Ganesh

Software Engineer with 1 year 8 months of experience in SQL, PL/SQL, and ERP application development, transitioning into Data Engineering. Hands-on experience building an end-to-end PySpark ETL pipeline with JDBC extraction, multi-stage data quality validation, business transformations, and multi-format loading (MySQL, CSV, Parquet), orchestrated with Apache Airflow and fully containerized with Docker. Strong SQL/PL-SQL foundation from production data migration and validation work, with working knowledge of data warehousing and data lake concepts; comfortable across the Python and Java ecosystems.

Programmer Analyst at Cognizant (2024-Dec – Present)

• Developed and maintained BI Publisher (BIP) reports using SQL to support business reporting requirements.
• Performed data migration and validation across systems using PL/SQL, writing procedures and scripts to ensure data accuracy and integrity between source and target.
• Wrote and optimized complex SQL queries for extracting and reconciling data during migration cycles, improving query execution time by up to 30% and reducing turnaround time for high-volume BIP reports.
• Rewrote slow-running queries using CTEs, window functions, and optimized subqueries in place of nested loops and repeated table scans, cutting average query runtime by ~40% and reducing report load time from over 20 seconds to under 12 seconds on high-volume tables.
• Designed and built 5 web pages/app modules using Oracle APEX, covering forms, interactive reports, and business workflows.

B.Tech in Information Technology – Jeppiaar Engineering College (2024)