Cards Mainframe Developer at Chicago, IL (Onsite)-Contract

Title: Cards Mainframe Developer

Location: Chicago, IL

Onsite

Contract

Job Description:

Mainframe Developer 2-6 Years Experience

We are looking for an experienced Mainframe Developer with strong expertise in COBOL JCL DB2 VSAM and Unix Shell Scripting The ideal candidate will be responsible for developing supporting and optimizing mainframe applications building automation scripts managing backend integration workflows and ensuring reliability across production and batch systems This role requires strong technical skills problem solving capabilities and the ability to work effectively with cross functional teams

Key Responsibilities

Mainframe Development  Support

• Develop enhance and maintain applications using COBOL JCL VSAM and DB2
• Troubleshoot debug and resolve mainframe application issues across development testing and production environments
• Optimize JCL COBOL programs and DB2 queries to improve system performance and efficiency
• Support daily batch processing ensure job success and resolve job abends promptly

Unix Shell Scripting Backend Integration

• Develop and maintain UnixLinux Shell Scripts for automation batch scheduling and system integrations
• Ensure seamless integration between Unixbased automation and mainframe backend systems
• Troubleshoot and enhance existing scripts improving stability and execution performance

Database PLSQL Development

• Develop and maintain PLSQL procedures functions packages and triggers
• Perform SQL tuning and optimize database queries for performance
• Integrate shell scripts with relational databases Oracle DB2 MySQL or similar

Production Support Performance Optimization

• Monitor scheduled jobs resolve production incidents and ensure overall batch stability
• Conduct rootcause analysis RCA and implement permanent fixes
• Enhance performance of scripts jobs and database queries through continuous tuning

Collaboration Documentation

• Work closely with stakeholders to gather requirements and translate them into scalable solutions
• Participate in Agile ceremonies and collaborate with QA business and support teams
• Create and maintain technical documentation including design specs support guides and system documentation

Required Technical Skills

• Strong handson experience in Mainframe technologies COBOL JCL VSAM DB2
• Solid expertise in UnixLinux Shell Scripting
• Strong SQL and PLSQL skills procedures functions triggers packages
• Experience integrating shell scripts with relational databases
• Strong debugging analytical and problemsolving skills
• Good understanding of batch processing and automation workflows
• Ability to work independently and collaboratively within a team

Preferred  Good to Have

• Experience in banking cards or financial services domains
• Experience with ticketing tools and production support processes
• Familiarity with Git CICD pipelines or DevOps practices
• Knowledge of Python or Java for extended automation or backend integrations

Additional mainframe skills such as

• COBOL PLI Assembler CC
• CICS IMS and system administration on DB2CICSIMS
• REXX scripting for automation and migration tasks
• Strong troubleshooting skills for IBM mainframe productrelated issues