Linux Engineer at Jane Street | New York

Join Trexquant as a dedicated Linux Systems Engineer, where you will play a pivotal role in constructing, managing, and scaling our on-premise infrastructure. This hands-on position emphasizes bare-metal Linux systems and offers significant ownership of server provisioning, storage management, and overall system reliability.The ideal candidate will be meticulous, highly disciplined, and adept at thriving in a challenging, production-critical environment. This role is specifically tailored for individuals with extensive experience in physical infrastructure, Linux internals, and automation within a high-performance context.Key Responsibilities:Construct, provision, and manage bare-metal Linux servers, overseeing OS installation, configuration, and lifecycle management.Take full ownership of server infrastructure from hardware through to the operating system and core services, ensuring optimal stability and performance.Configure and manage storage systems, including ZFS and enterprise storage platforms (e.g., NetApp, Dell, or similar).Monitor system health and performance, troubleshoot issues, and implement sustainable long-term solutions.Develop and maintain automation scripts using Ansible and Bash to standardize provisioning, configuration, and operational procedures.Conduct system patching, upgrades, and capacity planning across an expanding server fleet.Engage in incident response and root cause analysis, focusing on the continuous improvement of system reliability.Collaborate with engineering and infrastructure teams to optimize application performance on Linux systems.Contribute to documentation, runbooks, and operational best practices.Support data center operations as required, including hardware troubleshooting, racking, cabling, and server replacements.Occasionally travel to data centers for maintenance, expansions, and problem resolution.

Role overview Trexquant is looking for a Linux Systems Engineer to support and enhance its on-premise infrastructure in New York. The position involves direct, hands-on work with bare-metal Linux servers. Daily tasks include provisioning new hardware, managing storage resources, and working to keep systems reliable and efficient in a production environment. What you will do Set up and maintain physical Linux servers Oversee storage systems and uphold data integrity Monitor system health and implement improvements to reliability in production environments Who thrives in this role Approaches system administration with care and discipline Feels comfortable in production-critical situations Brings a strong grasp of Linux internals, automation tools, and high-performance system setups Location This role is based in New York, New York, United States, with a focus on managing on-premise, physical infrastructure.

Trexquant is a systematic fund focused on quantitative finance, with a team of researchers and engineers dedicated to advancing trading operations. The company is investing in its quantitative research and trading platform, aiming to shape the future of systematic trading. This early career Software Engineer role is based in New York and offers the chance to work alongside experienced engineers and quantitative researchers. The position centers on building and improving the infrastructure that supports systematic trading, including data pipelines, backtesting tools, and execution systems. Many projects involve greenfield development, offering opportunities to help design and implement new systems from the ground up. What you will do Develop low-latency, high-throughput research and trading systems using languages such as C++, C, Java, or Rust. Design and optimize data processing pipelines to ensure reliable access to large, high-quality datasets. Help create tools for backtesting, model training, and strategy evaluation. Work with researchers and traders to deliver technical solutions that support research and trading performance. Participate in code reviews, testing, and documentation to maintain high standards. Stay current with new technologies and best practices, contributing ideas to improve systems. Requirements Bachelor's or Master's degree in Computer Science or a related STEM field. Strong grasp of data structures, algorithms, and object-oriented programming. Proficiency in at least one programming language: C++, C, Python, Java, or Rust. Familiarity with Linux environments. Strong problem-solving skills and the ability to learn quickly in a team setting. Benefits Competitive salary with performance-based bonuses. Supportive and friendly workplace culture. Full coverage of PPO health, dental, and vision insurance premiums for employees and dependents. Pre-tax commuter benefits. Weekly company meals. Compensation The base salary range for this role is $130,000 to $175,000, depending on educational and professional background. Compensation may also include a discretionary, performance-based bonus. This position is overtime-exempt. Applications are open for both Stamford and New York City offices. The New York office is expected to open in October 2026. Trexquant is an Equal Opportunity Employer.

