Software Engineer at Jane Street | Hong Kong

About the Position Join Jane Street as a Software Engineer and play a vital role in designing and developing the systems and tools that drive our firm. Our software engineers are integral to various teams—from trading desks to accounting—solving real-world challenges and building essential infrastructure, such as implementing network monitoring and risk mode…

About the PositionAt Jane Street, we are perpetually on the lookout for talented software engineers across all our offices. Technology lies at the heart of our operations, and our engineers play a pivotal role in every facet of our business.We are staunch advocates of functional programming, utilizing OCaml—a statically typed functional programming language—as our primary tool. Recently, Python has emerged as an essential component of Jane Street’s research and trading endeavors, serving as the preferred language for data analysis, visualization, and machine learning.Our commitment to open source software is unwavering; we incorporate it into our daily work and have released over a million lines of our own code as open source.About YouExceptional programming skillsA profound passion for technology and experience across various domains. We value diverse expertise from machine learning and systems administration to programming language design.Strong interpersonal skills are essential, as our software engineering process is highly collaborative, and we seek individuals who thrive in small, close-knit teams.While experience with functional programming, OCaml, Python, or finance is not a prerequisite, we are eager to hire talented engineers and provide the necessary training.Fluency in English is required.To gain insights into our software engineering interview process, please visit our interview preparation page.If you represent a recruiting agency and wish to collaborate with us, please contact agency-partnerships@janestreet.com.

About the Position Join Jane Street as a Data Engineer, where you will play a pivotal role in understanding, managing, and sharing the data that drives our trading strategies. At Jane Street, we believe that a deep and accurate grasp of data is fundamental to our success. In this role, you will leverage a combination of in-house and open-source tools to analyze diverse datasets from multiple sources. Your responsibilities will include identifying anomalies, standardizing formats and symbologies, automating ETL processes, and streamlining data access for our traders to derive meaningful insights. You should be passionate about diving into data, interpreting your findings, and collaborating effectively with traders and software engineers across the organization. While experience with financial data is a plus, we welcome talented engineers from all backgrounds and are willing to provide the necessary training.

About the Position As a Linux Engineer at Jane Street, you will play a vital role in managing the foundational infrastructure that supports the firm’s technological framework. Our team consists of dedicated Systems Engineers, Administrators, and Programmers, all focused on enhancing the platform that drives our production trading systems. With a blend of proprietary and open-source software, you will have the opportunity to explore and innovate at all levels of our technology stack. On any given day, your tasks may include debugging kernel performance, creating management tools, or addressing production challenges in real-time. Solving complex systems problems is our forte. We prioritize deployment automation, scalable configuration management, and meticulous monitoring in our ongoing endeavors. While we automate as much as possible, it's not due to laziness; we believe that automation minimizes errors and reduces our overall workload—plus, we find it enjoyable! Being part of our group means collaborating with nearly every other department within the company. You will engage directly with colleagues in Trading, Technology, and Operations to develop and maintain systems that have a company-wide impact. By utilizing feedback from various teams and our specialized monitoring tools, we aim to swiftly resolve production issues, conduct thorough root-cause analyses, and implement long-lasting solutions in an efficient manner.

About the Internship ProgramAt Jane Street, our aim is to immerse you in the experience of working with us full-time. Throughout your internship, you will tackle exciting challenges in your field of interest through engaging classes, interactive sessions, and collaborative discussions, allowing you to apply what you've learned in a practical setting.You will be paired with experienced professionals who will mentor you as you work on genuine projects that are critical to our operations. When not engaged in your project, you'll have ample opportunities to utilize our office amenities, explore physical and virtual educational resources, attend guest lectures and social events, and delve into the areas of our work that inspire you the most.If you’ve never considered a career in finance, you’re not alone. Many of our team members started from the same place. If you possess a curious mindset, a collaborative spirit, and a drive to solve intriguing problems, we believe you’ll thrive here.About the PositionAs a Linux Engineering intern, you will collaborate closely with full-time staff to learn about maintaining and enhancing the vital infrastructure that supports our technology, including our production trading systems. Your daily tasks may involve debugging kernel performance, developing management tools, or addressing production issues in real-time. Our combination of in-house and open-source software empowers us to innovate at every level.During the internship, you will work on up to two projects, under the guidance of full-time employees who created them. Some projects will tackle big-picture questions we are still exploring, while others will focus on building innovative solutions. Your project assignments will ensure you gain a comprehensive understanding of the diverse problems we address daily, from resolving production issues swiftly to conducting thorough root-cause analyses and implementing sustainable fixes effectively.You will have a unique opportunity to see how our team collaborates with various departments, creating firm-wide solutions. We strive to automate as much of our work as possible, as we believe automation not only reduces errors but also lightens our workload—plus, it's enjoyable!

