Remote Mainframe Developer: COBOL/NATURAL/ADABAS Expert

CAI; Denver (CO); Remote; USD 77,000 - 84,000; Full time

Job summary

CAI is seeking an experienced Mainframe Developer to join our IT team. The role is full-time, remote, and contracts-based, focusing on COBOL, JCL, NATURAL, and ADABAS in a multi-client environment.

You will develop and maintain mainframe programs, analyze legacy systems, support taxation and client data interfaces, and collaborate on system design reviews and documentation to enable modernization efforts.

Qualifications

• 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

Responsibilities

• Develop, enhance, and maintain COBOL, NATURAL, and JCL programs supporting client projects
• Work on legacy mainframe applications and integration efforts involving taxation and client systems
• Analyze existing mainframe applications and provide code walkthroughs and documentation
• Design, code, test, implement, and maintain batch and online mainframe apps
• Troubleshoot production issues, job failures, and system abends; perform root cause analysis
• Analyze and support ADABAS databases, file structures, and data access methods
• Develop and maintain data feeds, interfaces, file layouts, and integration processes
• Participate in system design reviews, technical planning sessions, and code reviews
• Create and maintain technical documentation including program specs, job flows, system diagrams
• Support system testing, integration testing, UAT, and production deployments

Skills

COBOL

JCL

NATURAL

TSO/ISPF

ADABAS

Batch processing

Troubleshooting

System analysis

Tools

ADABAS tooling

CICS

Mainframe utilities

Job scheduling tools

Job description

CAI is seeking an experienced Mainframe Developer to join our IT team. The role is full-time, remote, and contracts-based, focusing on COBOL, JCL, NATURAL, and ADABAS in a multi-client environment.

You will develop and maintain mainframe programs, analyze legacy systems, support taxation and client data interfaces, and collaborate on system design reviews and documentation to enable modernization efforts.