We are hiring a Mainframe Developer with strong batch processing experience for Capital One (CTS).Location: Chicago, IL (Hybrid 3 days onsite).Develop and maintain batch applications using COBOL, JCL, DB2, and VSAM.Design, execute, and optimize high-volume batch processing workflows.Handle job scheduling and automation using tools like Control-M or CA7.Troubleshoot batch failures, performance issues, and data inconsistencies.Work closely with business analysts and QA teams to deliver reliable so