusing on deployment automation, scalable configuration management, and monitoring. The role requires deep knowledge of Unix internals and the Linux ecosystem, systems programming concepts, and strong troubleshooting skills.

This role focuses on maintaining and improving the critical Linux infrastructure that powers Jane Street's production trading systems. Responsibilities include debugging kernel performance, developing management tools, resolving production issues, and implementing deployment automation, configuration management, and monitoring. The ideal candidate has deep knowledge of Unix internals, Linux systems, and systems programming concepts.

Jane Street is hiring Production Engineers in London. This role involves both software development and providing support for critical trading systems. Production Engineers work embedded in software teams or in standalone teams, collaborating with application developers. The role emphasizes functional programming, OCaml, and solving real-time issues to make a firm-wide impact. They own the architecture and design of monitoring and support systems, and develop their own tools. The role requires strong programming skills, intellectual curiosity, and excellent communication, especially during production incidents.

Jane Street is hiring Production Engineers in New York. This role involves a split between OCaml software development project work and a support rotation, where engineers resolve live issues in critical trading systems. Production Engineers interact with various departments, own system architecture and design for monitoring and support, and develop internal tools. The role requires strong programming skills, intellectual curiosity, and excellent communication, particularly during production incidents. The firm emphasizes functional programming and OCaml.

Seeking an experienced Senior Data Center Engineer to design, build, scale, and maintain data center infrastructure, ensuring data safety and accessibility. Responsibilities include hands-on work, process optimization, project management, and collaboration with various internal and external teams.

Seeking a Technical Program Manager to provide organization and coordination for engineering initiatives in a core technology business. The role involves leading projects through their lifecycle, defining goals, managing timelines, tracking milestones, identifying risks, and communicating status. Requires strong communication, strategic thinking, and the ability to manage competing priorities in a fast-paced, flexible environment. Experience with software development project management and planning tools is essential.

This role focuses on automating infrastructure processes within a financial trading environment, involving coding, process optimization, and tool development. It requires understanding trading cycles and regulatory considerations.

Seeking an engineer to manage and automate internal Windows infrastructure, including servers and desktops, focusing on performance and reliability. Requires scripting experience (PowerShell, Python, C#) and collaboration within a global IT Engineering team.

Engineer to manage and automate internal Windows infrastructure, including servers and desktops, focusing on performance and reliability. Requires scripting/programming experience (PowerShell, Python, C#) and collaboration within a global IT Engineering team.

Software Engineer role at Jane Street, a trading firm that uses technology at the core of its business. The role involves working with OCaml and Python, with Python being used for data analysis, visualization, and machine learning. The company values open-source software and collaborative work. No prior experience in functional programming, OCaml, Python, or finance is expected, as training will be provided.

Software Engineer role at Jane Street, a trading firm that uses technology at the core of its operations. The role involves using OCaml and Python for data analysis, visualization, and machine learning. The company values open source and collaboration. No prior experience in functional programming, OCaml, Python, or finance is expected, as training is provided.

This role focuses on maintaining and improving the critical Linux infrastructure that powers Jane Street's production trading systems. Responsibilities include debugging kernel performance, developing management tools, resolving production issues, and implementing deployment automation, configuration management, and monitoring. The ideal candidate has deep knowledge of Unix internals and Linux, with practical experience in systems programming and troubleshooting.

Jane Street is hiring an experienced Software Engineer to join their OCaml Language team. This role focuses on improving OCaml for their technology stack, collaborating with the OCaml community. Responsibilities include enhancing the type system, optimizing code performance, improving compiler speed and usability, and developing toolchain tools for profiling, debugging, and documentation. Most work is open-source.