Trexquant is hiring a Senior Data Architect to lead the creation of a new data platform for quantitative research and simulation. This role centers on building a scalable system that unifies data from hundreds of vendors, ensuring reliable and accessible information for research and alpha generation across multiple asset classes. Key Responsibilities Design and implement a data platform that consolidates vendor datasets, offering consistent, high-quality access for research and simulation teams. Develop storage and retrieval solutions to support large-scale historical backtesting and high-frequency research. Create user-friendly interfaces and APIs, enabling researchers to discover variables, review metadata, and assemble standardized datasets for rapid idea testing. Work closely with quantitative researchers and simulation teams to understand their requirements and ensure the platform meets analytical and performance needs. Set standards for data modeling, normalization, version control, and quality assurance across diverse asset classes and sources. Partner with infrastructure and DevOps teams to enhance data pipelines, caching, and distributed storage for improved scalability and reliability. Prototype and launch internal tools that improve research efficiency and data transparency. Mentor data engineers, supporting well-documented and maintainable data systems. Platform Scope The platform will handle data for a broad range of financial instruments, including equities, futures, FX, ETFs, corporate bonds, and options. The focus is on transforming raw vendor feeds into structured, analysis-ready datasets that enable systematic research and backtesting. Location This position is based in New York, New York, United States.

Trexquant is on the lookout for an exceptional Senior Data Architect to spearhead the design and implementation of a cutting-edge architecture for our research and simulation data ecosystem. This pivotal role will unify Trexquant’s vast array of datasets—sourced from numerous vendors—into a streamlined, efficient, and scalable data platform that caters to simulation, research, and alpha generation across diverse asset classes.The ideal candidate will construct the comprehensive data infrastructure that empowers researchers and simulators to effortlessly discover, query, and integrate datasets spanning equities, futures, FX, ETFs, corporate bonds, and options. This role entails designing effective data models, storage solutions, and user-friendly interfaces that facilitate the transformation of raw vendor data into structured, analysis-ready formats, thereby enhancing systematic research and robust backtesting.ResponsibilitiesDesign and execute a unified data platform that consolidates hundreds of vendor datasets, ensuring consistent, accessible, high-quality data for simulators and researchers.Create efficient storage and retrieval systems to enable large-scale historical backtesting and high-frequency research workflows.Develop user-friendly interfaces and APIs that facilitate easy variable discovery, metadata exploration, and data assembly into standardized stocks × values matrices for rapid hypothesis testing.Work collaboratively with quantitative researchers and simulation teams to grasp their workflows, ensuring the data platform meets analytical and performance needs in real-world scenarios.Establish best practices for data modeling, normalization, versioning, and quality control across various asset classes and data vendors.Collaborate with infrastructure and DevOps teams to enhance data pipelines, caching mechanisms, and distributed storage for improved scalability and reliability.Prototype and deploy internal data applications aimed at bolstering research productivity and data transparency.Guide and mentor data engineers to uphold robust, maintainable, and well-documented data systems.

At Trexquant, we are a pioneering systematic fund leading the way in quantitative finance, powered by a team of exceptional researchers and engineers. As we broaden our trading operations, we are committed to developing the next generation of our quantitative research and trading platform.We are looking for an enthusiastic Early Career Software Engineer with robust programming capabilities to join our dynamic engineering team. In this pivotal role, you will collaborate closely with seasoned engineers and quantitative researchers to design and enhance the infrastructure that drives our systematic trading, including data pipelines, backtesting tools, and execution systems. You will have the chance to engage in greenfield development projects, helping to construct new systems from the ground up and fostering innovation and scalability within our technology stack.

Trexquant seeks a Lead Trading Systems Engineer in New York to strengthen the core platforms behind the firm's trading and research activities. This position focuses on building, refining, and scaling the systems that underpin strategy development, simulation, and execution. Collaboration with quantitative researchers and engineers is central to expanding simulation and execution capabilities. Main responsibilities Design and enhance infrastructure supporting trading, research, and operations, integrating closely with the Order Management System (OMS). Develop a high-performance simulation and backtesting platform for equities, futures, fixed income, and derivatives, supporting research and strategy deployment. Analyze and improve existing systems, addressing performance bottlenecks and strengthening scalability, security, and reliability. Partner with quantitative researchers and cross-functional teams to align technical direction with infrastructure goals, including accurate modeling of market conditions and execution behaviors. Build and optimize data and compute infrastructure for low-latency, high-throughput processing of large-scale market data for both simulation and live trading. Advance caching, time-series data management, and distributed computation to ensure modular, scalable simulation and backtesting frameworks. Lead development, integration, and deployment of systems and tools using C++ and Python in Linux environments. Mentor engineers and researchers, offering technical guidance and keeping up with new technologies and industry standards. Location This position is based in New York, New York, United States.

