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Senior Mainframe Developer with 5+ years in COBOL & JCL
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Mainframe Developer with 5+ years of experience in COBOL, JCL, VSAM, NDM and DB2, specializing in banking batch processing and data validation. Played a key role in Citi Divestiture, validating customer, account, and transaction data for migration to buyer banks, as well as archival of non-transferred data into Solix. Experienced in secure file transfers, batch job monitoring, abend resolution, audit support, and cutover operations. Recognized for ensuring data integrity, regulatory compliance, and zero data loss in high-volume financial systems, with a strong focus on delivering robust, production-ready solutions.
Netaji Subhash Engineering College
Bachelor of Technology
August 1, 2016 – June 30, 2020
Arambagh Girls High School
Higher Secondary Certificate (12th Grade)
June 1, 2015 – May 31, 2015
Paschim Ghoshpur R K Bidyapith
Secondary Certificate (10th Grade)
June 1, 2013 – May 31, 2013
Tata Consultancy Services
Mainframe Developer
March 1, 2021 – Present
Kolkata, West Bengal, India
Citi Divestiture – Account Separation, Migration & Archival
March 1, 2021 – Present
Played a dual role as Mainframe Developer and Tester, responsible for both development activities and validation. Developed and executed JCL batch jobs to extract, validate, and reconcile customer, account, and transaction data. Performed extensive file-to-file data validation using COBOL programs and SORT utilities to ensure data accuracy prior to migration. Identified, tracked, and resolved defects using JIRA, performing development fixes and validation while collaborating with respective application teams. Validated data eligible for transfer to buyer banks as part of Citi Divestiture, ensuring completeness and correctness. Validated archival data not transferred to buyer banks, ensuring correct segregation and compliance before archiving into Solix as per retention policies. Handled NDM (Connect: Direct) activities for secure file transfers and validated successful transmissions during migration cycles. Analyzed batch job failures, supported reruns and restarts, and ensured SLA adherence during cutover and Go-Live phases. Supported UAT, Go-Live, and audit activities by providing validation reports, reconciliation summaries, and defect closure evidence.
Cultural Fit Analysis
The candidate's extensive experience in a high-risk banking environment at Tata Consultancy Services, coupled with a strong focus on data integrity, regulatory compliance, and strict SLA adherence, indicates an excellent cultural fit for structured, process-driven organizations, especially within the financial sector. Their ability to manage defect lifecycles, support audits, and collaborate across various teams aligns well with enterprise-level development and operational demands.
Soft Skills & Operational Fit
The candidate demonstrates strong ownership, reliability, and attention to detail, particularly in high-risk banking environments. They exhibit effective collaboration skills, working with business, QA, and application teams. Their experience in managing defect lifecycles, supporting audits, and adhering to strict SLAs highlights a process-oriented and responsible approach to critical operations.