Linux Engineer at Jane Street | New York, NY

About the PositionAs a Linux Engineer at Jane Street, you will play a pivotal role in managing the essential infrastructure that supports our entire technology landscape. This dynamic group comprises dedicated Systems Engineers, Administrators, and Programmers focused on enhancing and maintaining the platform that drives Jane Street's production trading systems. Our blend of proprietary and open-source software empowers you to explore and innovate at every level. Whether you're debugging kernel performance, crafting management tools, or swiftly addressing production issues, tackling complex systems challenges is our forte.We prioritize deployment automation, scalable configuration management, and meticulous monitoring as part of our ongoing projects. While we automate extensively, it's not merely for convenience; we believe automation minimizes errors and reduces workload—plus, we find it enjoyable!Being part of our team opens avenues to collaborate with nearly every department within the company. You will engage directly with colleagues in Trading, Technology, and Operations to develop and sustain systems with a firm-wide impact. By leveraging feedback from various teams and our custom monitoring tools, we aim to quickly resolve production challenges, conduct thorough root-cause analyses, and implement long-term solutions in a clean and effective manner.About YouWe seek talented Systems Programmers and Administrators with robust expertise in Unix internals and the Linux ecosystem. Ideal candidates will have a willingness to learn OCaml, our preferred programming language, and should meet the following qualifications:Bachelor's degree in Computer Science, Software Engineering, or a related technical field (or equivalent experience)Excellent communication skills coupled with the ability to analyze and dissect technical problems efficientlyComprehensive understanding of operating system fundamentals, particularly LinuxProficiency with the Unix command line and shell scriptingHands-on experience with modern Linux systems and systems programming concepts, including C, sockets, virtual memory, and process lifecycleBasic knowledge of network protocolsStrong troubleshooting abilities and familiarity with profiling/debugging tools such as gdb, perf, DTrace, eBPF, or SystemTapProgramming experience in any language (functional languages are a plus)

About the Position Join our dedicated team of Linux Engineers at Jane Street, where you will be instrumental in maintaining the vital infrastructure that supports our cutting-edge technology. Our team comprises skilled Systems Engineers, Administrators, and Programmers focusing on enhancing the platform that drives Jane Street's production trading systems. With a blend of proprietary and open-source software, you will have the opportunity to explore and innovate at every level. Your day-to-day activities might include debugging kernel performance, developing management tools, or addressing production issues on the fly. Solving complex systems challenges is our forte. We emphasize deployment automation, scalable configuration management, and meticulous monitoring in our ongoing projects. While we automate as much as possible, it's not out of laziness; rather, we believe that automation minimizes errors and lightens our workload—plus, we find it enjoyable. Working within our team provides a unique opportunity to collaborate with various departments across the company. You will work closely with teams in trading, technology, and operations to develop and sustain systems that have a firm-wide impact. By leveraging feedback from other groups and utilizing our custom monitoring tools, we aim to resolve production issues swiftly, conduct thorough root-cause analyses, and implement long-term solutions in a clean and efficient manner. We don't require you to have extensive experience; we are eager to hire intelligent problem solvers and guide them through their learning journey. You will train alongside seasoned team members in a hands-on environment, acquiring the skills necessary to make significant improvements to our infrastructure daily.

About the Program At Jane Street, we aim to provide a comprehensive glimpse into the exciting world of finance through our internship program. Throughout your internship, you will delve into innovative problem-solving techniques within your area of interest. Engage in stimulating classes, hands-on sessions, and collaborative discussions while applying what you learn in practical scenarios. As an intern, you will be matched with experienced full-time employees who will serve as your mentors, guiding you through meaningful projects that contribute to our operations. When you’re not working on your assignments, you’ll have access to our office amenities and educational resources, as well as opportunities to attend guest lectures, social events, and explore the aspects of our work that inspire you most. If you have not previously considered a career in finance, rest assured that many of our team members were once in the same boat. If you possess a curious mind, a collaborative nature, and a passion for tackling intriguing challenges, we believe you'll find your place here. Discover more about Jane Street’s internship program. About the Position As a Software Engineering intern, you will gain hands-on experience using OCaml, our primary programming language, in our daily operations, while also being exposed to essential libraries and tools integral to our internal systems. Depending on your project, you may also work with Python. During your internship, you will undertake one or two projects under the close mentorship of full-time software engineers. Mentors will craft your projects based on their current team objectives and are committed to assisting you in developing maintainable, high-quality software aimed for production. The projects you engage in will be diverse, ranging from high-performance trading systems to programming language design and more. For further insights, feel free to explore our interview and team placement processes, and get a sense of what our most recent intern projects entailed! About You We don’t require a background in finance, OCaml, functional programming, or any particular field. We seek intelligent individuals who thrive on solving complex problems. Your thought process and eagerness to learn are far more important to us than your existing knowledge.