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)

Trexquant is a premier systematic hedge fund that employs cutting-edge machine learning and quantitative strategies to maintain a market-neutral portfolio. With a global presence spanning the U.S., China, and India, our innovative team of researchers, technologists, and finance experts is dedicated to advancing the field of quantitative finance.We are on the lookout for a motivated and detail-oriented Business Development and Strategy Associate to enhance our growing statistical arbitrage hedge fund. In this role, you will collaborate closely with the Chief Strategy Officer to identify new business opportunities, implement initiatives for process and product improvements, and drive the firm's growth through data-centric decisions. The ideal candidate will demonstrate robust analytical and project management abilities, along with an entrepreneurial mindset to expand our market presence and reinforce our competitive advantage.

Join the City of New York as a Lead Unix/Linux Systems Engineer, where you will play a pivotal role in managing and optimizing our Unix/Linux environments. You will collaborate with cross-functional teams to implement robust solutions that enhance system performance and security. Be part of a dynamic organization that values innovation and excellence.

About the PositionWe are in search of a dynamic leader to guide our expanding team of Linux Engineers at Jane Street.This team, comprising both managers and individual contributors, consists of dedicated Systems Engineers, Administrators, and Programmers who are responsible for maintaining and enhancing the platform that drives Jane Street's production trading systems. (Learn more about the Linux Engineer role here.)We expect our managers to lead by example. While supporting their teams, the ideal candidate will be eager to begin as an individual contributor, develop a solid grasp of Jane Street's technical landscape, and evolve into a managerial role.We value individuals who resonate with our core principles: honesty, collaboration, intellectual curiosity, humility, and a quantitative approach to decision-making and problem-solving. To excel in this role, candidates should be Linux Engineers at heart, with experience in various areas including people management, project and program management, large-scale coordination, partnership facilitation, strategic planning, and service delivery.About YouWe are looking for a Linux Engineering Manager who possesses a robust technical background and substantial leadership experience. Candidates should lead by example, balancing their individual technical contributions with their leadership responsibilities. A willingness to learn OCaml, our programming language of choice, is essential. Candidates should meet the following qualifications:Bachelor's degree in Computer Science, Software Engineering, or a related technical field (or equivalent experience)Exceptional communication skills, capable of engaging in one-on-one meetings as well as larger group discussions, with the ability to analyze and deconstruct complex problems efficientlyA proven track record of supporting individuals and fostering team growthExperience in building and nurturing cross-company partnershipsStrong analytical and troubleshooting abilities across various dimensions (technical, process, interpersonal, etc.)In-depth understanding of operating system fundamentals, particularly LinuxProficiency with the Unix command line and shell scriptingHands-on experience with modern Linux systems and systems programming conceptsBasic understanding of network protocolsProgramming experience in any language

Trexquant Investment LP is on the lookout for a talented and experienced Software Engineer with advanced proficiency in C++ and practical experience within high-frequency trading environments. In this pivotal role, you will be responsible for designing, implementing, and optimizing high-performance short-term trading signals that directly enhance trading performance. You’ll work closely with innovative researchers and technologists while also demonstrating the ability to operate independently in building systems that yield measurable results.Key ResponsibilitiesCreate, construct, and optimize high-performance short-term trading signals.Enhance and support independent trading workflows to ensure robust, scalable, and low-latency performance.Write clean, maintainable, and thoroughly tested C++ code for real-time trading systems.Profile and enhance system performance across software and Linux environments.Collaborate with researchers and technologists to transform ideas into production-ready implementations while effectively working with minimal supervision.QualificationsExpert-level proficiency in C++ and Linux, with a strong background in developing high-performance, latency-sensitive systems.A minimum of 2 years of quantitative development experience in high-frequency trading or similar real-time environments.Bachelor’s, Master’s, or PhD in Computer Science or a related STEM field.Strong analytical and problem-solving abilities.Demonstrated capability to work collaboratively and independently with minimal supervision.

