C# / .NET Developer for Front Office Electronic Trading Systems

Front Office IT Support Engineer – Trading & Electronic Trading SystemsJoin MARGO in the UK (London)MARGO is a technology-driven consultancy that provides high-value IT expertise to the financial services sector.We thrive in complex Front Office environments where technology, trading activity, and operational constraints converge. Our team supports and manages mission-critical trading systems utilized by Front Office, trading, and risk teams, ensuring responsiveness, reliability, and a deep technical understanding.Being part of MARGO means engaging in challenging Front Office environments while enjoying a close-knit structure, personalized support, and customized training pathways.Business ContextIn this role, you will be integral to Front Office IT Support and Trading Technology, providing support for live trading operations across various asset classes.Our systems are production-critical, operate in real-time, and demand a strong emphasis on stability, performance, and incident management. You will collaborate closely with traders, sales, risk, development, and infrastructure teams.Role OverviewWe are seeking a Front Office IT Support Engineer to oversee, enhance, and maintain trading and electronic trading systems.This position extends beyond mere reactive support; it requires proactive ownership of Front Office platforms, involvement in change initiatives, and hands-on troubleshooting of production issues in real-time settings.Ideal candidates will have a strong passion for trading systems, production environments, and a desire for progressive technical challenges.Key ResponsibilitiesProduction Support & Operations· Deliver Front Office IT support in live trading environments.· Ensure the availability, stability, and performance of trading systems during market hours.· Collaborate with various teams to identify and resolve issues efficiently.

Join Hudson River Trading (HRT) as a Junior Crypto Electronic Trading Support Engineer in our London office. As part of our dynamic Trade Operations (TradeOps) team, you will manage one of the world's leading electronic trading platforms, focusing on crypto trading. Your role will involve configuring, monitoring, and optimizing trading processes while addressing risk, compliance, and development tasks. You will engage in automating routine processes and prepare for unexpected challenges, which may include troubleshooting issues to ensure a smooth market open, making critical decisions balancing compliance, risk, and PnL during trading hours, and coordinating the launch of new trading strategies. We seek a tech-savvy individual with a passion for crypto, ready to tackle a variety of projects using the best tools available. Exceptional communication skills and a proactive attitude are essential in this fast-paced environment.

Java Developer for Front Office and Trading SystemsExciting Opportunities with MARGO in London – Both Permanent and Contract Roles Available! MARGO is a cutting-edge consultancy specializing in providing top-tier IT solutions tailored for the financial services industry. We excel in complex software engineering settings where performance, reliability, and scalability are of utmost importance: think low-latency systems, real-time data processing, distributed architectures, and handling high-volume data flows.Joining MARGO means immersing yourself in challenging Front Office and Risk IT environments, while enjoying a supportive structure, personalized training paths, and close guidance.Business ContextYou will be part of the Front Office / Trading IT team at one of our prestigious tier-1 investment banking clients.Your role will involve designing and maintaining mission-critical Java applications that facilitate electronic trading across various asset classes (including Equities, Fixed Income, Commodities, FX, and Derivatives).The work environment is characterized by:· Real-time and event-driven architecture· High performance and low-latency demands· Close collaboration with trading, quantitative, and risk teams· Rapid delivery cycles with exceptional engineering standardsRole OverviewWe are seeking a skilled Java Developer to contribute to real-time trading and risk management systems.

