Mainframe Developer

Job Description

About the Role We are seeking a highly skilled COBOL / DB2 SDET with strong automation and healthcare payer experience to support testing of critical mainframe and distributed applications. The ideal candidate will have expertise across mainframe technologies, DB2 databases, APIs, batch systems, and test automation frameworks. Key Responsibilities • Design and execute test strategies for complex mainframe and distributed applications. • Validate COBOL, DB2, JCL, CICS, IMS, and batch processing workflows. • Develop automation frameworks for API, database, and integration testing. • Validate end-to-end business processes across mainframe and modernized applications. • Perform data reconciliation and database validation across multiple platforms. • Test inbound and outbound interfaces, file transfers, and EDI transactions. • Support release testing, production validation, and defect triage activities. • Collaborate with developers, business analysts, architects, and product teams. • Participate in automation initiatives to improve quality and testing efficiency. • Develop test data management and validation solutions for large-scale systems. Required Skills & Qualifications Mainframe Technologies • Strong experience with: o COBOL o DB2 o JCL o CICS o VSAM o IMS (preferred) Testing & Automation • Experience in automation of APIs, databases, and integration layers. • Strong knowledge of test automation frameworks. • Experience with: o Selenium o Rest Assured o Cucumber BDD o Postman o Service Virtualization tools Database & Data Validation • Advanced DB2 SQL skills. • Data migration and reconciliation testing experience. • Strong knowledge of data analysis and validation techniques. Integration & Messaging • Experience with: o MQ Series / IBM MQ o Kafka (preferred) o File-based integrations o Batch processing systems Performance & DevOps • Experience with: o JMeter o Jenkins o Git o CI/CD pipelines o Test Management tools Agile Delivery • Experience working in Agile/Scrum environments. • Strong analytical and troubleshooting skills. Preferred Qualifications Healthcare Payer Experience Experience in one or more of the following: • Claims Processing • Membership & Enrollment • Benefits Configuration • Provider Management • Care Management • Pharmacy Benefits • EDI Transactions (834, 835, 837, 270/271) • Medicare/Medicaid Programs • FHIR and Interoperability initiatives Nice to Have • Java and Spring Boot exposure. • API Automation experience. • Cloud migration testing experience. • Mainframe modernization projects. • Experience in Quality Engineering transformation programs.