07/19/2026 updated
100 % available
Mainframe Developer with Application Support Background
warangal, India
Only remote
B.Tech in Electrical & Electronics EngineeringAbout me
Mainframe Support Eng (4+ yrs exp) specializing in JCL, COBOL, IMS DB, Easytrieve, TWS & CA7. Expert in batch optimization, automation & incident management for high-stakes enterprise systems. Available for remote US batch monitoring & development tasks. Ready to work via secure VPN/VDI.
IBM OS/2 (Software)IBM System IIBM BladeCustomer Information Control System (CICS)COBOL (Programming Language)IBM DB2DB2 SQLIBM SoftwareIBM IJob Control Language (JCL)IBM MainframeIBM Rational SoftwareIBM Rational Application DeveloperIBM StorageIBM System Z
COBOL & JCL Development
Expertise in writing, analyzing, and enhancing COBOL programs and JCL scripts for enterprise IBM z/OS banking applications, including business logic changes, defect fixes, and batch processing optimization.
DB2 & IMS Database Management
Hands-on experience with DB2 and IMS DB for data analysis, validation, and issue investigation within mainframe environments supporting Corporate Finance and Annuities systems.
CICS Transaction Processing
Practical exposure to CICS for transaction processing within IBM Mainframe environments, supporting reliable application delivery in regulated banking contexts.
IBM z/OS Mainframe Environment
Solid understanding of IBM z/OS, ISPF, and SDSF as core mainframe operating environments for development, testing, and deployment activities.
Endevor & Expediter Tools
Proficiency in using Endevor for code migrations and deployments following change management procedures, and Expediter for debugging programs and resolving data and logic-related issues.
Mainframe Utilities
Working knowledge of mainframe utilities including IDCAMS, SORT, IEBGENER, File-Aid, SPUFI, and Platinum for data handling and processing tasks.
Unit Testing & Batch Validation
Experience in performing unit testing and batch validation to ensure correctness of code changes and reduce rework before production releases.
Easytrieve
Familiarity with Easytrieve as a mainframe programming language used for data reporting and file processing tasks.
Application Modernization with IBM Z
Certified in Application Modernization with IBM Z and IBM Z Xplore Concepts, demonstrating continuous learning in mainframe modernization practices.
Expertise in writing, analyzing, and enhancing COBOL programs and JCL scripts for enterprise IBM z/OS banking applications, including business logic changes, defect fixes, and batch processing optimization.
DB2 & IMS Database Management
Hands-on experience with DB2 and IMS DB for data analysis, validation, and issue investigation within mainframe environments supporting Corporate Finance and Annuities systems.
CICS Transaction Processing
Practical exposure to CICS for transaction processing within IBM Mainframe environments, supporting reliable application delivery in regulated banking contexts.
IBM z/OS Mainframe Environment
Solid understanding of IBM z/OS, ISPF, and SDSF as core mainframe operating environments for development, testing, and deployment activities.
Endevor & Expediter Tools
Proficiency in using Endevor for code migrations and deployments following change management procedures, and Expediter for debugging programs and resolving data and logic-related issues.
Mainframe Utilities
Working knowledge of mainframe utilities including IDCAMS, SORT, IEBGENER, File-Aid, SPUFI, and Platinum for data handling and processing tasks.
Unit Testing & Batch Validation
Experience in performing unit testing and batch validation to ensure correctness of code changes and reduce rework before production releases.
Easytrieve
Familiarity with Easytrieve as a mainframe programming language used for data reporting and file processing tasks.
Application Modernization with IBM Z
Certified in Application Modernization with IBM Z and IBM Z Xplore Concepts, demonstrating continuous learning in mainframe modernization practices.
Experience
Professional experience0 - 5 years
Freelancer since2025
Languages
EnglishFluent
Project history
Worked on application development and enhancement for Corporate Finance and Annuities systems on IBM Mainframe (z/OS). Analyzed existing COBOL programs and JCL to understand application flow and business logic. Implemented business logic changes and defect fixes in COBOL programs based on functional requirements. Modified and optimized JCL and batch logic to support application changes and improve processing accuracy. Performed unit testing and batch validation to ensure correctness of code changes. Debugged programs using Expediter and resolved data and logic-related issues. Used DB2 and IMS for data analysis, validation, and issue investigation. Supported code migrations and deployments using Endevor, following change management procedures. Assisted in UAT and post-deployment validation to ensure stable application behavior. Collaborated with functional teams, testers, and production support teams during development and release cycles. Maintained technical documentation related to program changes and batch processes.