Production Engineer - Electronic Trading SystemsJoin MARGO in London, UKMARGO Group is a cutting-edge consultancy that provides high-value IT expertise to the financial services sector. We specialize in complex Front Office environments where trading activities depend on robust, high-performing, and resilient production systems. Our experts bridge the gap between trading, development, and infrastructure teams to ensure critical platforms operate reliably under the pressures of real-time market conditions.Becoming a part of MARGO means thriving in challenging production environments, benefiting from a close-knit structure, personalized support, and tailored training programs.Business ContextIn this role, you will engage with Front Office Production and Trading Technology environments, actively supporting live trading and electronic trading platforms. These critical production environments operate in real-time and necessitate strong ownership of system stability, performance, and incident management. You will interact closely with traders, developers, IT support, and infrastructure teams.Role OverviewWe are seeking a dedicated Front Office Production Engineer to manage, stabilize, and enhance our trading and electronic trading systems. This role is highly technical and focuses on production. It combines hands-on system operation with in-depth incident investigation, performance optimization, and automation, providing close support to Front Office users.This position is ideal for individuals who take pride in owning production systems, comprehending application behavior under load, and collaborating across teams to enhance reliability and performance.Key ResponsibilitiesProduction Ownership & Reliability· Operate and support Front Office trading systems in live production environments.· Ensure the highest levels of availability, stability, and performance during trading hours.

Network Engineer – Trading & Electronic Trading InfrastructureJoin MARGO in London – Permanent & Contracting OpportunitiesMARGO is a technology-driven consultancy providing exceptional IT expertise tailored for the complexities of financial markets.We specialize in mission-critical trading and electronic trading infrastructures, emphasizing performance, latency, resilience, and automation as key elements of success. Our consultants collaborate closely with trading, application, and infrastructure teams to design, transform, and operate high-performance platforms.By joining MARGO, you will engage in technically challenging transformation projects while benefiting from a supportive environment, personalized career development, and close guidance.Business ContextYou will be part of a trading and electronic trading infrastructure team undergoing a significant network transformation.Following years of organic growth, we are re-evaluating our network architecture with new investments focused on:Latency-sensitive electronic trading systemsScalability and resilienceAutomation and infrastructure-as-code principlesThis role is positioned at the intersection of network engineering, production operations, and application proximity, requiring direct interaction with trading and development teams.Role OverviewWe are seeking a Network Engineer to play a key role in the redesign, automation, and management of trading and corporate network infrastructures.The position combines architectural design, hands-on engineering, and production ownership, ideal for engineers eager to work closely with trading environments and lead significant technical transformation initiatives.Key ResponsibilitiesArchitecting, transforming, and managing network infrastructures while ensuring their operational excellence.

Join Us as a Software EngineerAt Talos, we are leading the way in institutional trading technology for the digital asset market, established in 2018. Our cutting-edge solutions empower major players in the crypto ecosystem, facilitating seamless trading and settlement processes.Our mission is to promote the widespread adoption of digital assets, creating a trusted and innovative platform that supports the entire trading lifecycle. We pride ourselves on fostering a workplace that values kindness, respect, and inclusivity, where diverse perspectives fuel our progress.As part of a close-knit yet decentralized team of skilled engineers and professionals, you will thrive in our hybrid-friendly environment, with hubs in New York, London, Singapore, Sweden, and Cyprus.As a Software Engineer at Talos, you will be instrumental in developing high-performance systems that bridge the gap between crypto and capital markets. Collaborating with our talented team, you will enhance our backend trading and settlement platform, focusing on areas such as order routing, market data connectivity, position management, and risk systems.We seek passionate engineers eager to take ownership of their work and contribute across the entire development lifecycle—design, implementation, testing, and deployment. If you enjoy tackling complex challenges in a fast-paced environment and are eager to learn from seasoned colleagues, we want to hear from you! Experience in finance or crypto is a plus, but your coding skills, critical thinking, and collaborative spirit are our top priorities.Interested in our engineering culture? Explore Sonic, our inaugural open-source project that enables microsecond network stack latency in Go: https://github.com/talostrading/sonic

