Ravikumar Teladala
Hyderabad
Summary
Detail-oriented ETL & Data QA Engineer with 4+ years of experience validating data pipelines, ETL/ELT processes, dashboards, and large-scale data transformations. Skilled in SQL, Pyapark, Databricks, Delta Lake, Data Lake validation, and Snowflake. Strong experience in ETL work flow validations, Data integrity,Data reconciliation,Data completeness,Migration testing, and cloud-based data storage and pipelines validation using ADF, ADLS, and Databricks notebooks.
Overview
4
4
years of professional experience
1
1
Certificate
2021
2021
years of post-secondary education
Work History
ETL&Data QA Tester
Tata Consultancy Services
Hyderabad
05.2022 - Current
- Performed end-to-end testing for data pipelines across source→staging→target layers.
- Conducted incremental & full load validation , historical data, and time stamps checking.
- Executed complex SQL queries for data reconciliation, Data integrity checks, and schema validation.
- Validated migration from on-prem SQL Server/Oracle to Azure Data bricks Delta Lake .
- Used Databricks Notebooks (SQL + Pyspark) for schema checks, partition validation, file-level verification.
- Validated Delta Lake tables: partitions and schema evolution.mandary columns, duplicates check .
- Tested ADF pipelines, ADLS folder structures, and ingestion logic.
- Worked with data engineers, reporting teams, product owners for data quality assurance.
- Executed functional, regression, and performance testing on various platforms.
- Automated validation using Tosca DB Expert, reducing manual effort by 60%.
- Used Python for Data comparison, schema comparison, automated profiling.
- Utilized automation tools to streamline testing procedures and improve accuracy.
- Utilized defect tracking tools such as JIRA for documenting test results and reporting issues found during testing cycles.
- Documented all phases of testing including results analysis and summary reports.
- Worked with Agile and Scrum methodologies to accomplish project milestones and meet demanding timelines.
- Recognized in 2024 & 2025 for outstanding performance and dedication to project success at TCS
Education
Bachelor of Technology - Mechanical Engineering
NBKR College of Engineering and Technology
Nellore, IndiaSkills
- ETL/ELT Testing
- Data Warehouse Testing
- Data Quality Validation
- Databricks
- ADLS
- Snowflake
- BI tool
- SQL
- Advanced Excel
- ETL processes
- Regression testing
- Test design
- Test execution
- PySpark scripting
- Tosca automation
- ADF
- Sanity testing
- Smoke testing
- End to end testing
- Integration testing
- Database testing
- Cloud migration testing
- UAT testing
- Functional testing
- SQL query execution
- ADF pipeline testing
- Data migration validation
- Automation scripting
- Agile methodologies
- Bug reporting
- Test plan development
- Load testing
- Defect tracking
- Data integrity testing
- Data reconciliation
- Data completeness
Certification
- Microsoft Certified: Azure Data Analyst Associate
- ETL Testing Professional Certification
- Tricentis Tosca Automation Specialist – Level 1 & 2
- ISTQB Certificate
Timeline
ETL&Data QA Tester
Tata Consultancy Services
05.2022 - Current
Bachelor of Technology - Mechanical Engineering
NBKR College of Engineering and Technology
Awards
- Outstanding Performance
- 2024
- 2025
- TCS
Projects
Medical claims project (Jun-2022 to Dec-2023) Performed end-to-end ETL testing across source, staging, and target layers to ensure data accuracy, integrity, completeness, Validated data transformations , aggregations using complex SQL queries., Conducted data quality checks, including null, duplicate, and referential integrity validation., Executed incremental load validation and collaborated with data engineers to resolve ETL failures., Documented test cases, execution results, and defects using JIRA, Supported data reconciliation and BI report validation to ensure business reporting accuracy, Participated in requirement walkthroughs and defect triage to improve data quality.
On-Prem to Cloud Migration Projects (Jan-2024 to Feb-2026) Validated ETL migration from on-prem SQL Server/Oracle to Databricks Delta Lake., Performed source-to-target data validation using SQL & PySpark (count comparisons minus/except)., Conducted schema, data type, completeness, and integrity checks across environments., Validated full and incremental loads, ensuring historical and delta data accuracy., Used Databricks Notebooks, Azure Data Factory (ADF), and ADLS to validate and monitor pipelines., Verified CDC logic and timestamp handling to ensure correct incremental data processing., Worked closely with engineering teams to identify data mismatches and optimize validation logic.
Awards
- Outstanding Performance
- 2024
- 2025
- TCS