Mainframe Tester

Job Title: Mainframe Tester-Payments Location: UK, Chester (Hybrid-3 days a week onsite) Responsibilities: * Conduct end-to-end testing of mainframe-based payment systems, including transaction processing, batch jobs, and interfaces with external systems. * Develop and execute test cases, scripts, and procedures to verify application functionality, performance, and adherence to business requirements. * Collaborate closely with business analysts, developers, and stakeholders to understand project requirements and ensure comprehensive test coverage. * Perform system integration testing (SIT), user acceptance testing (UAT), and regression testing to validate changes and enhancements. * Identify, analyse, and document defects and issues encountered during testing, and work with development teams to resolve them promptly. * Maintain test environments, test data, and test artifacts to support ongoing testing activities. * Participate in test planning, estimation, and review meetings to ensure testing milestones are achieved on schedule. * Provide status updates, test results, and metrics to project teams and management stakeholders. Requirements/Qualifications and Skills: * Proven experience as a Mainframe Tester, with a focus on Payments projects and the banking domain. * In-depth knowledge of mainframe technologies (e.g., COBOL, JCL, VSAM, CICS) and payment protocols (e.g., ISO 8583, SWIFT). * Strong understanding of payment processing workflows, including clearing and settlement processes. * Experience with testing tools such as IBM Rational Functional Tester, HP Quality Centre, or similar. * Familiarity with test automation frameworks and scripting languages (e.g., Selenium, Python) is a plus. * Excellent analytical and problem-solving skills, with a meticulous attention to detail. * Ability to work effectively both independently and as part of a team in a dynamic environment. * Good communication skills and the ability to interact professionally with diverse stakeholders