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Senior Mainframe Developer with 3+ years in PL/I, JCL, DB2 & Agile
Mainframe Developer with over 4 years of experience specializing in PL/I, JCL, DB2, IDMS, CICS, and Async Web Services. Currently working at Colruyt Group India, with a strong background in Agile methodologies, mainframe modernization, database migration, and system optimization. Skilled in designing, developing, and maintaining enterprise-level applications using IBM Developer for z/OS. Demonstrated success in enhancing performance, improving data accuracy, and ensuring reliability in retail and supply chain systems. • Develop and maintain mainframe-based business applications using PL/I, DB2, JCL, and IDMS. • Implement CICS transactions and Async Web Services to enhance interoperability and system performance. • Collaborate with Agile teams to deliver production-ready mainframe solutions aligned with business goals. • Worked on problem tickets and production incidents, performing root cause analysis and implementing permanent fixes to improve system stability. • Prepared detailed technical documentation for fixes and enhancements, ensuring smooth knowledge transfer and maintainability. • Contributed to decommissioning activities — analyzed the impact of retiring legacy components, identified dependencies, and safely removed unused modules. • Monitored batch cycles during and after production deployment to ensure smooth execution and verify successful job runs. • Actively contributed to key projects such as Direct Deliveries and Store Stock Applications, focusing on performance optimization, data accuracy, and seamless process integration.
Jawaharlal Nehru Technological University, Hyderabad (JNTUH)
Bachelor of Technology · Computer Science
August 1, 2018 – June 30, 2022
Colruyt Group India
Mainframe Developer
August 1, 2022 – Present
Hyderābād, Telangana, India
Direct Deliveries
May 15, 2026 – Present
Direct Deliveries is a process where articles are delivered directly from suppliers to retail stores, bypassing warehouses to streamline logistics and reduce lead time. Initially, there were five different data sources for direct delivery articles—some based on article and branch, others only on article and LSKU levels. The system was restructured into a single standardized source based on the article-branch level, simplifying data management and improving data integrity. Responsibilities: • Prepared detailed analysis documents across multiple development cycles to assess dependencies and plan optimized solutions. • Created low-level design (LLD) documents, developed programs, and conducted unit testing to validate changes. • Prepared detailed documentation for newly developed cycles, supporting future maintenance and enhancements. • Monitored execution cycles during and after production deployment to ensure all batch jobs executed successfully. • Validated data and results post-execution to confirm accuracy and compliance with new logic and business requirements. • Consolidated five different data sources into a single unified source, improving data consistency and integration. • Redesigned stock update logic to update only after order reception in stores, ensuring accurate, real-time inventory tracking. • Optimized PL/I and JCL batch jobs, improving performance and synchronization between ordering and stock systems.
Store Stock Applications
May 15, 2026 – Present
The Store Stock Applications project focused on optimizing and consolidating store-level inventory management systems to enhance performance, scalability, and maintainability. Initially, all store data was managed in the Oracle BRST schema; the project migrated all batch processes to the DB2 FISN schema, enabling smoother integration with mainframe systems. Responsibilities: • Migrated all batch jobs and data processes from Oracle BRST to DB2 FISN, improving database performance, scalability, and consistency. • Created low-level design (LLD) documents, developed mainframe programs, and conducted unit testing to ensure reliable functionality. • Prepared complete documentation for newly developed cycles to facilitate maintenance and audit readiness. • Replaced legacy IMSL services (Stock Management and Delivery Management) with Async Web Services, increasing efficiency and reducing dependencies. • Consolidated 11 store applications (counting, wastage, orders, returns, etc.) into 4 unified systems, simplifying workflows and reducing maintenance overhead. • Optimized batch workflows, reduced job runtime, and ensured synchronization between DB2 systems and downstream applications. • Improved overall system reliability and performance across retail store operations.
Cultural Fit Analysis
The candidate exhibits an excellent cultural fit for a Senior Mainframe Developer role, given their specialized and extensive experience within the mainframe ecosystem. Their background in system optimization, data integrity, and modernization aligns with the needs of organizations maintaining critical legacy systems while pursuing efficiency. Experience with Agile methodologies suggests an ability to integrate modern development practices into a traditional environment.
Soft Skills & Operational Fit
The candidate demonstrates strong operational fit through their experience in Agile teams, root cause analysis, and meticulous documentation. Soft skills include collaboration, problem-solving, attention to detail, and a proactive approach to system maintenance and decommissioning. Their focus on data validation and monitoring indicates a commitment to quality and system stability.