Join Our Innovative Team in the Digital Asset MarketFounded in 2018, Talos is at the forefront of providing institutional-grade trading technology tailored for the global digital asset market, empowering many key players within the crypto ecosystem.At Talos, our mission is to foster the widespread adoption of digital assets by effectively connecting institutions to the evolving digital asset landscape. We are dedicated to developing the most innovative and trusted platform, supporting a comprehensive trading lifecycle.Our workplace embodies kindness, respect, and inclusivity, valuing diverse perspectives that contribute to our growth. We believe that each team member brings unique insights and skills that propel Talos towards excellence. In our commitment to collaboration and mutual success, we cultivate a culture of trust and integrity, working together to build something remarkable. Your contributions will be vital to our collective achievements.We are a close-knit yet decentralized team of experienced engineers and business professionals, operating in a hybrid-friendly environment with offices in New York, London, Singapore, Sweden, and Cyprus.About the RoleAs a Software Engineer in our Trading Connectivity team, you will be responsible for designing, developing, and maintaining high-performance backend systems that interface with our extensive provider network. Your role will involve collaborating with product managers, trading support, other engineering teams, and clients to facilitate the integration of new liquidity providers into the Talos network. You will be instrumental in enhancing the platform's scalability, reliability, security, and overall performance, managing the integration process from requirement gathering to deployment.To learn more about Talos's engineering culture, explore Sonic, our inaugural open-source project that enables us to achieve microsecond network stack latency in Go: https://github.com/talostrading/sonic

Join the Digital Asset RevolutionFounded in 2018, Talos is at the forefront of institutional-grade trading technology for the global digital asset market, enabling many prominent players within the crypto ecosystem. Our mission is to facilitate the widespread acceptance of digital assets by connecting institutions to this evolving landscape seamlessly. We are dedicated to creating the most innovative and reliable platform in the industry, supporting the entire trading lifecycle.At Talos, we promote a culture of kindness, respect, and inclusivity, valuing diverse perspectives that contribute to our collective success. Each team member brings unique insights and skills that propel Talos forward, fostering a collaborative environment built on trust, integrity, and mutual growth.As part of our globally distributed team of seasoned engineers and business professionals, you will find a hybrid-friendly workplace that encourages your unique talents and contributions to help us build something extraordinary.Client Services Engineer RoleWe are seeking a skilled Client Services Engineer to support our clients in a dynamic, round-the-clock global digital asset trading environment. This pivotal role will ensure ongoing client success and the overall integrity of our trading systems.

Job Title: Python Developer – Front Office R&D Trading SystemsLocation: London, UKEmployment Type: Permanent or ContractAbout MARGOMARGO is a cutting-edge consultancy providing invaluable IT expertise to the financial services sector. We excel in complex Front Office environments where software engineering, quantitative analysis, and production stability converge. Our specialists collaborate closely with trading and research teams to enhance real-time trading platforms, pricing models, and analytical systems.The RoleAs a key member of our Front Office R&D and Trading Technology team, you will be responsible for designing, maintaining, and evolving the ecosystem utilized by traders and quantitative analysts. This role involves 70% Development & Engineering and 30% Production Support, allowing you significant ownership over the platform.The environment is dynamic and characterized by rapid iterations, direct trader interaction, and stringent reliability standards. You will primarily work with Python to develop essential frameworks, analytical libraries, and monitoring tools.Key ResponsibilitiesDevelopment & Engineering (Approx. 70%)- Design, develop, and maintain core libraries and frameworks in Python.- Collaborate with traders and research teams to gather requirements for new analytical and trading tools.- Enhance the performance, scalability, and maintainability of the Python platform.- Upgrade existing monitoring, analysis, and control tools to support research workflows.Support & Production (Approx. 30%)- Provide L1/L2 support to Front Office users to ensure system stability during market hours.- Investigate and resolve production incidents promptly.- Develop tools to enhance system reliability and operational efficiency.- Contribute to the evolution of performance-sensitive, low-latency setups.RequirementsEssential Skills:Strong Python Proficiency: Deep expertise in core Python development and performance-oriented coding.Linux/UNIX: Robust knowledge of Linux environments for production and debugging.Database Skills: Proficiency with SQL and relational databases.Production Experience: Capacity to perform under pressure and strong troubleshooting and analytical abilities.Communication: Clear communication with a structured approach to problem-solving.Valued (but not mandatory):Experience in Front Office R&D or Electronic Trading environments.

