API QA / 508 / Test Engineer

Overview DecisionPoint seeks an API QA / 508 / Test Engineer to perform comprehensive testing of enterprise APIs and integration workflows within a large federal and DoD-aligned mission environment. This role executes automated and manual API test suites, validates schemas and contract behavior, performs negative and error-handling tests, and supports regression testing for API version updates and integration changes. The API QA / 508 / Test Engineer ensures enterprise APIs remain reliable, secure, accessible, and compliant. This role collaborates closely with integration engineers, API developers, cybersecurity personnel, and product teams to validate API readiness across all environments. This position is fully remote. Duties & Responsibilities The API QA / 508 / Test Engineer will: Develop and execute API contract tests, schema validation tests, and endpoint-level test cases. Perform end-to-end integration testing across API workflows, middleware, and consuming applications. Conduct negative testing, error-path validation, boundary conditions, and rate-limit testing. Validate accessibility compliance for API documentation, developer portals, and related interfaces (Section 508/WCAG). Test API version migrations, deprecations, and regression scenarios for updated endpoints. Use API testing tools (Postman, SoapUI, ReadyAPI, or similar) to execute automated and manual test suites. Validate payloads, schema enforcement, authentication behavior, and token flows (OAuth2, SSO