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ETL Developer with 4+ years in Data Warehousing & BI Reporting
ETL Test Engineer with 4+ years of experience in Data Warehousing, ETL Testing, Database Testing, and BI Report Validation across enterprise-scale data platforms. Strong experience validating complex ETL pipelines built on Snowflake, SQL Server, and Oracle in large-scale data warehouse environments. Hands-on expertise in Snowflake SQL, ETL validation, data reconciliation, and Source-to-Target (S2T) testing. Proficient in Informatica IICS, SSIS, Python automation, and UNIX scripting for validating high-volume datasets and ensuring data accuracy across source and target systems. Experienced in validating cloud-based data warehouse environments, performing data quality checks, and verifying BI reports using Power BI and Tableau. Strong understanding of Agile/Scrum methodologies, SDLC, STLC, and defect lifecycle management using JIRA. 4.2+ Years of Relevant Experience in ETL Testing and Database Testing and BI-Report Testing with skillset of Oracle SQL, UNIX, SSIS, PYTHON, INFORMATICA (IICS) and ETL concepts. Well-versed with all stages of software Development life cycle (SDLC)and software Testing life cycle (STLC). Performed large-scale data reconciliation between source systems and Snowflake target tables. Strong experience in validating high-volume data in both source and target environments using complex SQL queries and ETL testing techniques. Collaborated effectively with cross-functional teams, including Data Engineering, BI, and QA, to ensure smooth sprint execution and deliver high-quality, error-free solutions. Worked with Power BI to create dashboards, analyze test data, and generate insights for reporting and decision-making different databases for verification process. Developed and executed complex SQL queries across multiple databases to validate data accuracy during the verification process and validate source-to-target data, ensuring completeness, correctness, and consistency. Applied Python for automating repetitive data validation tasks, improving test
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY
Master of Business Administration · HR & FINANCE
August 1, 2019 – June 30, 2021
S. V UNIVERSITY
Bachelor of Commerce · Computer Application's
August 1, 2016 – June 30, 2019
ILink Systems digital Solutions Pvt Ltd
ETL Tester
December 1, 2021 – Present
Chennai, Tamil Nadu, India
Datamanagers
June 1, 2025 – Present
Performed ETL validation in Snowflake data warehouse to ensure data accuracy across staging and reporting layers. Identified, reported, and tracked defects utilizing Jira. Prepared test cases, scripts, and comprehensive documentation. Conducted data validation and reconciliation procedures. Participated in build, smoke, sanity, and regression tests. Performed data reconciliation between source systems and Snowflake tables. Communicated defects to developers and used Jira for tracking. Held responsibility for developing test cases, plans, and data. Involved in End-to-End Testing validation. Performed database testing and data validation post-migration. Validated data pipelines loading into Snowflake reporting tables. Detected and classified bugs. Ensured system stability, data integrity, and data warehouse effectiveness through regression testing. Designed and executed test cases, identified data quality issues, validated transformations, and collaborated with developers for smooth data flow.
DATA MODELING CENTER
December 1, 2021 – December 18, 2024
Held responsibility for developing comprehensive test cases, test plans, and test data, while ensuring accurate coverage of requirements and business process. Involved in End-to-End Testing validation from source to target environments. Involved in database testing and data validation after the migration done & Validated data pipelines loading into Snowflake reporting tables. Detected bugs, classified based on the severity, Priority and documented them. This include ensuring the stability and functionality of the system through regression testing, validating the integrity and accuracy of data in the database and conducting through testing of the data warehouse of ensure its effectiveness and reliability. Involved designing and executing test cases, identifying data quality issues, validating transformations, ensuring data accuracy, and collaborating with developers and product owner to ensure smooth data flow.
Cultural Fit Analysis
The candidate's experience across various databases (Oracle, SQL Server, Snowflake, MySQL/PostgreSQL) and ETL tools (Informatica, Talend, SSIS) suggests adaptability and a willingness to work with diverse technologies. Their involvement in end-to-end testing and collaboration with developers and product owners indicates a team-oriented mindset. The project descriptions, though somewhat repetitive, show a consistent focus on data integrity and quality, aligning with a detail-oriented culture.
Soft Skills & Operational Fit
The candidate demonstrates strong collaboration skills, working effectively with cross-functional teams (Data Engineering, BI, QA). They are adept at defect tracking and communication, which are crucial for operational efficiency. The detailed descriptions of test case development, documentation, and reconciliation procedures indicate a methodical and thorough approach to testing.