About WintermuteWintermute is a pioneering technology company and a leading player in the algorithmic trading sector, focusing on digital assets. We are dedicated to providing liquidity across a vast array of cryptocurrency exchanges and trading platforms. Additionally, we offer comprehensive OTC trading solutions, supporting both high-profile blockchain initiatives and traditional financial institutions transitioning into the crypto space. Our Wintermute Ventures division also invests in promising early-stage DeFi projects.Founded in 2017, Wintermute has adeptly navigated the complexities of industry cycles. Our culture merges the high-frequency trading standards of traditional markets with the innovative and entrepreneurial spirit typical of technology startups. We are firm believers in the transformative potential of blockchain, and we take a long-term approach to the digital asset market, positioning ourselves as leaders in fostering a compliant and innovative trading environment. For more details, you can read more here.Why Join Wintermute?We are on the lookout for an Algorithmic Trader with robust coding abilities (Python) and a keen interest in high-frequency trading, liquidity provision, and cryptocurrency markets. From day one, you will manage your own “desk” and have the chance to create and refine your own trading algorithms and strategies. You will receive invaluable mentorship from seasoned traders and developers, including our founders and management team. Expect a high degree of autonomy and responsibility from the outset, allowing you to make a significant impact without the hindrance of legacy systems or bureaucratic red tape.Your ResponsibilitiesFollowing a brief training period, you will focus on enhancing existing trading strategies, introducing new trading products, and advancing the technology behind our trading systems. You will analyze extensive trading and transaction data to extract insights, prioritize them, and devise solutions based on your findings. You will have the opportunity to influence P&L positively and will be encouraged to experiment with innovative ideas and strategies. We will provide more technical specifics during the interview process.Please note: We seek individuals with strong quantitative and coding skills; however, this is primarily a business/trading role rather than a research position.

Join Our Team at WintermuteAs a leading technology unicorn and one of the foremost algorithmic trading firms in the digital assets space, Wintermute is at the forefront of cryptocurrency liquidity provision across major trading platforms. We specialize in offering a wide array of OTC trading solutions and are committed to advancing high-profile blockchain initiatives alongside traditional financial institutions transitioning into the crypto ecosystem. Additionally, our Wintermute Ventures division invests in pioneering DeFi projects.Since our inception in 2017, Wintermute has adeptly navigated the ever-changing landscape of the cryptocurrency market. We pride ourselves on blending the rigorous technology standards of high-frequency trading firms with the dynamic and innovative culture characteristic of technology startups. Our vision is rooted in the transformative potential of blockchain, and we are dedicated to shaping a compliant and progressive market for digital assets. Discover more about us here.Position OverviewWe are looking for a skilled C++ Developer to join our expanding options trading team—one of the largest electronic trading desks within the crypto options market. In this pivotal role, you will work closely with our traders to develop high-performance, scalable options trading systems. Your engagement will span the full options stack, promoting business growth across centralized finance, decentralized finance, and OTC. The ideal candidate will demonstrate strong problem-solving abilities and thrive in a fast-paced environment.

