Lead Mainframe Developer

Lead Mainframe Developer Location: Indianapolis, IN / Plano, TX / Boston, MA / Portsmouth, NH / Seattle, WA – onsite / Hybrid (as per client requirement) Experience Required: 5–8 Years (Strictly Development – No Production Support Profiles) Job Summary We are seeking a highly skilled Lead Mainframe Developer with strong hands-on experience in IBM Mainframe technologies including COBOL, JCL, IMS DB, DB2, MQ Series, and Xpeditor. The ideal candidate is a true developer (not production support), capable of designing, coding, testing, and delivering robust mainframe applications. This role requires strong analytical ability, excellent communication, and a proactive mindset. Key Responsibilities Application Development Design, develop, code, test, and maintain mainframe applications. Perform detailed unit, integration, and contract-level testing. Peer-review code, technical design documents, and provide improvement feedback. Assist QA teams with test execution, defect analysis, and validation. Issue Resolution & Support Participate in on-call rotation to resolve application failures. Troubleshoot system performance issues and collaborate with infra/support teams. Analyze and resolve issues related to business data processing. Provide root-cause analysis and implement permanent fixes. System Monitoring & Performance Monitor application and batch job performance. Collaborate with respective support teams to resolve software and hardware issues. Ensure stability, reliability, and high availability of mainframe applications. Collaboration & Leadership Lead discussions in virtual and cross-functional environments. Ask the right questions, provide recommendations, and drive improvements. Mentor junior developers when needed and support team maturity. Required Technical Skills IBM Mainframe Technologies: COBOL, JCL, IMS DB, DB2 Tools & Utilities: MQ Series, Xpeditor Strong mainframe debugging and performance-tuning skills Hands-on experience writing & reviewing complex COBOL and JCL code Strong testing experience: Unit, Integration, Contract-level testing Working knowledge of Spring Boot (basic understanding is sufficient) Working knowledge of Git for version control Tech One IT J-18808-Ljbffr