Join our dynamic Machine Learning (ML) team at Jane Street, where we seek an experienced engineer with a solid background in machine learning and strong mathematical skills. You will play a key role in shaping the future of our ML platform. At Jane Street, machine learning is an essential part of our global operations. Our fast-paced trading environment serves as a unique platform for ML experimentation, enabling us to swiftly implement innovative ideas with minimal barriers. Our team is composed of passionate individuals who appreciate software engineering and are dedicated to creating user-friendly APIs and systems. Your extensive knowledge of the ML ecosystem and familiarity with various methodologies—such as neural networks, random forests, gradient-boosted trees, or advanced ensemble methods—will be crucial in guiding our decision-making processes to select the appropriate tools for specific challenges. Additionally, you will focus on optimizing research workflows to enhance our feedback loops. Successful candidates will be adept at understanding the mechanics of different modeling techniques and will possess the ability to articulate the underlying mathematics. If you have previously considered a career in finance, you'll find many colleagues who were in the same position before joining us. While we do not have a stringent list of qualifications, a curious mindset and a passion for solving complex problems will help you thrive in our environment.

About the RoleJane Street is seeking a skilled Unified Communications Engineer to enhance, monitor, and manage our global voice and video communication infrastructure. As a vital member of our IT group, you will be responsible for delivering innovative solutions in a dynamic environment while ensuring minimal disruption to daily operations.The Unified Communications team focuses on end-user setup, asset management, and all aspects of collaboration and telephony infrastructure. Your projects will involve optimizing tools and monitoring systems, refreshing meeting room hardware, and implementing software and hardware configuration changes globally, all while minimizing downtime for collaboration services.As a Unified Communications Engineer, you will excel at multitasking, monitoring alarms from our voice and video systems, and managing project-related tasks, while serving as a key escalation point for users and other technology teams. You will collaborate daily with various technical teams across the organization, including IT Operations, Cybersecurity, and Networking, to provide capacity planning, establish standards and best practices, and enhance documentation across our global UC infrastructure.The ideal candidate will be passionate about tackling complex challenges and delivering robust, flexible technical solutions to support our users.

About the PositionJane Street is seeking a skilled Campus Technology Recruiter to identify and onboard exceptional interns for our Software Engineering teams. As we aim to expand and diversify our recruitment initiatives, your contributions will be vital in navigating the competitive landscape.We are looking for a proactive individual who can independently manage their recruitment pipeline while introducing innovative ideas to refine our processes. This role will involve tackling complex challenges and ensuring meticulous attention to everyday details.During the campus recruiting season, you will engage with a high volume of full-cycle candidate management. Your insights and experiences will be invaluable in enhancing our recruitment strategies.Our team has a proven track record of nurturing talented recruiters, guiding them to realize their full potential. We provide a comprehensive onboarding experience that immerses you in our overarching strategy and its application in our daily operations. Continuous professional development will be supported through hands-on training and mentorship.Our Recruiting team is a dynamic and close-knit group that values the people at Jane Street as our greatest asset. We are passionate about our work and dedicated to connecting individuals with their ideal teammates.With two decades of experience, we have created an engaging search and interview process that has successfully identified nearly 3,000 exceptional hires globally. Your expertise will be instrumental in driving our recruitment strategy forward.

About the Position Join our dynamic team at Jane Street as a Data Centre Engineer, where you will play a crucial role in ensuring the safety and accessibility of our data around the clock. This position blends hands-on work within our data and colocation centres with strategic process thinking and project management. Your responsibilities will involve designing, constructing, scaling, and maintaining our regional data and colocation centres. Collaborate with talented professionals across various disciplines at Jane Street to optimize our data environments and proactively address potential issues. You will be part of a multidisciplinary team that includes members from Network, Server, Facilities Engineering, Market Data, and Trading teams, as well as external data centre operators, colocation providers, and hardware vendors. Together, you will: Develop deployment plans for new equipment following data centre best practices. Coordinate logistics across multiple locations, including procurement, shipping, and inventory management of equipment and cabling. Install and configure server operating systems in a PXE environment (fundamental Linux knowledge is essential for network equipment deployment). Install, connect, configure, and troubleshoot various network and server equipment. Ensure our data centres meet the highest standards of security, organization, documentation, safety, cleanliness, and supply management. This role is vital for our daily operations in Hong Kong and significantly impacts our remote locations throughout Asia.

