Tech Stack: ETL testing Informatica PowerCenter, dbt Data Build Tool, SQL, Snowflake , Git, JIRA Responsibilities 1. QA Strategy and Planning - Define QA strategy for a hybrid ETL stack involving Informatica, and dbt for transformationmodeling. - Analyze STTMs (SourcetoTarget Mapping documents), business rules, and dbt model definitions to derive test scope. - Plan and manage test phases across Program Increments (PIs) or releases: unit testing support, system testing, integration testing, and UAT support. 2. Informatica-Specific QA Responsibilities - Review and validate Informatica mappings, workflows, sessions, and parameter files. - Validate: o Source data extraction (flat files, RDBMS, mainframes, etc.) o Data transformations via mappings (joins, lookups, aggregations, filters, etc.) o Load strategies to stagingODS layers (insert/update strategies, truncate/load, CDC). - Use SQL queries and data comparison tools to perform reconciliation and transformation validation. - Validate job dependencies and control table mechanisms (if used). - Monitor job runs via Informatica Monitor/Workflow logs, and ensure correct execution paths. 3. dbt-Specific QA Responsibilities - Validate dbt models, tests, and documentation in the analytics layer. - Review and test: o Model SQL logic for business rule accuracy and performance o YAML files for correct metadata and testing configurations o dbt tests (unique, not null, accepted values, relationships, custom tests) - Execute dbt test suites using dbt test and investigate failures. - Collaborate with analytics engineers to validate , materialization strategies (table, view, incremental), and source freshness logic. - Review generated SQL in target/compiled to ensure correct transformations. 4. Data ValidationReconciliation - Perform full and sampled data validation across source ? staging ? ODS ? analytics data layers. - Write complex SQL queries to compare record counts, aggregates, and field-level data across layers. - Ensure data consistency and integrity using both manual validation and dbt tests. - Validate PII masking and data obfuscation where applicable. 5. Automation and DevOps Integration - Build and maintain reusable SQL-based test automation scripts for recurring validations. - Integrate QA checks in CI/CD pipelines using git Actions. - Monitor and validate Informatica batch schedules and dbt Cloud jobs (or CLI triggers). - Contribute to QA dashboards and test reporting automation. 6. Defect ManagementReporting - Log and track defects in JIRA, categorize by layer (Informatica/dbt), and severity. - Facilitate daily defect triage calls with data engineering teams. - Provide detailed test execution status reports and test coverage metrics by data domain. 7. Coordination & Stakeholder Engagement - Work closely with data engineers, analytics engineers, data modelers, and product owners. - Represent QA during PI Planning and system demos (SAFe). |