Jobs → Engineering → Mainframe Developer

About the Role We are seeking a highly skilled and experienced Mainframe Developer to join our IT team. This position will be full-time, remote, and is a contract position focused on developing, enhancing, and maintaining mainframe applications. Key Responsibilities • Develop, enhance, and maintain COBOL, NATURAL, and JCL programs supporting multiple client projects • Work on multiple legacy mainframe applications and integration efforts involving taxation and client systems • Analyze existing mainframe applications and provide code walkthroughs, technical analysis, and documentation to support modernization teams • Design, code, test, implement, and maintain new and existing batch and online mainframe applications • Troubleshoot production issues, job failures, and system abends; perform root cause analysis and implement corrective actions • Analyze and support ADABAS databases, file structures, and data access methods • Develop and maintain data feeds, interfaces, file layouts, and integration processes between legacy systems and modernized platforms • Participate in system design reviews, technical planning sessions, and code reviews • Create and maintain technical documentation including program specifications, job flows, system architecture diagrams, and data definitions • Support system testing, integration testing, user acceptance testing (UAT), and production deployments Requirements • 5+ years of experience developing enterprise mainframe applications using COBOL • 5+ years of experience with JCL development and job scheduling • 3+ years of experience with NATURAL/ADABAS • 5+ years of experience using TSO/ISPF or similar mainframe editing tools • 3+ years of experience with AFP, PAGEDEF, FORMDEF, and OVERLAY technologies • Advanced expertise in COBOL, JCL, and NATURAL programming • Working knowledge of ADABAS database architecture and file structures • Experience maintaining and enhancing large legacy mainframe systems • Strong troubleshooting, debugging, and problem-solving skills for batch and online applications • Experience developing system integrations, data interfaces, file transfers, and data feeds • Ability to analyze technical specifications, system workflows, and data models • Experience with mainframe utilities, job monitoring tools, and debugging tools