Data Quality Analyst / Data Tester (Bulgaria/Romania)

The role

You will validate data as part of a migration of legacy and TMS-related data into Google BigQuery. You will design and run data quality checks and reconcile source and target datasets for a data platform modernization initiative.

What you will do

• Design ingestion frameworks and implement transformation pipelines
• Ensure data quality and deliver production-grade datasets for analytical consumption
• Validate data across systems, databases, or reporting platforms
• Analyse discrepancies between source and target datasets and identify root causes
• Validate ETL/ELT pipelines for completeness, accuracy, consistency, and transformation logic
• Translate business and reporting requirements into test scenarios and validation rules
• Execute data quality checks, including record counts, null and duplicate checks, referential integrity, field-level reconciliation, KPI validation, and historical consistency
• Document defects and work with Data Engineers to resolve data discrepancies

Required qualifications

• Strong SQL skills, including complex queries, joins, aggregations, window functions, and data comparisons
• Hands-on experience validating data across different systems, databases, or reporting platforms
• Proven experience with data quality testing, reconciliation, and validation of migrated data
• Ability to analyse discrepancies between source and target datasets and identify their root causes
• Experience validating ETL/ELT pipelines, including completeness, accuracy, consistency, and transformation logic
• Good understanding of data models, relationships, schemas, and data dependencies
• Experience testing structured and semi-structured data
• Ability to translate business and reporting requirements into test scenarios and validation rules
• Ability to distinguish between source data issues, transformation defects, and reporting or visualisation issues
• Good analytical and problem-solving skills
• Experience working with Git-based development workflows and Agile delivery teams
• Practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery

Nice to have

• Google BigQuery
• Python
• BI/Reporting Testing
• APIs
• Data Profiling
• Looker
• dbt
• Airflow/Composer
• GCP
• Data Observability

Before you apply

• Work from the European Union region and a work permit are required
• Recruitment process: CV review, HR call, interview, client interview, decision

About the company

Xebia is a global AI-first, digital transformation, and engineering partner with 5,000 professionals across 16 countries. In the CEE region, it is a team of nearly 1,000 experts delivering modern applications, data platforms, and AI solutions.