Linux Engineering Manager at Jane Street | London

Join System Canada Technologies as a Linux Systems Configuration Engineer, where you'll play a crucial role in optimizing and configuring Linux systems to enhance operational efficiency. Collaborate with a dynamic team to ensure seamless deployment and maintenance of systems that support our innovative technology solutions.

The Trade Desk is a leading global technology firm dedicated to establishing a more accessible and transparent internet through principled and intelligent advertising solutions. Our platform processes over 1 trillion queries daily, operating at an unparalleled scale. We pride ourselves on nurturing an award-winning culture rooted in trust, ownership, empathy, and collaboration. We celebrate the distinctive experiences and viewpoints that every individual contributes to The Trade Desk, and we are devoted to cultivating inclusive environments where everyone can express their authentic selves daily. Are you passionate about tackling complex challenges on a grand scale? Do you long to be part of a vibrant, globally-connected team where your efforts will significantly impact the creation of a better media ecosystem? Discover why Fortune magazine regularly recognizes The Trade Desk as one of the best small to medium-sized workplaces worldwide. About the Role: We are on the lookout for a Lead Systems Reliability Engineer to enhance our engineering team, focusing on the development and upkeep of our data-driven platform. Utilizing cutting-edge technologies such as Aerospike, MongoDB, and Kafka, we execute numerous real-time activities, achieving a remarkable p99 latency of under 1 millisecond on the backend! If you thrive on tuning, performance testing, troubleshooting, automation, and operating at scale, and if you find excitement in testing next-gen hardware, evaluating data access patterns, and architecting automation for distributed systems, we want to hear from you!

About the Position Join our dynamic team as a Linux Engineer responsible for maintaining the essential infrastructure that supports Jane Street’s technology ecosystem. Our dedicated group of Systems Engineers, Administrators, and Programmers is pivotal in upholding and 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 across various levels of our systems. Each day presents a new challenge, from debugging kernel performance and developing management tools to swiftly resolving production issues. Our current initiatives focus on deployment automation, scalable configuration management, and meticulous monitoring. We embrace automation not out of laziness but because it minimizes errors and alleviates our workload, while also being an enjoyable part of our work. Working with us means engaging with nearly every aspect of the company. We collaborate directly with teams in trading, technology, and operations to design and maintain systems with a comprehensive scope. By leveraging feedback from various departments and utilizing our custom monitoring tools, we aim to quickly address production challenges, conduct thorough root-cause analyses, and implement sustainable solutions. We seek individuals who may not have extensive experience but are intelligent problem solvers eager to learn. You will be mentored by our seasoned team members in a hands-on environment, gaining insights into how we achieve meaningful improvements to our infrastructure daily.

Join Assystem as a Mechanical Configuration Engineer in London, where you will play a crucial role in ensuring the integrity and coherence of mechanical designs throughout the product lifecycle. You will collaborate with multidisciplinary teams to optimize configurations and enhance performance, contributing to innovative engineering solutions.

About the PositionAs a Linux Engineer at Jane Street, you will be integral to the vital infrastructure that supports our technology landscape. Our team comprises dedicated Systems Engineers, Administrators, and Programmers focused on maintaining and enhancing the platform that drives our production trading systems. Our unique blend of in-house and open-source software empowers you to explore and innovate at every level. Each day presents opportunities to debug kernel performance, develop management tools, or tackle production issues in real time. We thrive on solving complex systems challenges.Our ongoing projects emphasize deployment automation, scalable configuration management, and meticulous monitoring. While we automate as much as possible, it's not out of laziness. We believe that automation minimizes errors and reduces workloads, not to mention that it adds an element of enjoyment to our tasks.Being part of our group opens avenues to collaborate with various departments across the company. We engage directly with colleagues in Trading, Technology, and Operations to design and maintain systems that have a company-wide impact. Utilizing feedback from other teams and our tailored monitoring tools, we aim to swiftly resolve production issues, conduct thorough root-cause analyses, and implement long-term solutions in a clean and robust manner.

About Five RingsFive Rings is a leading proprietary trading firm dedicated to merging strategy, innovation, and technology to excel in today's global markets. With offices located in New York, Boca Raton, London, and Amsterdam, we engage in trading across a diverse range of domestic and international markets, from the well-established to the highly specialized. Our team is driven by a constant pursuit of new opportunities, thorough risk and reward analysis, and the development of effective strategies and tools to seize these opportunities.At Five Rings, we foster an open culture that promotes the exchange of knowledge and ideas across all areas of the firm.About the RoleWe are in search of a proactive and skilled professional to join our expanding systems administration team. As a Systems Administrator, you will manage the workstations and servers that support our rapidly growing trading operations. Your responsibilities will encompass all systems work on both desktops and within our data centers, while also providing frequent interaction with users across various levels within our organization.We operate primarily on Linux systems for both our servers and trader desktops, with minimal use of Windows servers and desktops as needed.

