Pavani Challa

About Pavani Challa

Having 7+ Years of IT experience with primary focus on cobol Application Development, Maintenance & Production Support. Projects in IBM Mainframe environment and exposure to Waterfall methodologies and Agile methodologies Strong hands-on experience on COBOL, JCL, VSAM, Easy rive, IMS DB/DC, DB2, CICS, EDI 837, SQL & FTP Process. Expertise in using mainframe tools such as XPEDITER, CHANGEMAN, SYNCSORT, DFSORT, Endeavor, File-Aid, File Manager, SPUFI, QMF, CA-7 And Healthcare providers use software to create and submit EDI 837 claims. Proven expertise in multiple flavors of coding based on Mainframe Stored Procedures, Triggers, Functions, Cursors, Packages, SQL Query Profiling and data base remodeling for performance.High degree of experience in identifying and solving technical problems related to JCL, COBOL, DB2, VSAM and CICS Led migration efforts for CI/CD pipelines from on-premises to AWS, achieving reduction in build and deployment times Designed and implemented CI/CD pipelines using AWS Code Pipeline, Code Build, and Jenkins, reducing deployment times by X% and increasing release frequency from monthly to weekly Automated infrastructure provisioning using Terraform and Cloud Formation to ensure consistent and reproducible environments for staging, testing, and production

Experience

1. Mainframe Developer

   Fannie Mae

   Oct 2025 — Present · Reston, VA, US

   Developed and maintained complex CA-IDMS COBOL batch programs to extract data using multi-level OWNER–MEMBER relationships. Designed, developed, and maintained COBOL batch applications using CA-IDMS, handling complex OWNER–MEMBER relationships, DBKEY propagation, and high-volume data processing. Built and supported large-scale data extraction and reporting solutions, generating variable-length (LINE SEQUENTIAL) output files for downstream consumption. Diagnosed and resolved critical production abends (SB37, S0C7, S0C4) through record-layout redesign, file definition corrections, and optimized MOVE/WRITE logic. Developed and maintained JCL, including FLX jobs, to automate secure mainframe-to-AWS S3 data transfers as part of cloud modernization initiatives. Collaborated with cross-functional teams to validate data accuracy, reconcile record counts, and ensure compliance with business and regulatory requirements. Automated mainframe-to-cloud data delivery using FLX JCL to AWS S3, ensuring accurate, complete data transfer for downstream reporting, analytics, and modernization initiatives. Utilized XPEDITER, FILE-AID, ISPF, and SDSF for debugging, testing, and operational support. Followed SDLC and change management processes using Endevor/Changeman, ensuring stable and compliant deployments.

Education

• Trine University

  Masters , Information Science/Studies