Aravindhan P S

Chennai | +91 7418260517

Professional Summary

Results-driven Mainframe Developer with 8 years of experience in the IT industry, specializing in COBOL,
JCL, DFSORT, and DB2. Proven ability to optimize job flows, enhance system efficiency, and drive
automation to reduce manual effort and operational costs. Adept at troubleshooting, improving client
satisfaction, and delivering reliable mainframe solutions that align with business

Skills

Technical Skills: COBOL, JCL, DB2, CICS, VSAM, SQL, Batch & Online Processing, Python (Basic
Programming)
Functional Skills: Requirement Analysis, Debugging, Production Support, Issue Resolution, Client
Coordination, Agile methodology, Cloud Cost Optimization.
Tools: IBM z/OS, IBM Utilities, TSO/ISPF, File-AID, SPUFI, CA7, Control-M, Db2 Tools (QMF),
FTP/SFTP(MFT), ServiceNow, JIRA.

Experience

Walmart Global Technologies, August 2021 – Present

 Designed, developed, and maintained JCL & COBOL-based batch jobs for applications, ensuring
alignment with business needs while optimizing job performance.
 Developed and fine-tuned DB2 SQL queries to improve database performance and minimize
execution time.
 Led mainframe integration efforts for onboarding new markets, collaborating with business
analysts to gather requirements and develop tailored solutions. This initiative streamlined processes,
enabling faster user onboarding.
 Identified and decommissioned redundant jobs, streamlining workflows and reducing unnecessary
processing. This optimization led to a 10% reduction in redundant workload, improving efficiency
of the team.
 Decommissioned ~40 obsolete mainframe jobs in collaboration with cross-functional teams,
ensuring a seamless transition. This initiative reduced manual monitoring, streamlined job
maintenance, and saved ~$7K annually.
 Processed closely with clients to establish specifications and system designs. Actively participated
with the team to discuss technical or design ideas during project development process.
 Executed a database reindexing initiative for clustered and non-clustered indexes by creating and
triggering python script in Airflow which resulted in freeing ~1.2 TB of storage. This optimization
enhanced database performance, improved application stability.
 Conducted cloud cost optimization for production and non-production environments by analyzing
server capacity and utilization, collaborating with the OneOps team to rightsize resources. This one-
time initiative achieved ~$5K in annual savings.
Infosys Private Ltd., March 2017 – August 2021
Technology Analyst Chennai, India

 Developed and enhanced JCL, COBOL programs according to business needs for legacy applications
and optimized the performance of jobs.
 Spotted and modified the Batch Jobs by increasing the dataset space accurately which resolved 20
% manual billing effort for the client.
 Accountable for identifying and modifying Batch jobs which pointed to Tumbleweed FTP connection
to MFT server SFTP connection for file transfer to and from Mainframe server.
 Collaborated with client teams across multiple time zones, leading meetings and brainstorming
sessions to successfully complete the FTP migration before the decommissioning of the old FTP
Tumbleweed server, earning client’s recognition.
 Renowned for resolving 30 critical tickets after a major release which helped us to showcase
ourselves in a good position to the client and made the release successful.
 Monitored jobs when implemented on production and made myself available for Production support
activities.
 Managed all facets of project SDLC lifecycle in Agile Methodology, including design, development,
testing, deployment, and Operations.
 Explored Job flow in Production and pitched in to resolve production ABENDs for issues that need
rapid turnover avoiding needless escalation.
 Acquired foundational knowledge in CICS during training, covering transaction processing,
pseudo-conversational programming, VSAM file handling, and COBOL-CICS-DB2 integration.
Developed and tested basic CICS screens and programs as part of a retail platform development
project.
 Gained hands-on exposure to MAPSET, BMS, and inter-transaction communication, applying
CICS concepts to design and simulate online transactions in a structured training environment.
 Performed Root cause analysis to discover the cause of issues in the Test/Production environment
by the team during SIT, UAT & implementation.
 Walked clients and internal staff through troubleshooting steps to resolve business issues.

Education

 Bachelor of Engineering - Electrical Engineering/ Saranathan College of Engg., May 2016

 12th - HSC / S.V.V Higher Secondary School, May 2012

 10th - SSLC / R.S.K Higher Secondary School, March 2010