QA Engineer

Location: London (3 days in office: Monday-Wednesday)
Sponsorship: Not available

About the Company

We 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 Role

You 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 Have

Experience 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 Profile

We 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.