About the PositionJoin our dynamic trading team where we leverage proprietary models to execute over a million trades on busy days. As a Quantitative Trader, you will collaborate with fellow traders to identify and capitalize on pricing inefficiencies, develop advanced trading models, manage risk, explore new products, and venture into emerging business sectors. Experienced traders provide guidance and mentorship to newcomers, who will initially assist and gradually take on more responsibilities as they demonstrate their capabilities.At Jane Street, we view ourselves as a technology-driven firm as much as a trading entity. Our primary programming language is OCaml, a statically-typed functional programming language, and we proudly host the largest team of OCaml engineers in any industrial setting.

About the Position Join our dynamic Cybersecurity team as a Cybersecurity Engineer focused on Threat Modeling, where you'll play a crucial role in enhancing the security framework of our applications, data, infrastructure, and processes. This position is ideal for those with a hands-on approach, as it requires technical expertise to identify and mitigate vulnerabilities while collaborating with teams across the organization. Your experience in offensive security will be fundamental in analyzing potential threats and developing strategic security solutions tailored to our unique challenges. You'll engage deeply with technical details and contribute to architectural improvements, translating security principles into actionable strategies. This role also involves close collaboration with system owners who possess intricate knowledge of their applications but may overlook potential exploits. You'll work with them to identify vulnerabilities, ensuring a balance between security measures and business objectives. As a valued member of our Cybersecurity team, you'll collaborate with a talented group of programmers and security specialists committed to safeguarding our organization. Our initiatives span a variety of areas, including software engineering, DevOps, risk analysis, security governance, and cyber awareness.

About the Position At Jane Street, we aim to provide you with an authentic experience of what it’s like to work full-time as a Machine Learning Researcher, coupled with an unparalleled educational journey. Collaborate with seasoned ML Researchers on projects specifically chosen for their innovative ML concepts and their applicability to real-world systematic trading strategies. Engage in challenging classes and activities to deepen your understanding of market dynamics while honing your skills in utilizing established methods alongside our unique approaches to train effective models. Our environment blurs the lines between research, technology, and trading. As our strategies evolve in complexity, collaborative efforts are crucial for pushing the limits of possibility. We operate with petabytes of data, leveraging a computing cluster with hundreds of thousands of cores, and a growing GPU cluster featuring tens of thousands of high-performance GPUs. The nature of trading introduces unique challenges, such as large models and nonstationary datasets in a competitive multi-agent landscape, prompting us to explore innovative techniques. During your internship, you will primarily focus on projects in close partnership with experienced ML Researchers at Jane Street. You may conduct comprehensive studies of untapped datasets, experiment with new modeling paradigms for complex issues, or explore pioneering approaches that are still in development. The problems we tackle often lack clear-cut solutions and require insights from colleagues across diverse expertise areas. Tasks may include delving into market data, tuning hyperparameters, troubleshooting training challenges, or analyzing model predictions. Please note that due to the IP-sensitive nature of our machine learning research, it is unlikely that any findings from the internship will be suitable for external academic publication. About You If you haven't considered a career in finance before, you're not alone; many of us were in the same position before joining. If you possess a curious mind and a passion for tackling intriguing problems, you will likely thrive in our environment. Ideal candidates should be: A PhD student or postdoc engaged in empirical ML research, or possess equivalent research experience. Interested in applying logical and mathematical reasoning to diverse problems. Curious about the machine learning landscape and eager to apply cutting-edge techniques from various domains. Proficient with a broad range of models and methodologies. Capable of rapidly implementing and iterating your ideas using Python and your preferred ML framework. Keen to ask questions and explore solutions collaboratively.

About the Role Jane Street is seeking a highly skilled Senior Network Engineer to enhance our network architecture as we adapt to growing business demands. This role will involve driving automation for standardization and investigating AI opportunities to optimize our operations. Our extensive distributed systems operate on a robust, multi-vendor network infrastructure capable of handling diverse traffic profiles, from high-speed trading to everyday internet connectivity. As a member of the Network Engineering team, your daily responsibilities will include: Collaborating on innovative projects related to data center expansions, WAN routing enhancements, and cross-team designs. Engaging with stakeholders to identify business needs and develop cutting-edge network features. Leading both reactive support and proactive infrastructure improvements, with a strong emphasis on thorough documentation to minimize outages and facilitate troubleshooting. Leveraging your expertise to explore AI and machine learning enhancements that streamline our operations and improve service quality. Documenting solutions and processes meticulously to empower team efficiency. If you have a passion for innovating within complex network ecosystems and are eager to make impactful contributions at Jane Street, we would love to hear from you!

