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Fullstack Engineer; Java/C++
Job in
London, Greater London, W1B, England, UK
Listed on 2026-10-20
Listing for:
Vallum Associates
Full Time
position Listed on 2026-10-20
Job specializations:
-
Software Development
DevOps
Job Description & How to Apply Below
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 Dev Ops automation tailored for low-latency builds
* Experience working in large-scale enterprise financial environments and electronic trading desks
* Familiarity with advanced monitoring, hardware time stamping, and network telemetry tools
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