About the RoleJane Street is seeking a skilled Data Engineer dedicated to transforming our trading operations through robust data management. This role is pivotal as we strive to gain a comprehensive and precise understanding of the data that drives our trading strategies.In this position, you will leverage a combination of proprietary and open-source tools to analyze datasets from diverse sources. Your responsibilities will include identifying anomalies, standardizing data formats and symbologies, automating ETL processes, and enabling our traders to derive insightful analytics.We value individuals who have a passion for exploring data and are adept at communicating their insights to various stakeholders, collaborating closely with both traders and software engineers.While prior experience in financial data is an advantage, we welcome talented engineers from diverse backgrounds and are committed to providing the necessary training.

About the Position Jane Street is on the lookout for an IT Operations Engineer to bolster our technology infrastructure by supporting, configuring, and maintaining a variety of systems. This includes desktop environments, network infrastructure, and diverse application platforms. Technology is the heartbeat of our operations. In this role, you will be instrumental in addressing tech support inquiries, setting up and configuring Windows, Linux, and macOS laptops, desktops, and servers. You'll also support our Windows domain infrastructure, monitor critical systems, and engage in projects aimed at enhancing operational efficiency. During quieter times, you'll have the opportunity to utilize automation tools like PowerShell to devise elegant, scalable solutions that streamline our processes. Your success in this role will hinge on your exceptional problem-solving skills and ability to communicate effectively with our technically adept users. We seek an individual who can troubleshoot in real-time, listen patiently, ask clarifying questions, and humbly acknowledge mistakes. You will receive immediate feedback and find satisfaction in seeing your solutions make a tangible impact on our business. This position is part of our global IT Operations team, which consists of engineers who monitor and manage our mixed Windows/Linux/macOS environments across a diverse computing landscape that spans multiple continents. Collaborating with specialized teams both within and outside the IT department, you will help create and sustain the infrastructure that underpins our trading operations. Please note that this role may involve occasional physical tasks, including lifting equipment up to 40lbs. About You A genuine passion for assisting others and solving technical challenges. A robust foundation in information technology and networking principles. Technical proficiency in networking, programming, or system administration. Familiarity with Windows Desktop/Server Operating Systems and best practices within a production setting. Practical knowledge of Active Directory, Group Policy, and other common Windows administrative subsystems. Clear, concise, and empathetic verbal communication skills. Strong written communication abilities for technical documentation and knowledge base upkeep. Willingness to work occasional evening or weekend hours. Familiarity with Linux or macOS operating systems is a plus. Additional technical proficiency in programming or scripting for Windows (especially PowerShell) or Linux (especially Bash) is also advantageous.

About the RoleAt Jane Street, we are continually seeking skilled software engineers to join our dynamic team across all offices. Technology is integral to our approach, empowering engineers to engage across all facets of our operations.We are strong advocates for functional programming, primarily utilizing OCaml, a statically typed functional programming language. In recent years, Python has emerged as a crucial tool within Jane Street’s research and trading domains, serving as the preferred language for data analysis, visualization, and machine learning tasks.Our commitment to open-source software is reflected in our daily practices, with over a million lines of our own code made available as open-source contributions.

About the PositionJoin Jane Street as we innovate and expand OxCaml, a specialized variant of OCaml designed for performance engineering. Your role will be crucial as we not only create and implement this programming language but also ensure our developers master its intricacies. That’s where you come in!We are seeking a talented and experienced educator who can create engaging educational materials and deliver effective courses to empower our engineers to excel in OxCaml. You will play a vital role in our internal training initiatives, enhancing our OCaml Bootcamp for new hires and developing advanced tutorials for seasoned developers eager to leverage OxCaml’s sophisticated features.This role presents a unique opportunity to collaborate closely with the language's designers and implementers, contributing to the educational framework that will shape the future of OxCaml at Jane Street.Here’s what we’re looking for:Adept in teaching, with proven skills in writing and presenting educational content effectively.A strong understanding of our technology stack, complemented by a passion for coding, as significant time will be dedicated to hands-on programming.Experience in curriculum development and teaching, alongside mentoring others who aspire to enhance their teaching skills.We encourage candidates with experience in teaching computer science topics within university environments, as well as those who have taught technical subjects in professional settings, to apply.

