Jobs at Jane Street

Design and implement FPGA or ASIC applications, write and test RTL using OCaml/Hardcaml (plus Verilog/C), and extend high-level hardware design and testing tools. Collaborate on vendor-tool flows and bring projects from concept to working hardware.

Administer and optimize Workday Financials: resolve issues, maintain workflows and security, develop reports, manage integrations, audit data, support releases, testing, documentation, and end-user training across global teams.

Design, implement, and document strategic security controls for Windows-based IT platforms. Deliver and automate endpoint and vulnerability management solutions, investigate threats, build scalable tooling, and advise IT teams on remediation and security best practices.

Deploy and document security controls at scale, run vulnerability management, support incident response, collaborate with IT/engineering to build technical and procedural solutions, and maintain operational playbooks for Windows-focused environments.

Lead and scale global physical security operations by assessing and mitigating risks, developing global operating standards, coordinating incident response and post-incident reviews, managing relations with law enforcement and emergency services, and overseeing vendor/guard force expectations and tabletop exercises across regions.

Design, deploy, and operate network security infrastructure including firewalls, segmentation, and DMZ. Collaborate with Cybersecurity and Network teams to detect/mitigate threats, evaluate new platforms, improve observability through scripting, and support business workflows securely.

Source, evaluate, and procure external datasets to improve trading. Advise traders and researchers on useful data, vet vendors, negotiate contracts, and coordinate Legal, Compliance, Finance, and Data Engineering to bring datasets into production.

Hands-on internship training to support, configure, and operate desktop, network, and application systems. Tasks include responding to support requests, building and configuring Windows and Linux devices, supporting Windows domain infrastructure, monitoring systems, troubleshooting desktop/server/network issues, automating/admin tasks with scripting (e.g., PowerShell), and maintaining technical documentation.

Maintain and build the firm's Linux infrastructure across on-prem and cloud: packaging (Nix/RPM), kernels/drivers, storage, networking, automation, incident diagnosis, upgrades, and platform tooling. Act as Linux expert, teach others, automate operational work, and run production systems reliably.

The Machine Learning Educator will develop and teach ML programs, mentor teachers, and write code to enhance learning at Jane Street.

The Unified Communications Engineer will manage global voice and video infrastructure, configure Cisco UC products, and integrate cloud conferencing technologies while troubleshooting issues and ensuring system stability.

Work alongside full-time IT engineers to design, deploy, secure, and maintain Windows automation and infrastructure. Develop and improve tools, CI/CD pipelines, configuration management, and monitoring solutions. Write code in OCaml, F#/C#, and PowerShell, implement editor and workflow improvements, and collaborate on mission-critical projects under mentor guidance.

Build supply/demand models and granular balance sheet analytics for major agricultural commodities (corn, soybeans, wheat). Collaborate with trading to generate actionable market and scenario-driven trading insights. Use statistical modeling and scenario analysis to evaluate seasonality, production cycles, and trade flows in a fast-paced trading environment.

Internship role focused on investigating alerts, incident response, and threat hunting across diverse log sources. Build tools and automation to improve detection and response, learn secure engineering practices, and educate the firm on security trade-offs and best practices while paired with full-time mentors.

Partner with New York leadership to provide strategic and operational HR support: employee relations, manager coaching, performance management, people-process design, data analysis, and global HR initiatives. Serve as a trusted resource for employees and help shape talent, career, and leadership development.

Join a rotational 18-month workplace services program supporting Travel, Events, Front of House, Conference Center, Food Services, and Operations. Provide hands-on support across rotations, own defined focus areas, maintain trackers/schedules/expense reports, build cross-team relationships, and identify process improvements. Transition to a permanent Workplace Services or generalist role after program completion.

The Immigration and Mobility Specialist manages global immigration and relocation programs, providing guidance, ensuring compliance, collaborating with teams, and analyzing data.

Optimize the performance of ML models for training and inference. Focus on CUDA optimization and systems approach, ensuring low latency and high throughput in real-time. Debug and utilize modern tools and techniques for system performance improvements.

Manage and optimize global recruiting processes and systems, document workflows, identify inefficiencies, run recruiting initiatives, partner with engineering/product on tool development, maintain data integrity, create reports on hiring metrics, and support stakeholders across New York, Europe, and Asia.

The IT Operations Engineer supports, configures, and maintains systems including desktop environments and network infrastructure, addressing tech support requests and optimizing workflows. Responsibilities include troubleshooting, system monitoring, and collaboration with users, requiring problem-solving and communication skills.