About WintermuteWintermute is a pioneering technology firm and one of the largest algorithmic trading companies specializing in digital assets. We excel at providing liquidity across a multitude of cryptocurrency exchanges and trading platforms, offering a wide array of OTC trading solutions, while also bolstering high-profile blockchain initiatives and traditional financial institutions venturing into the crypto space. Additionally, Wintermute operates a ventures arm that invests in promising early-stage DeFi projects.Since our inception in 2017, Wintermute has adeptly navigated through various industry cycles. Culturally, we blend the technological excellence of high-frequency trading firms in traditional markets with the innovative spirit of technology startups. At Wintermute, we are committed to harnessing the transformative potential of blockchain technology. Our long-term vision focuses on the digital asset market, and we strive to play a leading role in establishing an innovative and compliant trading environment. You can learn more about us here.Join Our Team at WintermuteWe are on the lookout for a passionate C++ Trading Platform Developer who possesses a keen interest in both the intricate details of computer hardware and the overarching design of large-scale systems, including data infrastructure. Ideal candidates will have a natural curiosity to explore the inner workings of systems, a solid understanding of data structures, and experience in writing client-server network applications. Additionally, proficiency in writing and optimizing high-performance code is essential. We value both your commercial experience and personal projects that showcase your dedication to technology. A genuine interest in algorithmic and quantitative trading will be considered advantageous.At Wintermute, you will have the opportunity to grow your skills and make a direct impact on our trading activities by developing and enhancing various components of our trading platform, data infrastructure, and related software. You will receive mentorship and insights from seasoned developers and traders, including the founders of the company. Expect a high degree of independence and responsibility from the outset, with a learning curve that is second to none. We do not have legacy systems, excessive approvals, or bureaucracy; all developers report directly to the CTO, who is actively involved in day-to-day operations. Your contributions will be evaluated based on their impact rather than the hours you log.

About WintermuteWintermute is a pioneering technology firm and one of the foremost algorithmic trading companies specializing in digital assets. Our mission is to provide liquidity across a diverse range of cryptocurrency exchanges and trading platforms. We also offer comprehensive OTC trading solutions while supporting prominent blockchain initiatives and traditional financial institutions transitioning into the crypto space. Additionally, Wintermute Ventures invests in early-stage DeFi projects, further enhancing our influence in the industry.Founded in 2017, Wintermute has adeptly navigated through various industry cycles. We blend the high-frequency trading standards of traditional markets with the innovative spirit of technology startups. At Wintermute, we are committed to harnessing the disruptive potential of blockchain technology, maintaining a long-term perspective on the digital asset market, and leading the way in establishing a compliant and innovative trading environment. To learn more, please visit our website.Join Our TeamWe are on the lookout for a passionate C++ Quant Developer who thrives on technology and possesses a keen interest in both the intricate details of computer hardware and the overarching design of expansive systems, including data infrastructure. The ideal candidate enjoys exploring the inner workings of technology, has a solid understanding of data structures, and possesses experience in developing client-server network applications and optimizing high-performance code. We value prior experience from personal projects as well as professional backgrounds. A PhD in mathematics is common among our Quant Developers, and a solid grasp of mathematical concepts is essential. An interest in algorithmic and quantitative trading is a bonus.At Wintermute, you will have the unique opportunity to directly influence our trading activities by developing and enhancing various aspects of our trading platform, data infrastructure, and related software. You will receive guidance from seasoned developers and traders, including our founders. Expect immediate responsibility and independence, enabling you to learn at an unparalleled pace! We operate without legacy systems, bureaucratic hurdles, or multiple approval layers; all developers report directly to our hands-on CTO. The impact you make is truly up to you!

About WintermuteWintermute is a prominent technology unicorn and one of the leading algorithmic trading firms specializing in digital assets. We excel in providing liquidity across a wide range of cryptocurrency exchanges and trading platforms, offer diverse OTC trading solutions, and support significant blockchain projects and traditional financial institutions transitioning into the crypto space. Additionally, Wintermute Ventures actively invests in early-stage DeFi projects.Founded in 2017, Wintermute has adeptly navigated through various industry cycles. We blend the rigorous technological standards of high-frequency trading firms with the innovative spirit characteristic of tech startups. At Wintermute, we are committed to harnessing the innovative potential of blockchain technology and hold a long-term vision for the digital asset market, positioning ourselves as leaders in establishing a creative and compliant marketplace. Discover more about us here.Join Our DeFi TeamWe are seeking an enthusiastic and inquisitive student to join our DeFi team for a 6-month internship. In this role, you will research on-chain protocols and conduct data-driven experiments that contribute to our understanding of decentralized finance.Our trading philosophy is fundamentally technological—our traders are analytical and programmatic problem solvers who thrive on innovation. In true DeFi fashion, this position offers you the chance to take on various roles, working across multiple codebases and languages to explore the ecosystem's design frontiers.We pride ourselves on being a close-knit, collaborative team that values open communication and creative exploration. You will collaborate closely with seasoned traders and developers, receiving mentorship while being encouraged to express your perspectives, challenge ideas, and explore new avenues of inquiry collectively.

