Mainframe Developer - CICS / z/OS

LocationLondon, United Kingdom# Mainframe Developer - CICS / z/OS at N Consulting LtdLocationLondon, United KingdomSalary£300 - £350 /dayJob TypeContractDate PostedApril 30th, 2026Apply NowJob DescriptionInfosys 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 schedulers such as Control-M / CA7 / TWS* Participate in application modernization initiatives including API enablement and cloud integration* Collaborate with business analysts, testers, architects, and offshore teams* Follow Agile/Scrum methodology and CI/CD practicesRequired Skills* Strong hands-on experience with: + IBM Mainframe / z/OS + CICS Transaction Server + COBOL, JCL + DB2 / IMS + VSAM + MQ Series* Experience with tools: + Endevor / ChangeMan + File-AID + Expeditor / Xpediter + Abend-AID + SDSF / SPUFI / QMF* Strong troubleshooting and performance tuning skills* Experience in production support and incident managementJob Title: Mainframe Developer - CICS / z/OS Location: London, UK (Hybrid) Experience: 5+ Years Employment Type: Contract

schedulers such as Control-M / CA7 / TWS* Participate in application modernization initiatives including API enablement and cloud integration* Collaborate with business analysts, testers, architects, and offshore teams* Follow Agile/Scrum methodology and CI/CD practicesRequired Skills* Strong hands-on experience with: + IBM Mainframe / z/OS + CICS Transaction Server + COBOL, JCL + DB2 / IMS + VSAM + MQ Series* Experience with tools: + Endevor / ChangeMan + File-AID + Expeditor / Xpediter + Abend-AID + SDSF / SPUFI / QMF* Strong troubleshooting and performance tuning skills* Experience in production support and incident managementJob Title: Mainframe Developer - CICS / z/OS Location: London, UK (Hybrid) Experience: 5+ Years Employment Type: Contract #J-18808-Ljbffr