Data Quality Engineer

Confidential

Limassol permanent

Posted: March 12, 2026

Quick Summary

The Data Quality Engineer is responsible for analyzing and reviewing formulas and calculations in a data analytics project, using tools such as Tableau, Metabase, and PowerBI. This role requires a strong understanding of statistical analysis, data modeling, and data visualization, with the ability to work independently and collaboratively with cross-functional teams.

Required Skills

Job Description

⭐️ CoreStar is a dynamic technology company supporting partners in heavy-load industries with high-performance solutions. Our expert teams bring a startup-driven mindset, focusing on innovation, collaboration, and efficiency in every project. At CoreStar, you’ll have the opportunity to grow your skills, tackle exciting challenges, and directly contribute to impactful products.

📌 Key Responsibilities:

Working in DataOps team as a stand-alone Data Quality engineer (tools like: Tableau, Metabase, PowerBI, Clickhouse)

Requirements analysis, formulas reviews and calculations

Manual testing of SQL views, ETL/ELT pipelines, generated reports according to requirements and system knowledge

Defect management (Jira)

Maintaining test documentation, providing and tracking test coverage

📌 Requirements:

3+ years of work experience as Data Quality specialist, ETL Tester or Data Analyst

Solid knowledge of testing processes, methodologies, test documentation, client-server architecture

Strong knowledge of SQL (all joins, CTEs, sub-queries, window functions)

Experience in web apps testing, incl. working with REST API, tools like Postman, Swagger, DevTools

Experience in monitoring, logging systems (Grafana, Coralogix)

Experience in Data Profiling and Data Cleaning

Strong problem-solving and analytical skills, attentiveness to details, proactiveness

English B1 +

📌 Benefits:
🏝 24 working days of paid annual leave
🤝 6 days of paid sick leave
🖊 Official employment
📄 Medical insurance
☕️ Coffee zone with fruit & snacks available in the office
🥗 Corporate Lunch provided by the company
💪 Gym and sports classes
🙌 Healthy and friendly work atmosphere
📚 Greek and English language classes (partially covered)

Join us and be one of the Core Stars! ⭐

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