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