DBT/Snowflake Engineer

NTT DATA, Inc.; Chennai District; On-site; INR 800,000 - 1,200,000; Full time

Job summary

NTT DATA in Chennai, Tamil Nadu is seeking a DBT/Snowflake Engineer to join our data validation and migration team. You will validate data mapping, run complex SQL validations, and test Databricks notebooks to ensure accurate transformations during migration.

The role requires 2-4 years in Software Testing with 2+ years in Data Warehouse/ETL, and hands-on experience with Snowflake, Databricks, and dbt. Collaboration with onshore/offshore teams is essential.

Qualifications

• 2-4 years of Software Testing / QA, with at least 2+ years in Data Warehouse / ETL testing.
• Practical experience in data migration / data platform modernization projects is strongly preferred.
• Strong SQL skills for complex queries and validations.

Responsibilities

• Source (Yellowbricks / Informatica outputs) vs Target (Databricks / Snowflake / dbt outputs).
• Perform row-count checks between source and target tables.
• Sample and cell-level comparisons for critical entities and fields.
• Log discrepancies, analyze patterns, and support root-cause analysis with developers.
• Understand Informatica mappings and workflows and their outputs.
• Test Databricks notebooks/jobs to validate transformations, joins, filters, and aggregations.
• Validate CDC / incremental loads; ensure correct handling of new/changed/deleted records.
• Execute functional tests post-migration to verify business rule application.
• Perform regression testing for migration waves; ensure previously validated data/flows remain correct.
• Support integration testing across layers and downstream outputs.
• Assist in basic performance tests for key queries and jobs; monitor job failures and data volume anomalies.
• Log defects with steps, data samples, and evidence in defect tracking tools.
• Retest resolved defects and support regression runs.
• Maintain test case repositories, test data sets, and execution logs.
• Participate in daily stand-ups / defect triage with onshore/offshore teams.

Skills

SQL

Snowflake

Databricks

Informatica

dbt

Test management tools

Excel

Tools

Snowflake

Databricks

Informatica

dbt

Azure DevOps

JIRA

TestRail

qTest

Job description

We are currently seeking a DBT/Snowflake Engineer to join our team in Chennai, Tamil Nādu (IN-TN), India (IN).

Job Duties: Roles & Responsibilities

• Source (Yellowbricks / Informatica outputs) vs Target (Databricks / Snowflake / dbt outputs).
• Perform: Row-count checks between source and target tables.
• Sample and cell-level comparisons for critical entities and fields.
• Log discrepancies, analyze patterns, and work with developers to support root-cause analysis.
• Understand Informatica mappings and workflows and their expected outputs.
• Test Databricks notebooks/jobs that replicate Yellowbricks logic — ensuring correct transformations, joins, filters, and aggregations.
• Validate CDC / incremental loads: new, changed, and deleted records are handled correctly.
• Execute functional tests to verify correct application of business rules after migration.
• Perform regression testing for each migration wave to ensure that previously validated data and flows remain correct.
• Support integration testing across layers:
• Validate downstream outputs (if in scope): reports, extracts, or interfaces that consume migrated data.
• Assist in executing basic performance tests for key queries and jobs (e.g., comparing runtime vs baseline).
• Monitor pipeline runs for job failures, retries, and data volume anomalies.
• Execute test cases, record results, and maintain traceability to requirements.
• Log defects with clear steps, data samples, and evidence (screenshots/SQL) in the defect tracking tool (e.g., JIRA, Azure DevOps).
• Retest resolved defects and support regression runs.
• Maintain test case repositories, test data sets, and execution logs for audit and re-use.
• Participate in daily stand-ups / defect triage with onshore/offshore teams.

2-4 years of experience in Software Testing / QA, with at least 2+ years in Data Warehouse / ETL testing.

Practical experience in data migration / data platform modernization projects is strongly preferred.

Technical Skills

• Strong SQL skills for writing complex queries and validations (joins, aggregations, window functions, filters).
• Hands-on experience testing on at least one data platform such as: Snowflake, Databricks, or other cloud DW/Big Data platforms – experience with Snowflake/Databricks is a plus.
• Exposure to Informatica (understanding mappings/workflows and expected outputs).
• Exposure to dbt or willingness to learn dbt-based validations (model outputs, dbt test results).
• Good understanding of data warehouse concepts: facts/dimensions, SCDs, aggregations, grain, source-to-target mapping.
• Familiarity with test management and defect tracking tools (e.g., Azure DevOps, JIRA, TestRail, qTest).
• Experience with Excel or similar tools for managing validation results and reconciliation artifacts.

Soft Skills

• Strong attention to detail and a structured approach to validation.
• Ability to analyze data discrepancies and collaborate with developers to narrow down issues.

About NTT DATA

NTT DATA is a $30 billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world's leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. our consulting and Industry solutions help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more than 50 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners.NTT DATA is a part of NTT Group, which invests over $3 billion each year in R&D.

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