QA Automation Engineer in London

Overview

We're supporting a financial services organisation undergoing major platform modernisation and are looking for a QA Automation Engineer to join a team building a new core ledger and billing platform.

This is a hands‑on automation role suited to someone who enjoys testing complex, business‑critical systems where correctness matters.

The role spans backend services, APIs, event flows, and frontend applications, with a strong focus on automation, regression coverage, and quality engineering best practice.

Responsibilities

• Own and evolve automated testing across unit, integration, contract, end‑to‑end, and UI layers.
• Build automation coverage for backend services, APIs, workflows, event‑driven components, and frontend applications.
• Design robust test scenarios covering edge cases, exception handling, concurrency, and regression risk.
• Create and maintain reusable test data, environments, and scenario frameworks.
• Support contract testing across multiple systems and downstream customers.
• Build quality gates within CI/CD pipelines and improve reliability of automated suites.
• Partner with engineers early in the lifecycle to review designs, shape test plans, and shift quality left.
• Support defect analysis, triage, and continuous improvement of testing practices.
• Help improve overall testing maturity and contribute to scalable quality engineering approaches.
• Use AI‑enabled tooling pragmatically to accelerate test creation, coverage analysis, and troubleshooting while maintaining engineering judgement.

Qualifications

• Strong experience in QA automation, SDET, or software test engineering roles.
• Proven background testing both backend services and modern web applications.
• Strong programming capability in Python.
• Good experience with modern UI test automation frameworks such as Playwright, Cypress, or Selenium.
• Experience with backend/API testing and integration testing.
• Familiarity with CI/CD pipelines such as Git Hub Actions.
• Experience working in cloud‑based engineering environments.
• Strong instinct for edge cases, race conditions, test reliability, and regression risk.
• Excellent written communication and collaboration skills.
• Comfortable working closely with engineers and product stakeholders in agile delivery teams.

Desirable Experience

• Experience testing financial systems, billing platforms, ledger platforms, payment systems, or other high‑integrity transactional products.
• Exposure to React frontends.
• Familiarity with tools such as Cucumber.
• Experience with SQL and validating data across relational systems.
• Experience with performance or load testing.
• Experience using AI coding or testing tools in day‑to‑day engineering workflows.
• Experience with test architecture or broader quality strategy.
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