Maven Securities Holding Ltd is a distinguished proprietary trading firm that adeptly allocates internal capital across a range of strategies, including discretionary, systematic, and market-making approaches. Our team's extensive expertise encompasses traders, engineers, and technologists, all committed to optimizing our efficiency as a leading liquidity provider for globally traded derivatives. At Maven, we foster a relaxed yet rewarding culture that highly values exceptional performance. With offices located in London, Amsterdam, Hong Kong, New York, and Chicago, our Infrastructure team comprises open-minded technologists dedicated to the continuous enhancement of the end-to-end resiliency, scalability, visibility, and supportability of Maven's trading systems. The Team and the Role The Linux Engineering team is tasked with the deployment, maintenance, and stability of Maven's Linux server environment. This estate spans 10 data centers across Europe and the US, supporting all trading applications. Our infrastructure includes both bare-metal deployments and containers, facilitated by an expanding array of Kubernetes clusters, all operating on-premises. The team operates from Chicago and London, covering both European and US market hours. We proactively monitor our infrastructure for any faults and performance issues, translate technical challenges for our trading teams, design and test new hardware, kernels, and operating systems, manage centralized storage arrays that support our data pipelines, and stay up-to-date with the latest developments in the Linux open-source community. We leverage a variety of open-source tools to extract comprehensive data from our platform and dedicate time to thoroughly investigate issues to ensure we maintain a clear understanding of our environment.

Hudson River Trading (HRT) is seeking a talented Senior GPU Systems Engineer to join our dynamic Research and Development team. In this pivotal role, you will play a crucial part in scaling and advancing our sophisticated HPC/AI research infrastructure. Collaborating with a diverse team of experts, you will ensure our trading and research operations run seamlessly 24/7 across the globe. Your responsibilities will include the design and optimization of extensive GPU compute clusters, identifying and resolving performance bottlenecks, and automating system deployment and monitoring across thousands of nodes. This is a high-impact opportunity that requires innovative thinking and technical expertise in a fast-paced environment.

Hudson River Trading seeks a Trading Systems Engineer to join the Trading Systems Infrastructure team. This group builds and maintains the technology behind global trading operations. Their work supports high performance and reliability for the ultra-low latency operating systems, automation tools, and development platforms that keep trading strategies running worldwide, around the clock. Role overview The Trading Systems Engineer will help support and improve real-time production trading environments. The work centers on solving challenges that require high availability, high throughput, and ultra-low latency. This role contributes to the development and automation of essential infrastructure components, working alongside a team committed to keeping trading systems operating smoothly at all times. What you will do Support and improve real-time production trading environments Address challenges involving high availability, high throughput, and ultra-low latency Contribute to developing and automating critical infrastructure Collaborate with a team focused on system reliability and uptime Requirements Experience with coding and automation Strong interest in enhancing technology stacks Ability to solve complex technical problems in demanding environments Comfort working where uptime and performance are essential Locations Austin, TX, United States Boulder, Colorado, United States Chicago, Illinois, United States London, United Kingdom New York, NY, United States Seattle, Washington, United States

Join Hudson River Trading (HRT) as a Systems Engineer within our dynamic Research & Development team. We are at the forefront of technology, building and maintaining expansive distributed compute clusters and multi-petabyte storage solutions. Our facilities boast GPU and CPU compute clusters that surpass those of many national laboratories, and we are developing our own on-premises data centers globally. Our teams are dedicated to optimizing computing, networking, storage, and power usage for unparalleled performance. Our people and our computational resources are our greatest assets, and we are committed to investing in both.As a full-time Systems Engineer, you will play a pivotal role in projects that ensure our live trading and research operations run seamlessly around the clock, globally. Your responsibilities will vary from maintaining our high-performance computing (HPC) environment to designing and implementing services that enhance our research capabilities. Duties will include hardware and software installation, configuration, remote administration, monitoring, testing new technologies, developing automation tools, and performance tuning.

TAKE YOUR CAREER IN A NEW DIRECTIONAt Eurostar, we are at the forefront of transforming rail travel across five countries, creating new opportunities for travelers. Our trains do more than connect people; they contribute to a greener and more inclusive future for everyone. Join our passionate team and help us go the extra mile!We are excited to announce an opening for a Maintenance Configuration Controller within our Rolling Stock team. In this pivotal role, you will monitor the traceability of maintenance activities across our three depots, with a keen eye on safety-critical components such as running gear. You will also manage the archiving and data storage of all production records, component documents, and counters, while supporting the definition of international maintenance planning across the depots.This is a permanent position based at our Temple Mills depot in Leyton. Please note that the application deadline for this role is 5 PM on Friday, April 24, 2026.

