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Nagarajan Thankavel

Nagarajan Thankavel

ETL Tester

Chennai, Tamil Nadu, India
80
Profile Score

About

ETL and Data Warehouse Testing professional with 7+ years of experience validating complex data pipelines and ensuring data integrity across financial, healthcare, and e-commerce platforms. Experienced in source-to-target validation, ETL testing, API data validation, and large-scale data migration using SQL, Python, and modern data platforms. Skilled in testing ETL pipelines built with Informatica, Talend, and SSIS across Snowflake, SQL Server, Oracle, and AWS environments. Proven ability to collaborate with distributed Agile teams and deliver reliable, high-quality data solutions. Open to global and remote opportunities.

Skills & Expertise (26)

ETL Testing Expert
9.1/10
8
Years Exp
Data Warehouse Testing Expert
8.9/10
8
Years Exp
SQL Expert
8.5/10
8
Years Exp
Python Intermediate
7.8/10
4
Years Exp
Informatica PowerCenter Advanced
7.4/10
5
Years Exp
Waterfall Scrum Agile Requirement Traceability Matrix Test Case Design Power BI Jira AWS Glue AWS Athena AWS S3 Snowflake SQL Server Oracle SSIS Talend UNIX Pandas Data Quality Validation Reconciliation Data Migration Source-to-Target Validation

Work Experience

ETL Tester

Entrust Software and IT Services

Jun 2018 - Present

Validated ETL data pipelines integrating trading systems, risk engines, settlement platforms, and regulatory reporting systems. Executed source-to-target data validation across Snowflake warehouse ensuring accuracy of financial transaction datasets. Designed and executed ETL test plans, test cases, and data validation scripts for large financial datasets. Performed Power BI report validation by reconciling dashboard data with Snowflake warehouse tables. Used SQL queries and Python (Pandas) to automate cross-system data validation and reconciliation. Identified and logged data transformation defects and integration issues in Jira with detailed SQL evidence. Collaborated with ETL developers, analysts, and stakeholders to resolve data discrepancies and pipeline failures.

System Administrator

Annsys Technologies

Jan 2013 - Apr 2018

Managed Windows and Linux servers, ensuring system availability and performance. Performed system monitoring, backups, and troubleshooting for enterprise applications. Supported network infrastructure and server maintenance activities. Assisted development teams with environment setup and deployment support.

Education

Bachelor of Engineering – Computational Science - PSN College of Engineering & Technology

2006 - · Afghanistan

Certifications

No certifications added yet

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Profile Score Breakdown

📷 Photo 10/10
📄 Resume 10/10
💼 Job Title 10/10
✍️ Bio 10/10
🛠️ Skills 20/20
🎓 Education 10/10
⏱️ Experience 5/15
💰 Rate 0/5
🏆 Certs 0/5
Verified 5/5
Total Score 80/100

Profile Overview

Member sinceMar 2026

Availability Details

Visa Status

Citizen

Relocation

Depends on Offer