About the Position We are seeking a talented FPGA Engineer with a strong foundation in both software and hardware design to join our innovative team in developing cutting-edge FPGA-based applications. At Jane Street, we strongly believe in leveraging advanced tools to enhance the programming experience, making it faster, more enjoyable, and reliable. We apply these principles to our FPGA engineering efforts and are on the lookout for individuals passionate about utilizing programming language technology to optimize the design, testing, and validation of hardware systems. We employ Hardcaml, an OCaml library that allows for concise RTL hardware descriptions. You will gain significant exposure to the essential libraries and tools integrated into our development environment. No prior knowledge of Hardcaml is required. In this role, you will be integral to the design and implementation of new FPGA applications from the ground up, as well as refining our internal high-level design and testing tools. Your daily responsibilities will involve extensive use of OCaml and Hardcaml for RTL design and testing/integration, along with some exposure to Verilog and C. While experience with OCaml is not mandatory, a solid background in typed programming languages is advantageous. If you wish to explore more about our culture and processes, feel free to check out our interview process, meet some of our newest hires, or watch our OCaml All The Way Down talk and listen to the Programmable Hardware podcast episode.

About the Position Join our global team at Jane Street as an IT Security Engineer, where your extensive Windows engineering expertise and hands-on experience with contemporary security controls will play a pivotal role in safeguarding our IT platforms. You will be instrumental in enhancing the security of our internal IT and remote work environments through a blend of technical execution, consultation, and strategic influence across the IT team. We seek a candidate who possesses exceptional judgment and an eye for prioritizing intricate remediation efforts. Your insights will guide our mitigation strategies, while you provide essential technical counsel and decision-making support as required. Your responsibilities will include: Proactively proposing, designing, testing, implementing, and documenting advanced security controls. Coordinating and delivering security solutions across our IT platforms, while identifying opportunities for further automation of intelligent workflows. Developing scalable security controls, investigating emerging threats, creating new security tools, and spearheading vulnerability management initiatives. This role is part of our dedicated IT Engineering team, which monitors and manages our computing environment across three continents. Your analytical skills and expertise will be critical in supporting our colleagues' daily operations and ensuring our systems are maintained to the highest standards.

About the PositionJane Street is seeking a skilled ASIC Engineer who will play a vital role in the design, testing, and deployment of cutting-edge hardware solutions. As a member of our Ultra Low Latency team, you will work collaboratively with colleagues from diverse areas such as trading, networking, and research infrastructure. We value versatility and are looking for an individual who is eager to contribute across various projects and work with both FPGA and ASIC technologies.At Jane Street, we believe in the power of tools to enhance productivity, reliability, and overall satisfaction in hardware engineering. We proudly developed Hardcaml, an advanced hardware development toolchain embedded in OCaml. While prior knowledge of OCaml is not a prerequisite, we seek hardware engineers who are excited about leveraging better tools and are open to exploring innovative approaches.

Join Our Security Operations Team We are seeking a passionate, driven, and technically inquisitive individual with a strong focus on IT operations to become a valued member of Jane Street’s IT Security team. Your role will be pivotal in safeguarding our firm's IT systems and user identities through hands-on technical work, innovative problem-solving, and collaborative teamwork. Key responsibilities for this position include: Deploying, documenting, and implementing security controls at scale. Contributing significantly to our Vulnerability Management program to effectively detect and mitigate vulnerabilities. Providing expert guidance and support to the IT department and IT Operations team during security incidents. Collaborating with engineering teams to develop both technical and non-technical solutions addressing security concerns. Assisting in the creation and refinement of our team’s operational playbooks and procedures. We are looking for someone who thrives in collaborative environments, enjoys tackling complex challenges, and is adept at delegating and escalating tasks efficiently. This role emphasizes communication, as you will be responsible for translating intricate technical issues for diverse audiences while maintaining accuracy. We welcome applicants from varied backgrounds, but preference will be given to candidates with experience in code-driven or declarative environments and hands-on experience in security incident response.

About the Position Jane Street is seeking talented Software Engineers eager to design and develop the systems and tools that drive our firm. Our Software Engineers play a pivotal role across various departments, addressing real-world challenges from trading desks to accounting, as well as constructing foundational infrastructure like network monitoring and risk models. We are strong advocates of functional programming, primarily utilizing OCaml, a statically-typed functional programming language. Recently, Python has also become essential to Jane Street’s research and trading operations, serving as our primary language for data analysis, visualization, and machine learning. In addition to our internal projects, we value open-source software and actively incorporate it into our workflows. We've released over a million lines of code as open source and continually seek to contribute to projects like Mercurial, the OCaml compiler, and the OPAM package manager. We welcome engineers with experience in any programming language—many of our team members joined with minimal OCaml experience. To learn more about our interview process and to meet some of our newest hires, feel free to explore our website.

