Ramasamy Karuppiah
Senior Mainframe Developer | COBOL | DB2 | JCL | CICS | Natural | ADABAS | 14+ Years
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About
Senior Mainframe Developer with 14+ years of experience in designing, developing, enhancing and modernizing enterprise mainframe applications. Expertise in COBOL, DB2, JCL, CICS, Natural 4GL, ADABAS, EntireX, PREDICT, PEEK and N2O. Experienced in banking, finance and automotive domains with strong knowledge of batch and online processing, DB2 SQL optimization, SDLC, Agile and Waterfall.
Experience
Senior Mainframe Developer - Aame Flex Solutions - Netherlands (Remote)
(2024-09 - 2025-03)
Client: Erste Bank, Austria. Project Name: Flexcore PK – Modernization. Technologies: COBOL, DB2, JCL, CICS, Natural 4GL, ADABAS, EntireX
- Developed and enhanced enterprise mainframe applications using COBOL, DB2, JCL and CICS.
- Designed and modified COBOL programs and DB2 SQL modules based on business requirements.
- Developed and maintained JCL for batch processing.
- Worked on CICS online transaction programs and application enhancements.
- Optimized DB2 SQL queries and improved application performance.
- Participated in technical design, code reviews, unit testing and Agile development.
Assistant Consultant - Tata Consultancy Services - Bangalore
(2019-03 - 2024-08)
Clients: Nordea Bank, Denmark; Commonwealth Bank of Australia. Technologies: COBOL, DB2, JCL, CICS, Natural 4GL, ADABAS, EntireX
- Developed and enhanced enterprise mainframe applications using COBOL, DB2, JCL and CICS.
- Designed and modified COBOL programs and DB2 SQL modules based on business requirements.
- Developed and maintained JCL for batch processing.
- Worked on CICS online transaction programs and application enhancements.
- Optimized DB2 SQL queries and improved application performance.
- Participated in technical design, code reviews, unit testing and Agile development.
Technical Team Lead - LTI (Larsen & Toubro Infotech) - Pune
(2018-04 - 2019-03)
Client: Nordea Bank, Denmark (Liv & Pension). Technologies: COBOL, DB2, JCL, CICS, Natural 4GL, ADABAS, EntireX
- Developed and enhanced enterprise mainframe applications using COBOL, DB2, JCL and CICS.
- Designed and modified COBOL programs and DB2 SQL modules based on business requirements.
- Developed and maintained JCL for batch processing.
- Worked on CICS online transaction programs and application enhancements.
- Optimized DB2 SQL queries and improved application performance.
- Participated in technical design, code reviews, unit testing and Agile development.
Senior Mainframe Developer - Tech Mahindra - Chennai
(2010-12 - 2018-04)
Client: Nissan Motors International, United Kingdom (Onsite: 2016–2017). Technologies: COBOL, DB2, JCL, CICS, Natural 4GL, ADABAS, EntireX
- Developed and enhanced enterprise mainframe applications using COBOL, DB2, JCL and CICS.
- Designed and modified COBOL programs and DB2 SQL modules based on business requirements.
- Developed and maintained JCL for batch processing.
- Worked on CICS online transaction programs and application enhancements.
- Optimized DB2 SQL queries and improved application performance.
- Participated in technical design, code reviews, unit testing and Agile development.
Career Break
(2025-03)
Took a planned career break due to personal commitments. Available for immediate joining and actively seeking Senior Mainframe Developer opportunities.
Education
Bachelor of Engineering - Computer Science - Anna University, Chennai
