Lead Mainframe Developer

Lead Mainframe DeveloperLocation: Indianapolis, IN / Plano, TX / Boston, MA / Portsmouth, NH/ Seattle, WA - onsiteOnsite / Hybrid (as per client requirement)Experience Required:5–8 Years (Strictly Development — No Production Support Profiles)Job SummaryWe 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 ResponsibilitiesApplication 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

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