Kforce has a client that is seeking a Capital Markets QA Engineer - API in San Diego, CA. Summary: The IT QA Engineer is responsible for ensuring the quality and reliability of software solutions with a strong emphasis on API validation, system integration, and end-to-end functional testing. This role collaborates closely with cross-functional teams to validate that integrations between systems meet business and technical requirements, particularly within the mortgage capital markets or mortgage servicing domain. Essential Functions: * Collaborate with agile team members to define and execute test strategies focused on API and system integration validation * Analyze complex software systems and design test approaches to ensure seamless data flow and interoperability across platforms * Participate in integration testing across internal and third-party systems, ensuring data consistency and business rule alignment * Identify root causes of integration issues and work with developers and business analysts to resolve them * Validate API endpoints, payload structures, and response behaviors using tools like Postman or similar * Ensure traceability of test cases to business and technical requirements * Document test results and communicate findings clearly to stakeholders * Contribute to continuous improvement of QA processes and integration validation practices * Support cross-product, end-to-end testing efforts across the mortgage technology stack