Senior Tester at Endava

What this person will do or some project details: Work Location : Hybrid 3 days onsite at Bloomfield, CT (Preferred) or Franklin, TN  We are seeking a Senior End-to-End Integration QA Engineer to support the CMS Burden Reduction / CMS Interoperability program. This role is heavily focused on API testing and validation of HL7 FHIR-based healthcare APIs, ensuring regulatory compliance, data integrity, and high-quality end-to-end integrations across complex healthcare systems.   Key Responsibilities • API-Focused End-to-End Testing • Own and execute end-to-end API and integration testing for CMS Burden Reduction initiatives • Validate HL7 FHIR-based REST APIs including payloads, schemas, headers, authentication, and error handling • Perform deep API validation across upstream and downstream systems and integration partners • Ensure data accuracy, integrity, and regulatory compliance across API workflows • Agile & Program Enablement • Participate in Pre-PI Planning, PI Planning & break-outs, Release retrospectives, and Technical Design walkthroughs • Engage in Sprint Planning, daily stand-ups, and System Demos as part of System QA/QE • Test Planning, Design & Execution • Contribute to Test Strategy during PI Planning (scenarios, dependencies, risks, regression impact) • Provide end-to-end test estimates for assigned features (story points) • Define and review Acceptance Criteria using GIVEN-WHEN-THEN format • Design, automate, and execute end-to-end test scenarios (positive, negative, integration) • Identify test data needs and provide inputs for integrated test environment setup • Execute tests based on business priority and critical paths • Walk through test evidence and provide demos for feature acceptance • Defect Management & Governance • Collaborate with Product Owner, Architects, Developers, RTE, and QE Leads on defect management • Support warranty and post-production validation • Maintain daily Jira updates for features, test execution, and defects Required Skills & Experience • 8+ years of experience in End-to-End / Integration QA • Strong hands-on API testing expertise (must-have) • Extensive experience using Postman for API validation • Strong knowledge of HL7 FHIR, Healthcare Interoperability, and CMS Burden Reduction • Experience with Playwright for API and UI integration scenarios • Strong experience with Jira for test and defect management • Experience working in Agile / SAFe environments  Tools & Technologies: • Postman (required) • Playwright • Jira • REST APIs, HL7 FHIR • CI/CD-aligned testing • Nucural (preferred)Key Stakeholders: • Solution QE Lead, Product Owner, Developers, Solution Train Engineer (RTE) Architects