This Full Stack Engineer role in London is onsite three days per week, embedded in the heart of high-frequency trading environments. You shape the backbone of real-time market data distribution, collaborating with quantitative, trading, and engineering teams to push the limits of speed and reliability. The market rewards those who build platforms that never miss a tick.
Responsibilities
- Design, develop, and maintain high-performance, ultra-low-latency software applications and market data distribution systems
- Build, tune, and support low-latency network programming solutions and kernel bypass architectures on Linux environments
- Develop and enhance high-throughput, low-latency components using Core Java and C++
- Manage deployments, tooling, and infrastructure automation using internal and enterprise deployment pipelines (including UBS Bluezone and UBSDeploy)
- Integrate, optimize, and distribute real-time market data across over 70 proprietary direct feeds in EMEA, US Options, and MIFID II market structures
- Collaborate with cross-functional quantitative, trading, and engineering teams to deliver extremely reliable, fault-tolerant, and sub-microsecond resilient systems
- Perform rigorous performance analysis, latency troubleshooting, and system tuning of applications, network stacks, and market data distribution protocols (Denali, MPAC, Beacon, Refinitiv ETA)
- Support knowledge transfer and handover activities as part of project onboarding and cross-team enablement
Requirements
- 5–10 years of software engineering experience in high-frequency trading (HFT), financial markets, or ultra-low-latency environments
- Strong hands-on development expertise with Core Java and C++
- Deep expertise in Linux systems, kernel bypass low-latency tuning, and low-latency network programming
- Expert knowledge of market data distribution protocols, including Refinitiv ETA, Denali, MPAC, and Beacon
- Comprehensive domain knowledge across EMEA, US Options, and MIFID II market structures, alongside experience with over 70 proprietary direct feeds
- Experience with deployment and management tools such as client Bluezone and client Deploy
- Strong performance tuning, profiling, and network/application troubleshooting skills
- Excellent problem-solving, analytical, and communication abilities
Nice to Have
- Entrepreneurial mindset with a proactive, ownership-driven approach in high-pressure trading floors
- Experience in event-driven architecture, distributed systems, and hardware-software co-design
- Knowledge of CI/CD practices, automated testing, and DevOps automation tailored for low-latency builds
- Experience working in large-scale enterprise financial environments and electronic trading desks
- Familiarity with advanced monitoring, hardware timestamping, and network telemetry tools
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Fullstack Engineer (Java /C++) in City of London employer: Vallum Associates
As an Electronics Test Engineer at our company, you will be part of a dynamic and innovative team dedicated to pushing the boundaries of technology in a collaborative work environment. We offer competitive benefits, a strong focus on employee development, and opportunities for career advancement, all while being located in a vibrant area that fosters creativity and growth. Join us to make a meaningful impact in the field of electronics testing and enjoy a rewarding career with us.
