Auxilia Rayappan

I’m a Senior ETL Tester with over 8+ years of IT industry experience and 5+ years of specialized ETL testing. I translate business and technical requirements into accurate test cases and work efficiently across the Software Testing Life Cycle (STLC), including agile sprints and multiple project phases. At Persistent Systems and Pointel Technology & Solution, I’ve built and executed ETL test scripts using source-to-target mapping, environment mapping, and optimized SQL queries to ensure end-to-end data correctness.

My focus is rigorous data validation and quality: row count reconciliation, sample verification, column-level mapping accuracy, and end-to-end data reconciliation. I’ve driven functional and system integration testing, maintained defect documentation (logging, prioritization, tracking, and reporting), and supported defect resolution with development teams. I’m hands-on with modern ETL and data platforms like AWS Redshift, Snowflake, BigQuery, AWS Glue, AWS AppFlow, S3, and Apache Airflow—plus strong SQL and Python skills to detect and prevent ETL issues early.