About the Position Join Jane Street as a Quantitative Trader, where you will engage in the identification of market signals, execution of innovative trading strategies, and the development of sophisticated quantitative models. Your role will encompass conducting in-depth statistical analyses, crafting algorithmic trading systems, managing risk effectively, and exploring new business opportunities. Our trading desks thrive in a collaborative environment, where you will work closely with seasoned traders dedicated to mentoring and supporting newcomers. Expect to take on substantial trading responsibilities within just weeks of joining, complemented by our comprehensive year-long educational curriculum. At Jane Street, we blur the lines between research, technology, and trading. As our strategies evolve, collaboration becomes increasingly important, allowing us to push the limits of what's achievable. We handle vast amounts of data, leveraging a computing cluster with hundreds of thousands of cores and a growing GPU cluster featuring thousands of high-performance GPUs. Our approach is not about cookie-cutter modeling solutions; instead, we embrace a variety of statistical and machine learning techniques, ranging from linear models to deep learning, tailored to fit each unique challenge.

About the RoleJoin our dynamic Workplace Services and Experience team as an Events Specialist, where you will play a pivotal role in enhancing the events landscape at our Asia offices. We are seeking an individual with a strong service orientation who thrives on building relationships across various teams to understand their objectives and tailor events that resonate with their needs.At Jane Street, our colleagues are the cornerstone of our success, and we are dedicated to creating opportunities that foster connections among our team members and enhance engagement with our culture. Our events are designed not just to support the firm’s overarching goals but also to keep our employees motivated and excited about their work environment. Additionally, these events help shape how potential candidates, including students and professionals, perceive our firm.In this role, you will be instrumental in designing, planning, and executing events for both current employees and prospective college recruits within our Asia offices. Your responsibilities will include:Building and nurturing relationships across the firm to gain insights into our culture and team dynamics.Overseeing the complete event lifecycle, including venue selection, catering, entertainment, transportation, promotion, RSVP management, and on-site support during events.Collaborating with our Recruiting, Human Resources, Workspace Services, and other internal teams to ensure cohesive event planning.Maintaining a comprehensive database of event details and associated costs.Coordinating with our Legal team to manage all event-related contracts.

About the Position At Jane Street, we aim to provide you with an authentic experience of what it means to be a quantitative trader, paired with an exceptional educational opportunity. You will collaborate with seasoned quantitative traders who will guide you in recognizing market signals, analyzing and executing strategies, developing quantitative models, performing statistical analyses, and cultivating trading intuition. Your journey will involve close collaboration with two mentors on projects that reflect their everyday responsibilities, allowing you to experience the diverse challenges we tackle daily. Previous projects have encompassed analyzing new or existing datasets, training predictive models, simulating innovative trading strategies, crafting tools for production use, and exploring significant questions that remain unresolved. This hands-on experience is complemented by intensive classes, workshops, and team-based mock trading sessions. These activities will expose you to the dynamics we encounter in actual markets, highlight our role in enhancing market efficiency, and foster your understanding of trading and teamwork. At Jane Street, we intentionally blur the lines between research, technology, and trading. As we develop increasingly sophisticated strategies, close collaboration is vital in pushing the limits of what’s achievable. We handle petabytes of data, utilize a computing cluster with hundreds of thousands of cores, and maintain a growing GPU cluster with thousands of high-performance GPUs. We believe in tailored modeling solutions and are enthusiastic about applying various statistical and machine learning techniques, from linear models to deep learning, depending on the specific challenge. As a quantitative trading intern, you will also have the chance to engage in one elective tailored to your interests. These electives comprise specialized classes and immersive activities designed to offer you an in-depth perspective on various facets of quantitative trading at Jane Street: Machine Learning, Modeling, and Data Science You will discover how Jane Street employs advanced machine learning and statistical methods to create models and predictions with extensive datasets of both real and simulated market data. You’ll learn to train and utilize various machine learning models while understanding the distinctions between theoretical machine learning and its application to intricate financial data. Algorithmic Trading and Market Microstructure You will explore the complete process of developing an algorithmic trading strategy, analyzing market data to establish a tradable fair value and more.

About the RoleThe Operations team plays a pivotal role in Jane Street's trading activities. This dynamic team oversees the essential processes that link us to external partners as well as facilitate internal operations. Our objective is to efficiently and accurately manage the flow of assets, information, and ideas. We are passionate about solving complex challenges and seek to recruit outstanding, intelligent individuals who are eager to contribute to our mission.As part of this integrated team, you will be involved in crucial aspects such as trade settlements, record and position management, and cash management. You will collaborate closely with external service providers and trading partners, alongside colleagues from our local and global offices, addressing challenges that arise from our intricate trading operations to ensure seamless processes.If you haven’t previously considered a career in finance, you’re not alone; many of our team members began their journey in this field at Jane Street. We value your thought process and eagerness to learn more than prior experience. You will gain exposure to a diverse range of financial products, including equities, bonds, ETFs, futures, and swaps, starting from your very first day.