Hudson River Trading is hiring a Junior Trading Systems Engineer to join its Trading Systems Infrastructure team. This group is responsible for designing, building, and maintaining the high-performance infrastructure that supports the firm's global trading operations. The focus is on ensuring reliability and efficiency for ultra low-latency operating systems, automation tools, and platforms that keep trading strategies running around the clock. Key responsibilities Contribute to projects within a real-time trading environment Address challenges that demand high availability, high throughput, and ultra low-latency solutions Support the maintenance and improvement of core infrastructure for global trading systems Assist in developing and automating tools that back trading operations What we look for Strong interest in coding and automation Willingness to learn new skills and technologies to work with a complex technical stack Ability to solve technical problems in a demanding setting Locations Chicago, Illinois, United States London, United Kingdom New York, NY, United States

Join Canonical as a Linux Desktop Support Engineer and elevate your career in a dynamic environment. Based in our London office, you will provide exceptional technical support to both employees and customers, ensuring seamless operation of our systems. Your role encompasses troubleshooting, case management, and delivering AV support for office events. You will own your cases from diagnosis through resolution, collaborating with colleagues and senior engineers when necessary. Come be part of a pioneering company in open-source software, where your passion for Linux and customer success can flourish.

Join Arondite as a Deployed Systems Engineer, where you will play a pivotal role in the deployment and management of advanced systems solutions. This position offers an exciting opportunity for technical professionals to showcase their expertise in a dynamic environment.

Are you ready to embrace a new challenge as a System Engineer? Join us in taking charge of the design, maintenance, and optimization of cutting-edge IT systems and infrastructure. If you have a passion for ensuring reliability, security, and scalability across the environments that power Aidence's global operations, we want to hear from you! Your drive for continuous improvement, coupled with your ability to streamline processes and collaborate with cross-functional teams, will be vital in delivering efficient, compliant, and high-performing systems.

Join the Vanguard of InnovationAt Palantir, we are at the forefront of developing advanced software for data-driven decision-making and operational excellence. Our platforms empower organizations to harness data for transformative outcomes—be it in developing lifesaving pharmaceuticals, anticipating supply chain disruptions, or locating missing persons.Your ContributionAs a Systems Engineer within Palantir’s Technical Operations team, you will play a pivotal role in optimizing our core business processes and workflows. Your responsibilities will encompass designing, constructing, and sustaining the infrastructure that underpins our vital business functions, including financial reporting, sales operations, and personnel management. Collaborating with both internal teams and external partners, you will adapt industry tools to meet the dynamic needs of Palantir, while enhancing our utilization of Palantir Foundry and AIP for internal projects.In this capacity, you will provide strategic technical guidance to key stakeholders. A typical day may involve assessing new technological solutions, aligning tech initiatives with business objectives, resolving high-priority system challenges, and engaging in cross-functional collaboration to drive system enhancements. Success in this role requires adeptness in managing multiple business systems while demonstrating flexibility and adaptability to evolving requirements and challenges.

The Systems Development team at Wehrtyou is integral to our mission, building and maintaining a robust platform that supports all Systems teams. As a Senior Software Engineer specializing in Security, you will leverage your expertise in Python and Go to create innovative solutions to complex security challenges. Your role will involve enhancing and integrating our existing tools and libraries across the platform, as well as designing and developing new tools to streamline trading, research, installation, and monitoring processes, ensuring they are secure and reliable.This position presents a unique opportunity to significantly influence a critical aspect of our expanding infrastructure. A typical day may include:Developing and maintaining automated tools and software features for secure machine provisioning, monitoring, metrics collection, maintenance, secrets management, and network configuration.Diagnosing and resolving software bugs across a fleet of Linux machines, tackling issues at the application, network, operating system, and kernel levels.Crafting configuration management scripts to build, deploy, and sustain new services.Contributing to setting the strategic direction for the Systems Python platform.Collaborating with HRT’s engineering teams to devise solutions to various security challenges.

G MASS is proud to partner with a leading global brokerage firm as they embark on a significant transformation of their front-to-back trading platform. We are seeking a skilled and seasoned Calypso Configuration Consultant to join our dynamic team for the wholesale implementation of Calypso. This role is pivotal in configuring, building, and validating the platform across diverse asset classes.As part of a large-scale delivery program, you will collaborate closely with internal technology teams, business operations, and the platform vendor to ensure optimal configuration of the system to support OTC derivatives and cross-asset trading workflows.The ideal candidate is a hands-on expert with a deep understanding of Calypso's functional architecture and the operational processes surrounding the trade lifecycle.

Join Alten as a Senior Systems Engineer and be part of a leading technology consultancy that specializes in engineering and IT services. In this critical role, you will drive innovative solutions and enhance system performance across various projects.