LocationLondon, United Kingdom# Mainframe Developer – CICS / z/OS at N Consulting LtdLocationLondon, United KingdomSalary£300 - £350 /dayJob TypeContractDate PostedApril 30th, 2026Apply Now**Job Description**Infosys is seeking an experienced **Mainframe Developer** with strong expertise in **IBM Mainframe technologies**, including **CICS, z/OS, COBOL, JCL, DB2, IMS, and VSAM**, to support enterprise-critical banking and financial applications. The candidate will work on development, enhancement, maintenance, and modernization of legacy mainframe systems while ensuring system stability, scalability, and performance.**Key Responsibilities*** Develop, maintain, and enhance applications on **IBM z/OS** platform* Design and code programs using **COBOL, JCL, CICS, DB2, IMS, and VSAM*** Support both **online (CICS)** and batch processing environments* Perform debugging, root cause analysis, and resolution of production issues/abends* Optimize SQL queries and DB2 performance tuning* Work with ...