Adecco Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone''s chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive.Job title: Senior Quality EngineerLocation: London (2 days per week onsite Mon and Thu)Contract: 6 months with possible extensionRate: £500 - £550 inside IR35Key ResponsibilitiesDesign, develop, execute, and maintain manual and automated test cases for functional, integration, system, regression, and end-to-end testing.Validate merchant onboarding journeys, our Accept application flows, payment processing, settlements, and terminal management capabilities.Execute testing across web, mobile (iOS and Android), API, and backend systems.Prepare detailed test plans, test scenarios, test cases, and test execution reports.Perform API testing and integration testing across internal and third-party platforms.Support SIT, UAT, FOV (First Occurrence Validation), production releases, and post-release verification activities.Validate business-critical payment processing and settlement workflows.Perform data validation, reconciliation, and operational testing to ensure end-to-end integrity.Identify, log, track, and verify defects through to closure using Jira or equivalent ..... full job details .....