Automation Test Engineer

Senior Test Automation Engineer – SC Cleared Remote - £600 PD Inside IR 35 – 6 moths

A leading public sector organisation is seeking an experienced Senior Test Automation Engineer to play a key role in the delivery of a large-scale digital transformation programme. The chosen candidate must have experience in Playwright or Cypress, Kotlin and TypeScript with API testing. This is an opportunity to work within a complex enterprise environment, helping to ensure the quality, resilience, and performance of critical services that support thousands of users across the UK.

Working within a multidisciplinary Agile team, you will be responsible for designing, building, and maintaining automated testing frameworks across UI, API, and end-to-end testing layers. You will work closely with developers, business analysts, and operational stakeholders to ensure robust testing coverage across multiple interconnected systems.

Key Responsibilities

Design and implement automated test frameworks for UI, API, integration, and end-to-end testing.

Develop and maintain automated tests using Playwright and/or Cypress.

Test services built using Kotlin and TypeScript technologies.

Validate complex integrations between modern platforms and legacy systems.

Deliver API testing across multiple services and enterprise applications.

Perform resilience and failure testing, including timeout, degradation, and dependency failure scenarios.

Implement and maintain contract testing frameworks using tools such as PACT.

Verify cross-system data propagation and state changes across integrated platforms.

Create and maintain smoke, regression, and core user journey test suites covering both happy and unhappy paths.

Test data flows, imports, exports, synchronisation processes, and data integrity controls.

Support feature-flagged releases and validate behaviour across multiple feature configurations.

Execute performance and load testing activities using tools such as Gatling.

Support and coordinate User Acceptance Testing (UAT) activities with operational stakeholders.

Contribute to continuous improvement of testing standards, processes, and automation capabilities.

Essential Skills & Experience

Strong experience designing and implementing enterprise-scale automated testing frameworks.

Hands-on expertise with Playwright and/or Cypress.

Proven experience testing applications and services developed in Kotlin and TypeScript.

Strong API testing experience within complex distributed environments.

Experience testing integrations between multiple systems and services.

Knowledge of resilience testing, fault injection, timeout handling, and service degradation scenarios.

Experience with contract testing tools such as PACT.

Strong understanding of test automation best practices and CI/CD integration.

Experience validating data integrity across complex data flows and synchronisation processes.

Knowledge of PostgreSQL, SQL, and database-driven testing approaches.

Ability to test edge cases, exception handling, and operational failure modes.

Experience supporting large-scale UAT programmes.

Excellent stakeholder management and communication skills.

Desirable Experience

Experience with data migration testing, including mapping, transformation, and validation.

Exposure to criminal justice, government, or highly regulated environments.

Experience with performance and load testing tools such as Gatling.

Knowledge of large-scale distributed architectures and microservices environments.

What's on Offer?

Opportunity to work on a high-profile national transformation programme.

Complex enterprise-scale technology environment.

Collaborative Agile delivery teams.

Long-term contract potential.

If you are an experienced Test Automation Engineer with a passion for quality engineering, automation, and delivering resilient enterprise solutions, we'd love to hear from you.