About the Position Jane Street is seeking a skilled Audio/Visual (AV) Engineer to design, implement, and maintain our advanced AV infrastructure. As a pivotal element of Jane Street's operations, our AV requirements are continuously evolving, ranging from traditional conference settings to sophisticated trading environments and hybrid collaboration spaces. In this dynamic role, you will oversee all AV systems, collaboration platforms, and teleconferencing services, which includes managing complex event venues (500+ person auditoriums), standard meeting rooms (4-50 person capacity), huddle spaces, trading floor communication systems, live event support, and digital signage/IPTV networks. We are looking for someone passionate about AV technology who is eager to address business challenges by researching, testing, and deploying innovative technologies in our fast-paced financial setting. Your responsibilities will encompass a wide scope, requiring you to act as the subject matter expert for AV systems. You'll maintain and support existing technologies while establishing design standards for new and expanding spaces. Providing exceptional technical support, whether during field installations or directly troubleshooting with end users, will be a key part of your role. Our AV Engineers also collaborate closely with our Technology and Infrastructure teams during expansion projects, ensuring that the infrastructure needs for each project are effectively met. Our team consists of AV generalists, and we expect everyone to contribute across all operational areas (builds, operations, event support). While this position will primarily focus on expansion and builds, success in this role requires adaptability to shift focuses and provide support wherever necessary.

Join our dynamic Machine Learning team at Jane Street, where we're seeking an innovative engineer with extensive experience in machine learning and a solid mathematical background. Your role will be pivotal in shaping the trajectory of our ML platform. Machine learning is integral to Jane Street's global operations. Our fast-paced trading environment offers a unique platform for rapid experimentation in ML, enabling us to seamlessly integrate new concepts. Our team comprises passionate individuals who value exceptional software engineering and the design of user-friendly APIs and systems. Your deep understanding of the ML ecosystem and various methodologies—be it neural networks, random forests, gradient-boosted trees, or advanced ensemble techniques—will be crucial for informed decision-making, ensuring we utilize the optimal tools for each challenge. You will also focus on refining research workflows to enhance our feedback loops. Successful ML engineers can grasp the mechanics of diverse modeling techniques and communicate the underlying mathematics effectively. If you haven't considered a career in finance before, rest assured, you're not alone; many of our team members started in similar positions. While we don't have a rigid set of qualifications, your curiosity and passion for solving complex problems will greatly contribute to our team culture.

Join our dynamic Machine Learning team at Jane Street, where we are seeking a talented Machine Learning Engineer with extensive experience in the field and a solid mathematical background. You will play a crucial role in shaping the direction of our cutting-edge ML platform. Machine learning is a vital component of Jane Street's global operations. Our rapidly evolving trading environment provides a unique platform for ML experimentation, enabling us to seamlessly integrate innovative ideas. Our team is composed of passionate individuals dedicated to the art of software engineering and the creation of user-friendly APIs and systems. We depend on your deep understanding of the ML landscape and various methodologies—be it neural networks, random forests, gradient-boosted trees, or advanced ensemble methods—to facilitate informed decision-making and ensure we employ the most effective tools for each challenge. Your contributions will also focus on refining research workflows to enhance feedback loops. Successful candidates will grasp the underlying mechanics of different modeling techniques and possess the ability to articulate the mathematical principles that govern them. If finance is a new frontier for you, you're not alone—many of us were once in your shoes. While we don't have a strict checklist of qualifications, if you possess a curious mind and a drive to tackle intriguing challenges, we believe you’ll thrive in our environment.

