Senior Test Automation Engineer

October 14, 2026

Hybrid

Senior

London

Description

Capgemini is hiring a Senior Test Automation Engineer in London to design, build and maintain automated testing solutions across APIs, event-driven architecture, identity and access management and end-to-end user journeys. This is a hands-on engineering role embedded within an Agile delivery team, driving quality through automation, shift-left testing and continuous integration practices. The role covers Kafka event stream validation, contract, performance and resilience testing, with automation integrated into GitLab CI/CD pipelines.

Responsibilities

Design, develop and maintain API contract, integration, end-to-end, performance and resilience testing frameworks
Develop automated test suites using Jest, TypeScript, JUnit, Gradle and Playwright
Build and maintain Kafka testing frameworks for event streams, consumer behavior, lag management and replay scenarios
Validate event contracts and payloads using JSON Schema, AJV and contract testing methodologies
Design and execute performance, load and scalability tests for policy evaluation services and event ingestion platforms
Automate testing for identity authentication, authorization, token lifecycle, revocation and fail-closed security scenarios
Integrate automation suites into GitLab CI/CD pipelines with quality gates, automated reporting and deployment readiness checks
Create and maintain clear test reporting using Allure or equivalent reporting frameworks
Collaborate with developers to promote TDD, BDD, specification by example and defect prevention practices
Support continuous improvement of testability, observability and quality engineering standards across the platform

Requirements

Strong hands-on experience in test automation across APIs, microservices, distributed systems and event-driven architectures
Proficiency with Jest, TypeScript, Playwright, JUnit and Gradle
Practical experience testing Apache Kafka including topic seeding, asynchronous validation, lag monitoring and replay testing
Expertise in contract testing, API validation, JSON Schema and AJV
Experience conducting performance, load and resilience testing for low-latency and high-throughput systems
Strong knowledge of CI/CD quality gates, automated test reporting, test data management and release validation
Understanding of TDD, BDD, mocking frameworks, specification by example and shift-left quality engineering
Familiarity with Java and Spring Boot applications to support test automation and service validation
Experience with Docker, Docker Compose and GitLab CI/CD pipelines
Hands-on experience using AI-assisted engineering tools such as Claude Code or GitHub Copilot
Experience testing OPA/Rego policy engines and authorization decision services (desirable)
Knowledge of OAuth 2.0, OpenID Connect, Ping Identity, LDAP and IAM testing frameworks (desirable)
Experience with Allure reporting, quality dashboards and test trend analysis (desirable)
Familiarity with service mesh, API gateways, mTLS certificate management and security-focused testing (desirable)
Exposure to highly regulated environments such as banking, financial services, insurance or public sector (desirable)

Conditions

Hybrid working blending company offices, client sites and home, without the ability to work 100% from home
Accredited Great Place to Work for Wellbeing in 2024 with trained Mental Health Champions
Access to wellbeing apps such as Thrive and Peppy
Learning for life mindset with access to 250,000 courses and external certifications
Training and development opportunities from thinktanks to hackathons
Recognised as one of the World's Most Ethical Companies by Ethisphere for 13 consecutive years

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