Job Title: Mainframe Developer – CICS / z/OS
Location: London, UK (Hybrid)
Experience: 5+ Years
Employment Type: Contract
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 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 practices
Required 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 management