About the PositionJane Street is on the lookout for a dedicated Paralegal to join our dynamic Legal & Compliance team. In this pivotal role, you will play a vital part in managing contracts—ranging from financial agreements to vendor contracts and leases. Your organizational skills will be crucial as you handle workflows, maintain databases, and support daily legal operations and various ad hoc projects.Collaborating with seasoned professionals, you will help streamline processes and enhance the systems that keep our legal operations efficient. As a primary point of contact, you will engage with diverse teams across Jane Street, including traders, technologists, procurement specialists, market data analysts, and engineering personnel.Key responsibilities include:Collecting signatures, drafting, blacklining, proofreading, scanning, and completing essential forms.Organizing and upkeeping centralized directories, contract templates, and supporting documents.Reviewing and preparing various legal documents, including onboarding materials, Powers of Attorney, Non-Disclosure Agreements, service and vendor contracts, leases, and more, while ensuring proper filing and maintenance in our database.Preparing and maintaining lease abstracts for our offices, data centers, and co-locations.Facilitating data collection and provision for stakeholders related to their projects, while implementing process improvements that enhance efficiency and scalability in our legal operations and contract workflows.About YouA Bachelor’s degree accompanied by 3+ years of administrative or paralegal experience.Experience with corporate or financial transactions at a trading firm, hedge fund, law firm, or private equity firm, or with vendor/procurement and leasing within financial services or tech.Self-motivated with a strong independent work ethic.Exceptional organizational skills with the ability to manage competing priorities effectively.Strong communicator with excellent interpersonal skills.Proficient in database management, project management, and AI tools.A reliable and flexible team player with a courteous demeanor.Excellent computer skills, including proficiency in MS Word, Excel, Google Workspace, and web-based portals.A notary license is preferred or a willingness to obtain one.

About the Opportunity We are seeking a proactive and skilled Cybersecurity Engineer to enhance the security framework of our applications, data, infrastructure, and operational processes within our Cybersecurity team. This position uniquely blends technical prowess and interpersonal skills, allowing you to collaborate across various teams within the firm. You will guide teams in analyzing the security implications of design choices and instilling security into applications from inception. Your offensive security background will be instrumental in identifying threats. You will delve into technical intricacies to craft tailored security solutions and devise innovative strategies for complex challenges. Proficiency in threat modeling and the ability to convert security principles into tangible architectural improvements are key aspects of this role. Furthermore, you will engage with system owners who possess a deep understanding of their applications but may overlook potential vulnerabilities. Your role will involve partnering with them to identify and mitigate risks while balancing the need for security with business objectives. As part of our Cybersecurity team, you'll collaborate with a talented group of programmers and security professionals committed to safeguarding the organization. Our work spans a diverse array of topics, including software engineering, DevOps, risk analysis, security governance, and cyber awareness.

About the PositionJane Street is seeking a highly skilled Senior Network Engineer to join our team. In this role, you will be instrumental in scaling our network infrastructure to meet the growing demands of our business. You will drive standardization through automation and explore opportunities to leverage AI for operational improvements.Our diverse distributed systems operate on a multi-vendor, highly available network infrastructure, handling various traffic profiles ranging from high-speed trading to everyday internet connectivity. A typical day in the Network Engineering team includes:Collaborating on new data center and colocation initiatives, optimizing WAN routing, and engaging in cross-team design projects.Interfacing with stakeholders to assess business needs and develop innovative network features and capabilities.Leading reactive support tasks and proactive infrastructure improvements, with a focus on thorough documentation to minimize outages and enhance troubleshooting.Exploring AI/ML-driven enhancements to streamline operations and continuously improve service quality.Utilizing your networking expertise to scale our team's infrastructure while maintaining high standards for performance and reliability.Documenting solutions and processes to enhance team efficiency, demonstrating meticulous attention to detail.If you are passionate about innovating within a complex network ecosystem, enjoy building scalable systems and documentation, and are curious about how AI can refine network operations, this role offers a platform to make a significant impact at Jane Street. We look forward to learning from your expertise and unique perspective.

At Jane Street, we're seeking a skilled Macro Analyst to support our global trading and research teams in analyzing macroeconomic and geopolitical factors affecting assets. The ideal candidate is adaptable, able to quickly familiarize themselves with new regions or subjects, develop insightful analyses, and apply these insights to broader market questions. Your expertise in global macro topics will be crucial in enhancing our trading strategies.Key Responsibilities:Engage in in-depth discussions with traders and researchers, providing macroeconomic updates and quantitative analyses, and clearly articulating your data-driven insights.Collaborate with global sell-side sales and research contacts, synthesizing broker insights and forming your own opinions.Conduct comprehensive analyses into specific geographies or macro topics, from formulating relevant questions and gathering data to deriving conclusions and recommendations based on both quantitative and qualitative assessments.

About the PositionJane Street is seeking a skilled Power Analyst to join our dynamic team. In this role, you will be instrumental in pricing and executing trades within the power markets. Your responsibilities will include developing models that analyze cross-commodity correlations, simulating returns for various strategies, and enhancing our current desk strategies to achieve optimal performance.About You5+ years of experience as an analyst within power marketsStrong analytical mindset with proficiency in probability and statisticsAbility to thrive in a fast-paced, collaborative environmentExcellent communication and interpersonal skillsMotivated and eager to learn, adaptable, and responsibleCoding skills are a plus