Non-Functional Test Engineer

September 15, 2026

Hybrid

Senior

London, UK

Description

Senior Non-Functional Test Engineer role for UK public sector programmes involving large-scale application refactoring and migration. The position focuses on full-stack quality engineering, building automation frameworks across UI, API, services, and microservices layers, and integrating automated tests into CI/CD pipelines. Responsibilities include defining test strategies, creating test artefacts, providing technical leadership, and mentoring within a complex multi-supplier environment.

Responsibilities

Define test approaches and quality strategies for large application refactoring and migration initiatives
Build and maintain full-stack automation frameworks covering UI, API, services, microservices, containers, and integrations
Create test artefacts including test plans, test scenarios, test scripts, and test data models
Automate end-to-end test execution and integrate tests into CI/CD pipelines for continuous quality checks
Develop reusable automation assets to support functional and regression testing
Execute manual and automated tests to validate application behaviour during migration
Collaborate with developers, architects, and DevOps teams to troubleshoot issues and ensure product readiness
Analyse defects, perform root cause analysis, and drive continuous quality improvement
Work effectively within a multi-supplier environment, managing dependencies across teams
Provide technical leadership, mentoring, and quality guidance within the programme

Requirements

Strong experience designing and implementing automation across UI, API, services, and integration layers
Proficiency in programming languages such as Java, JavaScript/TypeScript, Python, or C#
Hands-on experience with automation tools (Selenium, Playwright, Cypress, RestAssured, Appium, etc.)
Strong understanding of microservices, containers, and distributed architectures
CI/CD pipeline expertise (GitHub, GitLab, Jenkins, Azure DevOps, etc.)
Knowledge of test modelling, scenario design, and scalable automation patterns
Strong analytical, debugging, and communication skills
Proven ability to work confidently with cross-functional teams

Conditions

Flexible working approaches
25 days holiday in addition to public holidays
Private medical, dental and optical cover
Sabbatical programs, paid paternity leave, maternity leave and maternity returners scheme
Life assurance and group pension plan through salary sacrifice
Online shopping discounts and Employee Assistance Program

SeleniumPlaywrightJavaPythonCI/CDDockerpublic sectorCypressRestAssuredAppium

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