Mainframe Developer

Job Title

Responsibilities:

• Design, develop, maintain, and enhance enterprise mainframe applications supporting critical business functions.
• Develop and support applications using COBOL, JCL, CICS, DB2, VSAM, and Syncsort.
• Analyze and resolve complex production issues, perform root cause analysis, and implement long-term solutions.
• Support both batch and online transaction processing while ensuring high availability and operational stability.
• Collaborate with distributed engineering teams developing Java, Spring Boot, REST APIs, and AWS-based applications.
• Participate in application modernization initiatives, API integration, and cloud transformation efforts.
• Perform code reviews, testing, deployment support, and production readiness activities.
• Create and maintain technical documentation, operational runbooks, and knowledge transfer materials to reduce key-person dependency.
• Partner with engineering teams to continuously improve application performance, reliability, monitoring, and operational perfection.

Required Qualifications:

• 8+ years of enterprise Mainframe development experience.
• Strong expertise in:
• COBOL
• JCL
• CICS
• DB2 (Native SQL and COBOL Stored Procedures)
• VSAM
• Syncsort
• Experience designing and integrating REST APIs using XML and JSON.
• Experience supporting high-volume, mission-critical production systems.
• Strong troubleshooting, analytical, and problem-solving skills.
• Experience working in Agile development environments.

Preferred Qualifications:

• Working knowledge of Java, Spring Boot, and AWS.
• Experience with API testing tools such as Insomnia or Postman.
• Experience integrating mainframe applications with distributed systems.
• Familiarity with CI/CD and DevOps practices.
• Experience supporting application modernization and cloud migration initiatives.
• Excellent communication, collaboration, and documentation skills.