Senior Data QA Engineer

Senior Data QA Engineer

Join Exadel.

About the Client

The customer is one of the largest online gambling companies in the world, with over 26 million clients across all markets. The company was founded in 1997 and listed on Nasdaq Stockholm in 2004. They are committed to offering their clients the best possible deal and user experience, while ensuring a safe and fair gambling environment.

• Data quality for clickstream & web analytics
  • Validate Snowplow / clickstream events from collection through to warehouse and reporting layers
  • Check event schemas, properties, timestamps, user IDs, sessions, and attribution fields for accuracy and consistency
  • Monitor and flag issues such as missing or duplicate events, unexpected spikes/drops, schema drift / unannounced changes
• QA for reporting pipelines
  • Test and validate ETL / ELT pipelines feeding dashboards and reporting tables (e.g., marketing, product, funnel performance)
  • Compare source vs transformed data to ensure metrics (sessions, clicks, conversions, revenue, etc.) are accurate and reconciled
  • Help define data quality checks (row counts, null checks, referential integrity, thresholds, anomaly detection)
• Test design & execution
  • Work with Analytics and Data Engineering to define test cases for new tracking requirements and events, and regression tests when pipelines or schemas change
  • Execute tests in staging and production environments using SQL queries, test scripts, and tool-based checks
  • Log defects clearly and track them through to resolution
• Collaboration & communication
  • Act as the bridge between Analytics and Data Engineering: translate analytics requirements into testable data conditions; escalated issues with clear impact statements
  • Partner with Data Engineering to clarify and request access to tables, views, logs needed for QA; align on SLAs for data delivery and fixes
  • Coordinate with web / app teams where tracking implementation needs changes
• Governance & documentation
  • Maintain up-to-date documentation of event schemas, naming conventions, known data caveats, and test plans, standard QA procedures
  • Contribute to data governance by flagging inconsistent naming or definitions, helping enforce standards across teams

• Strong experience in data quality / data QA / analytics engineering roles
• Hands‑on experience with clickstream or web analytics data (e.g., Snowplow, GA); SQL for investigation, reconciliation, and QA; working with data warehouses/lake houses (e.g., Redshift, Big Query, Snowflake)
• Experience testing data pipelines (ETL/ELT) and reporting layers
• Comfortable working with analytics teams and engineering/data engineering teams
• Strong communication skills: ability to explain data issues clearly to both technical and non‑technical stakeholders; document data issues, risks, and decisions in a structured way

• Exposure to Snowplow, event schemas, Iglu, enrichment, loaders
• Familiarity with BI tools (Power BI, Looker, Tableau), data modelling or transformation frameworks (dbt)
• Experience with data observability / quality tooling (Great Expectations, Monte Carlo, Soda, etc.), version control (Git) and engineering‑style workflows (PRs, code reviews)
• Understanding of web/app tracking implementations (tags, data layers, SDKs)

Intermediate or higher

• Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more
• Reasonable accommodations are available to enable individuals with disabilities to perform essential functions
• Please note:
  
  this job description is not exhaustive. Duties and responsibilities may evolve based on business needs

• International projects
• In‑office, hybrid, or remote flexibility
• Medical healthcare
• Recognition program
• Ongoing learning & reimbursement
• Well‑being program
  
  Team events & local benefits
• Sports compensation
• Referral bonuses
• Top‑tier equipment provision

We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.

Mid‑Senior level

Full‑time

Engineering and Information Technology

IT Services and IT Consulting, Information Services, and Software Development

$ - $ (Poland, 11 months ago)