Summary
Overview
Work History
Education
Skills
Timeline
Generic

Devendra Chintala

Phoenix,AZ

Summary

Results-driven Senior Mainframe Developer and Tech Lead with 8+ years of experience delivering enterprise-scale mainframe solutions across Insurance, Banking, Telecom, and Automobile domains. Proficient in COBOL, JCL, DB2, VSAM, CICS, and ASSEMBLER, with hands-on expertise across the full SDLC using Agile and Waterfall methodologies. Proven ability to lead offshore teams, coordinate onsite-offshore delivery models, and collaborate with cross-functional stakeholders including Business Analysts, DBAs, and Product Owners to drive successful project outcomes

Overview

8
8
years of professional experience

Work History

Mainframe Developer

Mercedez Benz
04.2021 - Current
  • Led program governance and technical delivery for enterprise mainframe-to-Salesforce conversion across multiple Mercedes‑Benz business units.
  • Conducted comprehensive discovery of DB2, VSAM, IMS and flat-file sources; documented table/field definitions and usage patterns.
  • Parsed and standardized COBOL copybooks, identifying packed/comp-3 fields and custom data encodings.
  • Produced detailed source-to-target mapping artifacts, transformation rules, and field-level business logic matrices.
  • Architected and implemented Informatica IICS data pipelines for extraction, transformation, and error handling with high throughput.
  • Designed SQL Server staging schemas optimized for reconciliation and batch processing; implemented partitioning and indexing strategies.
  • Developed complex T-SQL stored procedures and SSIS packages for cleansing, deduplication, and dedupe-match scoring.
  • Built Python-based utilities to parse copybooks, convert packed numeric formats, compute checksums, and automate validation.
  • Implemented incremental CDC strategies and delta detection to minimize load windows and ensure data consistency.
  • Coordinated Salesforce loads using Informatica Salesforce Connector and Bulk API with parallel batching and retry logic.
  • Created automated reconciliation reports and dashboards comparing source vs target counts, values, and checksum mismatches.

Mainframe Developer

IBM
04.2019 - 05.2020
  • Designed and developed COBOL/JCL programs for batch and online processing, reducing job execution time by 30% through code optimization and efficient file handling techniques.
  • Developed and maintained DB2 stored procedures and SQL queries for large-scale banking applications, ensuring data integrity and improving query performance by 25%.
  • Built and enhanced CICS online transaction programs to support real-time customer-facing applications, handling over 10,000 daily transactions with 99.9% uptime.
  • Collaborated with cross-functional teams to migrate legacy COBOL applications to modernized mainframe architecture, ensuring zero data loss and minimal downtime during cutover.
  • Designed JCL job streams and automation scripts using REXX to streamline batch processing workflows, reducing manual intervention and scheduling errors by 40%.
  • Performed DB2 database tuning and query optimization, analyzing execution plans and implementing indexing strategies that reduced query response time by 35%.
  • Supported end-to-end SDLC including requirements analysis, technical design, unit testing, UAT support, and production deployments for 10+ mainframe projects annually.
  • Integrated mainframe applications with distributed systems using IBM MQ Series, enabling seamless real-time data exchange between z/OS and Java-based microservices.
  • Diagnosed and resolved critical production incidents involving ABEND codes, DB2 deadlocks, and JCL failures, maintaining SLA compliance with average resolution time under 2 hours.
  • Maintained and enhanced VSAM and GDG file structures for high-volume data processing pipelines, supporting daily batch cycles processing over 5 million records in financial systems.

Mainframe Developer

Truven
08.2018 - 03.2019
  • Developed and maintained COBOL applications on IBM Mainframe to process large volumes of healthcare data, claims, and reporting workloads, ensuring accuracy and reliability across critical business functions.
  • Designed and implemented JCL batch jobs and processing cycles for eligibility processing, billing runs, and healthcare compliance reporting, streamlining end-to-end batch operations.
  • Built and managed DB2 databases and VSAM file structures to support high-volume healthcare data processing, maintaining data integrity and accuracy across all transactional and reporting workloads.
  • Provided production support by diagnosing and resolving COBOL program defects, batch ABENDs, and online transaction issues, reducing system downtime and improving overall stability.
  • Collaborated with business analysts and QA teams to translate complex healthcare business requirements into scalable and reliable mainframe solutions, ensuring alignment with functional specifications.
  • Contributed to application enhancements and modernization initiatives, upgrading legacy mainframe systems while maintaining compliance with healthcare regulations including HIPAA.
  • Optimized batch processing cycles for eligibility and billing workloads, improving job throughput and reducing processing time across high-priority healthcare operations.
  • Ensured data integrity and consistency across DB2 and VSAM structures by implementing validation routines and error-handling logic within COBOL programs for healthcare claims processing.
  • Supported healthcare compliance reporting by developing and maintaining batch jobs that generated accurate, audit-ready reports aligned with regulatory and business requirements.
  • Participated in end-to-end SDLC activities including requirements gathering, design, coding, testing, and deployment for mainframe enhancements within a healthcare domain environment.

Education

Master of Science - Information Technology & Management

Concordia University
St.Paul MN
07-2022

Bachelor of Science - E.E.E

RVR & JC COLLEGE
ANDHRA PRADESH
06-2018

Skills

  • CICS, COBOL, Db2, Endover, Fileaid, IBM Mainframe, IBM Query Management Facility (QMF), IBM SPUFI, IBM Utilities, Job Analysis, Job Control Language (JCL), Mainframe, Mainframe Developer, Software System Analysis, Sort, VSAM, Xpediter, Agile & Waterfall Methodologies,Datacom and DB, Natural and ADABAS, COBOL programming, JCL expertise

Timeline

Mainframe Developer

Mercedez Benz
04.2021 - Current

Mainframe Developer

IBM
04.2019 - 05.2020

Mainframe Developer

Truven
08.2018 - 03.2019

Master of Science - Information Technology & Management

Concordia University

Bachelor of Science - E.E.E

RVR & JC COLLEGE

Similar Profiles

CREATE PROFILE