Skilled Linux Systems Administrator - Experienced/Lateral

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.

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!

Join Us in Advancing European Hypersonic Technology At Hypersonica, we are at the forefront of revolutionizing defense technology in Europe. Our mission is to provide unparalleled speed, resilience, and technological independence, setting new benchmarks in the industry. As part of our elite, compact team, you'll tackle significant challenges and deliver solutions rapidly. In the role of IT Systems Administrator, you will not find yourself in a conventional position. Instead, you'll enter a talent-rich atmosphere where every team member has the opportunity to influence the company's trajectory. We believe in recruiting a select group of extraordinary individuals with extensive technical expertise, sound judgment, and the ability to work independently. We prioritize talent over rigid job descriptions. While this position addresses a critical business requirement, its evolution will be determined by your unique skills and contributions. If you have the knack for achieving what others deem impossible or possess a distinctive skill set that defies traditional roles, we want to connect with you. Your efforts here will play a direct role in fostering Europe’s technological self-sufficiency.

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.

About the Position Join us as we expand our dynamic team of Linux Engineers at Jane Street. We are in search of a dedicated leader who is passionate about technology and team development. Our team comprises diligent Systems Engineers, Administrators, and Programmers, all focused on maintaining and enhancing the platform that underpins Jane Street's production trading systems. (Learn more about the Linux Engineer role here). As a manager, you will lead by example. We expect you to support your team while also embracing the role of an individual contributor. Your journey will begin with a thorough understanding of Jane Street's technical landscape, allowing you to progressively transition into a management position. We value candidates who embody our principles: integrity, collaboration, intellectual curiosity, humility, and a data-driven approach to decision-making and problem-solving. Successful candidates will be Linux Engineers at their core, with experience in people management, project oversight, large-scale coordination, partnership development, strategic planning, and service delivery. About You The ideal candidate for the Linux Engineering Manager position will possess a robust technical background alongside substantial leadership experience. You should excel in leading through direct involvement, balancing individual technical tasks with leadership duties. A willingness to learn OCaml, our preferred programming language, is essential. The requirements are as follows: Bachelor's degree in Computer Science, Software Engineering, or a related technical field (or equivalent experience) Exceptional communication skills, capable of conveying ideas clearly in both small and large group settings, along with the ability to analyze and solve complex problems A proven history of supporting individuals and fostering team success Experience in cultivating and expanding partnerships across the organization Strong analytical and troubleshooting skills across various domains (technical, process, interpersonal) In-depth knowledge of operating system fundamentals, particularly Linux Proficiency with the Unix command line and shell scripting Hands-on experience with modern Linux systems and systems programming concepts Basic understanding of network protocols Programming experience in any language Fluency in English is required If you're a recruiting agency interested in partnering with us, please...

About the Role monks is looking for a Finance Systems Administrator in London. This role focuses on keeping financial software running smoothly and supporting colleagues who rely on these systems every day. What You Will Do Manage and maintain financial software applications Support users with system issues and questions Identify and implement improvements to financial systems Help ensure financial reporting is efficient and accurate Location This position is based in London.

Why Join the Technology Team at loveholidays?At loveholidays, we are united in our quest to revolutionize travel. Our goal is to provide customers with unmatched choices, effortless planning, and exceptional value for their next holiday. Our passionate team acts as personal holiday advisors, ensuring every getaway is seamless and enjoyable.Our technology framework is at the heart of our ambition to lead the global packaged holiday market. We are committed to driving innovation and ensuring technical excellence to safeguard our future. Our systems handle a vast number of holiday offers daily, deploying over a thousand times each month and managing thousands of requests every second. Here, you will have the opportunity to accelerate your professional development by tackling complex challenges and expanding your expertise.Join us as we shape the future and take ownership of your success while working towards shared objectives. We actively engage in discussions about technology and adhere to our core technology principles that have guided our growth. With ambitious plans for expansion across Europe, we are on the lookout for the brightest minds and the latest technologies to help us succeed.About Our Team:Our dedicated technical team currently consists of five members, including the Senior Business IT Manager, two Senior System Administrators, and a System Administrator. As the third Senior System Administrator, you will play a pivotal role in providing support to our 400 staff at our Hammersmith headquarters, while also offering assistance to our Dusseldorf office and our two outsourced call centers in India and South Africa.Your Impact:In the role of Senior System Administrator, reporting to the Senior Business IT Manager, you will oversee the strategic and operational support essential for the seamless functioning of our IT systems across all regions. You will serve as a critical escalation point for both internal teams and external partners.Your Daily Responsibilities:Administer and support a large, multi-platform environment including Google Workspace and more.

