Summary
Overview
Work History
Education
Skills
Certification
CAREER OBJECTIVE
Work Availability
Languages
Timeline
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ABHISHEK DAS

ABHISHEK DAS

Mainframe Developer
Pune,MH

Summary

Mainframe Developer with 4.5 years of experience across banking, payments, and healthcare domains at TSYS (a Global Payments company) and Infosys. Proficient in JCL, COBOL, DB2, IMS, VSAM, Endevor and CICS with proven expertise in MIPS optimization, performance tuning, production support and batch processing. Adept at unit testing, defect resolution and documentation. Experienced in Credit Card Issuer processing systems and collaborating with cross-regional teams (US, APAC, Europe) under Agile methodology. Open to up-skilling in modernization technologies.

Overview

5
5
years of professional experience
3
3
Certifications

Work History

Software Engineer – Issuing Core (India)

TSYS Card Tech Services India LLP (Global Payments)
03.2024 - Current
  • Worked in the Environment, Security and Maintenance (ESM) team on TS1 and TS2 card processing platforms (consumer & commercial portfolios) for global banks and financial institutions.
  • Delivered MIPS savings by optimizing JCLs, COBOL programs, procs and parms contributing to measurable CPU and cost savings for the organization.
  • Executed unit testing and validations ensuring functional accuracy across transaction workflows and improving data accuracy.
  • Handled RMS transmission setups, billing, IRX/MRX requests, CSZ entries, client de-installs, and 3PS validations, directly contributing to setup cost generation and revenue realization for bank clients.
  • Provided on-call production support and abend resolution, minimizing downtime.
  • Supported Disaster Recovery (DR) activities, ensuring resilience of critical banking and payment systems.
  • Documented enhancements and BAU processes to improve knowledge sharing, reducing dependency and increasing efficiency.
  • Collaborated with international teams to deliver high-priority enhancements under tight deadlines.

Senior Systems Engineer / Systems Engineer – Mainframe Developer

Infosys Ltd.
04.2021 - 02.2024
  • Developed and maintained COBOL-JCL-DB2 applications for leading healthcare and financial services clients.
  • Optimized application performance, reducing CPU usage and contributing to measurable MIPS savings.
  • Resolved production abends and defects, improving system reliability and minimizing downtime.
  • Designed, tested and deployed mainframe applications under Agile methodology while ensuring compliance with regulatory standards.
  • Collaborated with senior developers, business analysts and cross-regional client teams to deliver efficient solutions.

Education

B.Tech - Civil Engineering

Haldia Institute of Technology
Haldia, India
04.2001 -

Std. XII - CBSE

Kendriya Vidyalaya
CTPS
03-2016

Std. X - ICSE

De Nobili School
CTPS
04-2014

Skills

Mainframe Development and tools: JCL, COBOL, DB2, Endevor, CA7, CICS (basic), IMS (basic)

Certification

Mainframe Modernization Training – Infosys Foundation Program, Mysore consisting of trainings in JCL, DB2, COBOL, Endevor, z/OS, CICS (basic), IMS (basic)

CAREER OBJECTIVE

To advance my career as a Mainframe Developer/MIPS Optimization Engineer, contributing to enterprise-level financial and payments projects. Leverage expertise in JCL, COBOL, DB2 and performance tuning while expanding and exploring into modernization technologies to deliver scalable, efficient, and business-critical solutions.

Work Availability

monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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Languages

English
Bilingual or Proficient (C2)
Hindi
Bilingual or Proficient (C2)
Bengali
Bilingual or Proficient (C2)

Timeline

Software Engineer – Issuing Core (India)

TSYS Card Tech Services India LLP (Global Payments)
03.2024 - Current

Senior Systems Engineer / Systems Engineer – Mainframe Developer

Infosys Ltd.
04.2021 - 02.2024

B.Tech - Civil Engineering

Haldia Institute of Technology
04.2001 -

Std. XII - CBSE

Kendriya Vidyalaya

Std. X - ICSE

De Nobili School

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ABHISHEK DASMainframe Developer