Collabera Digital is seeking a skilled Mainframe Tester to join our team. As a Mainframe Tester, you will be responsible for conducting 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.

• 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.