About Five RingsFive Rings is an innovative proprietary trading firm that merges strategy, technology, and creativity to excel in the global markets. With a presence in major cities such as New York, Boca Raton, London, and Amsterdam, Five Rings engages in diverse domestic and international trading activities. Our team is dedicated to discovering new opportunities, assessing their risks and rewards, and developing strategies and tools to leverage them.We foster an open culture that promotes the exchange of knowledge and ideas across all levels of the organization.About the RoleWe are looking for a skilled Linux Systems Administrator to join our expanding systems administration team. In this hands-on role, you will be responsible for managing the workstations and servers that support our trading operations. This includes performing systems work on both desktops and in our data centers, while collaborating with users throughout the organization.As a Linux-focused environment, our operations primarily utilize Linux servers and desktops, with minimal use of Windows servers and desktops as required.

Join Point72 as a Linux Security Lead, where you will spearhead our efforts to enhance the security posture of our Linux systems. In this pivotal role, you will collaborate with cross-functional teams to implement robust security measures, conduct risk assessments, and ensure compliance with industry standards. Your expertise will help safeguard our infrastructure and data integrity.

Join Trexquant as an AI Research Engineer, where you will be at the forefront of creating AI-powered systems that enhance alpha discovery for a forward-thinking quantitative hedge fund. In this pivotal role, you'll utilize state-of-the-art AI coding tools, such as Claude Code and other LLM-based agents, to develop automated research workflows that yield innovative data variables, predictive signals, and systematic trading strategies.Your work will bridge quantitative research, machine learning, and AI-enhanced development, resulting in scalable systems that significantly boost research efficiency and the quality of investment ideas.Key ResponsibilitiesDevelop AI-assisted research pipelines for data ingestion, feature engineering, alpha generation, and backtesting.Create autonomous workflows that explore datasets and propose potential signals.Quickly prototype and assess systematic strategies using comprehensive validation frameworks.Enhance research productivity by integrating AI coding agents into the quantitative workflow.Collaborate with researchers and Portfolio Managers (PMs) to transition validated alpha signals into production-ready applications.QualificationsProficiency in Python programming with experience in building research infrastructure.Strong foundation in statistics, machine learning, and backtesting methodologies.Practical experience utilizing AI coding tools (e.g., Claude Code, GPT-based agents) within a development workflow.Background in quantitative research, systematic trading, or alpha signal development is preferred.BenefitsCompetitive salary with performance-based bonuses.Friendly and collaborative work environment.Comprehensive PPO health, dental, and vision insurance fully covered for you and your dependents.Pre-tax commuter benefits.Weekly company meals.Applications are welcomed for both Stamford and New York City offices, with the NYC location set to open in October 2026.The base salary for this position ranges from $175,000 to $200,000, determined by the candidate’s educational background and experience. This role is classified as overtime-exempt.Trexquant is proud to be an Equal Opportunity Employer.

About Yext Yext (NYSE: YEXT) helps brands manage their visibility and engagement across search engines, social media, websites, direct communications, and more. With over 2 billion trusted data points and a suite of integrated products, Yext gives organizations the tools to control their digital presence and gain actionable insights. The company has earned recognition as a 'Best Place to Work' from Built In, Fortune, and Great Place To Work®. Role Overview: Systems Engineer The Systems & Networking team designs and maintains the infrastructure that supports the entire Yext platform. This group focuses on building infrastructure that is reliable, predictable, and secure, spanning both co-location facilities and cloud environments. What You Will Do Develop and maintain infrastructure using a mix of open-source and commercial technologies. Support Yext teams by providing a stable and secure platform for development, support, and maintenance. Advise teams on best practices for using and integrating with infrastructure resources. Location This role is based in New York, NY.

About BlacksmithAt Blacksmith, we revolutionize CI workload infrastructure, delivering unparalleled speed and cost-effectiveness through our proprietary fleet of global bare-metal machines, which eliminates the need for generic cloud VMs.We successfully orchestrate tens of millions of Firecracker VMs monthly, supporting over 1,200 companies while achieving approximately $10 million in annual recurring revenue in under two years.Our operations span thousands of bare-metal machines across various regions, managing a petabyte-scale Ceph cluster and consistently scheduling over 30,000 vCPUs concurrently.Backed by $13.5 million in funding from notable investors such as Google Ventures (GV), we are focused on cultivating a small yet exceptional team.Founded by experts with extensive experience in systems and scaling, including roles at Faire and Cockroach Labs, we are expanding our CI infrastructure into a comprehensive platform that includes running agent sandboxes at scale and developing our own background coding agent.

