QA EngineerLocation: London (3 days in office: Monday-Wednesday)
Sponsorship: Not available
About the CompanyWe are a provider of high-performance trading and market-data technology, delivering ultra-low-latency solutions across global markets. Our systems support demanding front-office environments where reliability, determinism, and speed are critical.
We are seeking a QA Engineer who brings strong technical capability along with the right personal qualities-energy, curiosity, and a passion for breaking things before production does.
The RoleYou will ensure the correctness, robustness, and reliability of complex trading and market-data systems. Working closely with developers and product teams, you will validate system behaviour, identify unexpected issues, and contribute to improvements across the SDLC.
This is a hands-on test engineering role for someone who enjoys deep investigation, questioning assumptions, and continuously improving testing processes.
Key Responsibilities*Design, develop, and execute test plans, test cases, and regression suites.
*Perform manual and automated testing within Linux environments.
*Write and execute scripts (Bash required) for testing and validation tasks.
*Investigate failures, analyse logs, diagnose root causes, and raise clear defect reports.
*Validate behaviour and performance of market-data and low-latency workflows.
*Collaborate with developers to reproduce issues and verify fixes.
*Contribute to improvements in testing frameworks, tools, and processes.
*Support release readiness reviews and provide QA signoff.
Required Skills & Experience*Proven QA Engineering experience in complex software systems.
*Strong Linux and Bash skills (must-have).
*Good understanding of the software development lifecycle (SDLC).
*Scripting experience: Python or C++ is a Nice to Have, but transferable skills in other languages are welcome.
*Comfortable working with CI pipelines, version control, and defect-tracking tools.
*Strong analytical and troubleshooting skills, especially in distributed or performance-sensitive systems.
Nice to HaveExperience in trading-technology or front-office environments, such as:
*Market Data
*FIX Trading / Order Flow
*Ultra-low-latency systems
*Exchange connectivity
*High-frequency trading workflows
(Not required, but highly beneficial.)
Personal ProfileWe place high value on personality and attitude. The ideal candidate is:
*Positive, energetic, and happy coming into the office.
*Naturally curious and enjoys breaking things to understand root causes.
*Adaptable, eager to learn, and comfortable in a fast-moving environment.
*Detail-oriented with a drive for quality and continuous improvement.
*A strong communicator who enjoys collaborating with cross-functional teams.





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