Test Data Analyst

Role - Data Quality Tester - SQL, data testing, ETL validation, reporting quality assurance, CI/CD testing, and data governance experience. Up to £300 per day Location - London Office - up to 2 days a week We're looking for a Data Quality Tester to play a critical role in ensuring the accuracy, reliability, and integrity of data across a growing data platform. This position will help accelerate delivery timelines while maintaining high-quality standards across reporting and analytics. This is an excellent opportunity for someone with strong SQL, data testing, ETL validation, reporting quality assurance, CI/CD testing, and data governance experience who enjoys building quality processes from the ground up. Key requirements: • Own and enhance data quality frameworks across data ingestion, transformation, and reporting layers. • Define, implement, and maintain automated data quality rules, determining appropriate failure behaviours based on business impact. • Develop and maintain automated regression testing for business-critical reports to identify defects before deployment. • Build contract tests that validate schemas and pipeline outputs, preventing upstream changes from breaking downstream reporting. • Create and manage representative test datasets covering complex scenarios, including null values, CDC sequences, and multi-entity data. • Implement automated data assertions and quality gates within CI/CD pipelines to prevent inaccurate or incomplete data reaching production. • Define and maintain report validation baselines, including row counts, key metrics, and variance thresholds. • Investigate and reproduce data defects reported by users, converting incidents into reusable automated regression tests. • Collaborate closely with developers, analysts, and business stakeholders to translate business requirements into measurable and automated data quality controls. • Review transformation logic, SQL changes, and pull requests to ensure all critical business logic is adequately tested before release.