Data Quality & BI Tester

About us

Billennium is a global technology company with more than 20 years of experience. We foster innovation, encourage growth, and value collaboration. Join us and help shape the future of technology.

About the client

Our client is a leading retail organization operating across EMEA. As part of their digital-transformation and data-modernization strategy, we support their Business Intelligence team with advanced data validation and reporting.

Tech stack

• SQL / T-SQL | Power BI & DAX | Azure Synapse & Databricks | Microsoft SQL Server (SSIS) | ETL / ELT tools | JIRA

Your role

• Design and run data test cases across data-warehouse layers and BI reports

• Validate Power BI dashboards, semantic models, and DAX logic

• Write SQL scripts to verify data consistency, calculations, and ETL logic

• Identify, document, and track defects while collaborating with BI and engineering teams

• Safeguard data quality during report migrations (e.g., SSRS → Power BI)

What we’re looking for

• 3 + years in data testing, QA, or BI environments

• Strong SQL skills and experience with data warehouses and ETL processes

• Good grasp of Power BI (DAX, visuals, model validation)

• Attention to detail and solid test-plan documentation skills

• Business-level English and clear communication

Nice to have

• Experience with ETL test-automation frameworks

• Knowledge of Azure tools (Databricks, Synapse) and SSIS

• Familiarity with Agile methods and JIRA

• Basic scripting for automated data tests

• A proactive, quality-first mindset

Perks & benefits

• Udemy for Business, private medical care, Multisport, veterinary package, language lessons, shopping vouchers

• Flexible hours and remote/hybrid work options

• Career-growth paths via our partnerships with Microsoft, AWS, Snowflake, Salesforce & more

• Diverse, international team and innovative environment

• Hackathons, CSR initiatives, and team events (incl. annual Mazury retreat)

• Welcome pack on day one

Recruitment process

1. HR call

2. Technical interview

3. Client interview

4. Offer / feedback

Sounds interesting? Click “Apply” and let’s talk! 📞