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

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

About Caxton Associates:Founded in 1983, Caxton Associates is a prestigious global trading and investment firm with a strong presence in major financial hubs, including New York, London, Bengaluru, Monaco, Singapore, and Dubai. The firm specializes in managing client and proprietary capital through a diverse suite of investment products tailored to meet the unique requirements of its investors. Utilizing a multi-portfolio manager approach, Caxton excels in discretionary global macro investing, drawing on its extensive expertise across various asset classes and markets.About the Role:We are on the lookout for a dedicated Trading Support Engineer to become an integral part of our London Tradeflow team. In this role, you will play a crucial role in supporting front-office trading operations, ensuring the seamless flow of orders and executions across both internal and external trading systems.This hands-on production support position emphasizes monitoring live trading activities, analyzing order and execution flows, and troubleshooting any issues related to FIX connections and internal systems. You will collaborate closely with trading, operations, and global technology teams to guarantee timely and accurate trade processing.Success in this role demands meticulous attention to detail, excellent communication skills, and the ability to remain composed in fast-paced, time-sensitive environments.Responsibilities:As a valued member of the Tradeflow support team, your key responsibilities will include:Monitoring and supporting trade, order, and execution flows across FIX connections, internal order management systems, and external brokers and trading venues.Analyzing FIX message traffic (including orders, cancellations, rejections, and executions) to identify and resolve routing or workflow issues.Assisting with Bloomberg AIM order and execution workflows.Investigating trade breaks, discrepancies, and missing or delayed executions.Providing support for troubleshooting session drops, connectivity issues, and counterparty rejections.Coordinating with brokers, trading desks, and operations teams to address daily production challenges.Escalating incidents as necessary and providing clear status updates to stakeholders.Maintaining documentation and contributing to operational runbooks and procedures.Requirements:1–3 years of experience in supporting trading, middle office, or financial systems.Fundamental understanding of FIX messaging and the order-to-trade lifecycle.Familiarity with financial markets and execution workflows.Strong analytical and problem-solving abilities.Basic scripting skills, preferably in Python.Proficiency with log analysis and monitoring tools.Experience with version control systems (e.g., Git).Some knowledge of SQL and relational database schemas would be advantageous.Excellent written and verbal communication skills.Ability to work efficiently under pressure in time-sensitive trading environments.Exhibits and adheres to the highest ethical standards.

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.

At Jump Trading Group, we are dedicated to pioneering world-class research in the fields of Mathematics, Physics, and Computer Science. We empower extraordinary talents to explore scientific frontiers and apply avant-garde research to global financial markets. Our distinct culture fosters constant innovation, demanding creativity, intellectual honesty, and a fiercely competitive spirit. We believe in collective success and aim to unlock unique individual talents through collaboration and mutual respect. Research outcomes at Jump go beyond delivering superior risk-adjusted returns; we develop and deploy transformative technologies, support start-ups across diverse industries, and collaborate with leading global research organizations and academies to tackle pressing challenges. We are seeking a motivated Software Engineer to join one of our expanding quantitative trading teams. In this role, you will collaborate closely with traders and technologists to manage trading and operational challenges, ensuring the deployment process for the team’s production trading systems is scalable and fault-tolerant. Your responsibilities will include crafting and maintaining a sophisticated Python infrastructure, configuring production servers, and keeping all information sources for production processes current. The ideal candidate will possess a passion for development, a desire to learn about automated electronic trading, and the ability to tackle complex technical problems in a fast-paced and dynamic setting. This position promises exposure to a wide array of intriguing and challenging issues. The trading team views technology as an essential element of their ongoing success, and candidates will have the opportunity to work with cutting-edge technologies.