Join Aircall, a cutting-edge unicorn and AI-powered customer communications platform, serving over 22,000 businesses globally. Our mission is to transform customer communications by seamlessly integrating voice, SMS, WhatsApp, and AI into one cohesive workspace.At Aircall, we believe in empowering teams to work smarter, not harder. Our innovative solutions, including the AI Voice Agent for automating routine calls and AI Assist for optimizing post-call tasks, are designed to boost revenue, accelerate problem resolution, and enable teams to scale efficiently.Headquartered in Paris, with a significant presence across North America, including Seattle and New York City, we are rapidly expanding with teams in Madrid, London, Berlin, San Francisco, Sydney, and Mexico City. Our product is loved by customers, and we are backed by prestigious investors, continually driving AI innovation across our offerings.At Aircall, you will become part of a dynamic, ambitious, and execution-focused team. We prioritize quick decision-making, visible impact, and genuine growth.Our Work Culture: We are dedicated to understanding our customers, driven by data, and focused on delivering significant outcomes. We value ownership, continuous learning, and thoughtful speed. If you thrive in a collaborative and fast-paced environment where trust and impact are paramount, you will find your place here.We are searching for a highly skilled Principal Business Systems Engineer to spearhead strategic initiatives within our Go-to-Market (GTM) Engineering team, driving transformative business solutions. This pivotal role involves collaborating cross-functionally with key stakeholders in Sales, Marketing, Customer Success, and Revenue Operations to design and implement scalable systems that enhance operational efficiency and foster revenue growth.As a Principal Business Systems Engineer, you will provide strategic insights, influence business strategies, and leverage your expertise in business process automation, system integrations, and data analytics to address complex challenges. This is a unique opportunity to shape the future of our GTM technology landscape utilizing your extensive knowledge of CRM and analytics tools.

Trexquant is a dynamic systematic hedge fund leveraging advanced statistical algorithms to trade equities, futures, and various global markets. Our approach begins with extensive datasets, from which we create comprehensive feature sets and employ diverse machine learning techniques to identify trading signals, culminating in the formulation of market-neutral portfolios. We are on the lookout for innovative data scientists, physicists, engineers, economists, and programmers eager to contribute to the development of cutting-edge machine learning strategies that predict the movements of liquid financial assets with precision.The role of a Quantitative Researcher at Trexquant offers opportunities across several specialized teams:Alpha Researcher:Join the Alpha Researcher team to design and implement market-neutral signals, analyze large datasets, and collaborate with the Data and Strategy Research teams to create a diverse array of predictive models.Data Scientist:As part of the Data Science team, you will work on data parsing and analysis, sourcing new datasets, and teaming up with the Alpha and Strategy teams to build predictive machine learning models.Strategy Researcher:In the Strategy team, you will engage in the development of systematic strategies utilizing various machine learning and statistical methodologies, training and validating data derived from actual market trading.Upon applying for the Quantitative Researcher position at Trexquant, you will first be evaluated on the fundamental skills necessary for the role. Our interview process is designed to help us understand your strengths better and match you with a research team that aligns with your skills and preferences.Your Responsibilities:Design and optimize machine learning models aimed at predicting liquid asset movements using extensive financial datasets and a rich library of trading signals.Analyze data sets for future alpha development.Explore and implement cutting-edge academic research in quantitative finance.Collaborate with skilled quantitative researchers to conduct experiments and validate hypotheses through simulations.Requirements:BS/MS/PhD in a STEM field.Enthusiasm for machine learning.Proficiency in programming languages such as Python.Exceptional problem-solving abilities.Ability to function effectively both independently and as part of a team.Knowledge of financial accounting is advantageous.A background in quantitative finance is beneficial but not a prerequisite.Benefits:Competitive salary plus bonuses based on individual and company performance.