About the Position Jane Street is seeking a seasoned Payroll Specialist to become a vital member of our global team. In this role, you will oversee payroll processing and compliance for Hong Kong and Australia while providing essential backup support for Singapore, India, and the UAE. Your primary responsibilities will include the timely and accurate preparation of payrolls, ensuring compliance with related regulations, coordinating with vendors, and delivering exceptional customer service by addressing payroll-related inquiries from colleagues. You will collaborate closely with our HR, Recruiting, and other internal teams to ensure all tax reporting and benefits administration are managed accurately and responsibly. This includes working alongside our Workday team on system updates and enhancements. Additional responsibilities will encompass: Ensuring the timely and accurate processing of payrolls and pension contributions for Hong Kong and Australia Updating payroll records, monitoring compensation changes, and executing month-end, quarterly, and annual processes Liaising with the HR team regarding employee payroll and MPF matters Providing friendly and prompt customer service to Jane Street employees regarding payroll queries Preparing monthly payroll reports and conducting reconciliations Reviewing year-end, commencement, and departure forms (e.g., IR56B, 56E, 56F, 56G, FBT tax returns) Supporting global mobility initiatives Assisting during audits Maintaining payroll and internal control procedures Keeping abreast of best practices and current payroll laws and regulations Recommending improvements to streamline and automate payroll processes At Jane Street, we strive to find the best solutions to complex challenges, and this extends to our payroll function. Each member of our team plays a crucial role in fostering a collaborative and welcoming work culture. We expect you not only to complete tasks but also to contribute to the evolution of our payroll systems, making them increasingly effective and efficient. The ideal candidate will be a proactive self-starter, detail-oriented, deadline-focused, and excited by a fast-paced work environment with ample opportunities for growth.

About the RoleJane Street is seeking a dynamic and results-oriented Technical Program Manager to support and coordinate our engineering projects. Our cutting-edge technology is pivotal to our operations, and this position offers a unique chance to collaborate with our engineering team as we enhance and refine Jane Street's trading technology.In this role, you will leverage your technical expertise daily, guiding projects from inception to completion. This includes setting objectives, establishing timelines, monitoring progress, managing developer resources, identifying potential risks, and liaising with relevant departments. You will also be responsible for communicating project schedules, priorities, and progress updates to the broader organization.Excellent communication skills and the ability to juggle competing priorities are essential for successful collaboration with various teams at Jane Street—ranging from developers and business units to operations and external financial partners—ensuring that each project is delivered on time and meets or exceeds expectations.Our environment promotes innovative problem-solving, encouraging you to think creatively when developing processes and tools for your projects. The ideal candidate will be a strategic thinker who aligns project goals with broader team objectives.This position is situated within Jane Street's technology group, which is responsible for designing, implementing, and maintaining the infrastructure that supports our trading activities. You'll gain valuable insight into a diverse array of global market systems as you work to enhance them. Success in this role requires a passion for working independently within small teams, a willingness to learn quickly, and the ability to make impactful decisions.At Jane Street, the “P” in TPM can encompass a range of responsibilities. Depending on the team and the context, you may find yourself straddling the roles of Program Manager and Product Manager. Therefore, adaptability and a hands-on approach to problem-solving are crucial. We invite you to apply for both the Technical Program Manager and Technical Product Manager positions, as your qualifications will be assessed for the best fit.

About the Position Jane Street is seeking talented Quantitative Researchers to develop innovative models, strategies, and systems for pricing and trading financial instruments. In this role, you'll leverage your expertise in experimental design, data generation, time series analysis, feature engineering, and model building to analyze financial datasets. You'll collaborate closely with a team of driven professionals who are eager to challenge and enhance your methodologies. At Jane Street, our researchers, engineers, and traders work side by side, fostering an environment of collaboration. We handle petabytes of data and operate a vast GPU cluster featuring tens of thousands of high-performance GPUs. Your day may involve delving into market data, fine-tuning hyperparameters, troubleshooting distributed training issues, or analyzing how our models perform in live trading scenarios. We reject a “one-size-fits-all” approach to modeling; instead, we embrace diverse statistical and machine learning techniques, ranging from linear models to deep learning, tailored to suit specific challenges. The most successful candidates will possess a strong curiosity about how their contributions influence our broader trading strategies, with a focus on translating their insights into actionable solutions.