Mainframe Developer (3+ yrs experienced) Onsite Chicago, IL

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Onsite - Chicago, IL

Job Description

We are looking for 3+ years 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 Unix/Linux Shell Scripts for automation, batch scheduling, and system integrations.
• Ensure seamless integration between Unix-based automation and mainframe backend systems.
• Troubleshoot and enhance existing scripts, improving stability and execution performance.

Database & PL/SQL Development
• Develop and maintain PL/SQL 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 root-cause 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 hands-on experience in Mainframe technologies: COBOL, JCL, VSAM, DB2.
• Solid expertise in Unix/Linux Shell Scripting.
• Strong SQL and PL/SQL skills (procedures, functions, triggers, packages).
• Experience integrating shell scripts with relational databases.
• Strong debugging, analytical, and problem-solving 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, CI/CD pipelines, or DevOps practices.
• Knowledge of Python or Java for extended automation or backend integrations.
• Additional mainframe skills such as:
o COBOL, PL/I, Assembler, C/C++
o CICS, IMS, and system administration on DB2/CICS/IMS
o REXX scripting for automation and migration tasks
• Strong troubleshooting skills for IBM mainframe product-related issues.

The base compensation range for this role in the posted location is : $70000 to $85000 

Capgemini provides compensation range information in accordance with applicable national, state, provincial, and local pay transparency laws. The base compensation range listed for this position reflects the minimum and maximum target compensation Capgemini, in good faith, believes it may pay for the role at the time of this posting. This range may be subject to change as permitted by law.

The actual compensation offered to any candidate may fall outside of the posted range and will be determined based on multiple factors legally permitted in the applicable jurisdiction.

These may include, but are not limited to: Geographic location, Education and qualifications, Certifications a