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.

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.

Anduril Industries is hiring an Engineering Systems Administrator in London. This position focuses on optimizing the engineering systems that product and program teams rely on, including PLM, CAD, CAE, and related tools. The role works closely with stakeholders to design and implement system improvements and guide technology decisions. Role overview This position centers on supporting and enhancing the systems used by engineering, supply chain, manufacturing, and other departments. The Engineering Systems Administrator will collaborate with the EngOS team and other stakeholders to improve workflows and ensure teams have the right tools to succeed. What you will do Gather requirements from engineering teams and translate them into functional and technical solutions in partnership with the EngOS team. Provide training and ongoing support to users during and after system implementations to promote adoption. Lead new feature rollouts by defining project scope, requirements, timelines, and budgets. Work with developers to troubleshoot and resolve issues, bugs, and enhancement requests for PLM and its integrations, such as CAD. Support installation and post-launch activities for upgrades and new modules in the PLM system. Coordinate with vendors and third-party providers to implement upgrades and new modules. Address infrastructure and configuration questions related to PLM and its integrations. Collaborate with a global PLM team to align systems and improve processes across regions. Team context The Business Systems team at Anduril supports strategic goals by improving operations systems across departments. This group ensures that teams in supply chain, accounting, sales, engineering, modeling, simulation, field maintenance, and manufacturing have the tools they need for success.

Role Overview Talos Trading is hiring a TechOps Engineer - System Administrator in London. This position plays a key part in supporting and improving the technology that powers our trading operations. The work focuses on maintaining and optimizing systems so trading platforms run smoothly and efficiently.

Role Overview HTB Group is looking for an IT Support Systems Administrator in London. This role focuses on keeping IT systems and infrastructure running smoothly. The position involves troubleshooting technical issues, supporting staff, and working to maintain strong system performance. What You Will Do Resolve technical problems as they arise Provide IT support to employees across the company Monitor and maintain system performance Work with other teams to implement solutions that strengthen IT operations Location Based in London, England, United Kingdom.

About Air Apps Air Apps builds AI-powered tools for personal and entrepreneurial planning. Founded in Lisbon in 2018, the company now operates from offices in Lisbon and San Francisco. Air Apps has reached over 100 million downloads worldwide and remains self-funded. The team focuses on long-term goals, developing technology that makes a real difference in daily life. Role Overview: Systems Administrator The Systems Administrator manages and maintains Air Apps' corporate IT infrastructure. This includes device management, network security, access control, and IT support for employees. The goal: keep systems secure, efficient, and reliable so teams can work without interruption. The role also involves optimizing SaaS tools and ensuring users have seamless access to what they need. Key Responsibilities Oversee device management and user access Maintain network security and enforce security best practices Administer SaaS tools used across the organization Provide IT support to employees Collaborate with cross-functional teams to improve internal operations Location and Work Arrangement This is a fully onsite role based in the London Metropolitan Area office Air Apps is open to supporting relocation for the right candidate

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.

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.

Join one of the largest retail companies in the UK as a Database Administrator. This role is critical in managing and optimizing our databases to support business operations and enhance data accessibility. As part of our dynamic team, you will play a pivotal role in ensuring data integrity and security, along with implementing best practices in database management.

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.

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 our dynamic team at The Rank Group as an Experienced Dealer, where you will play a pivotal role in providing exceptional gaming experiences. You will be responsible for managing games, ensuring fair play, and delivering outstanding customer service within a vibrant casino environment. If you have a passion for gaming and a commitment to excellence, we want to hear from you!