Senior SQL Database QA Lead | ETL & Data Quality

Stelfox Limited; Dublin; Hybrid; EUR 70,000 - 95,000; Full time

Job summary

Stelfox is partnering with a Dublin-based organisation to hire a Senior Test Engineer (SQL Database) for a 6-month contract. The role is hybrid with 3 days onsite in Dublin. Start date Oct/Nov 2026 and rolling extensions are possible.

You will lead test planning, design, and execution with emphasis on SQL data validation, ETL testing, and data quality across large datasets within Agile and Waterfall environments.

Qualifications

• 5+ years of hands-on Software Testing and QA experience.
• Strong SQL skills, including writing complex queries and data validation.
• Proven experience in database testing and data quality verification.
• Extensive experience with ETL Testing, Data Migration Testing, and Data Conversion Testing.
• Experience managing end-to-end testing cycles and defect reporting.
• Strong understanding of test methodologies, test design techniques, and QA best practices.
• Experience working within Agile software delivery teams.
• Familiarity with Unix/Linux environments.
• Excellent communication and stakeholder management skills.

Responsibilities

• Lead test planning, test design, execution, and defect management activities
• Perform end-to-end ETL, data migration, data conversion, and data quality testing
• Design and execute comprehensive test cases and test scenarios
• Validate large data sets using complex SQL queries and database testing techniques
• Collaborate with development, production support, change management, and business teams
• Drive QA delivery across multiple releases and project workstreams
• Develop and maintain test plans, test scripts, and traceability documentation
• Work across Agile and Waterfall delivery environments
• Support continuous improvements in quality assurance practices and testing processes
• Contribute to automation and AI-enabled testing initiatives where appropriate

Skills

SQL

Database Testing

ETL Testing

Data Migration Testing

Data Quality Testing

Agile

Unix/Linux

Stakeholder Management

Test Design

Tools

Playwright

Tosca

Job description

Stelfox is partnering with a Dublin-based organisation to hire a Senior Test Engineer (SQL Database) for a 6-month contract. The role is hybrid with 3 days onsite in Dublin. Start date Oct/Nov 2026 and rolling extensions are possible.

You will lead test planning, design, and execution with emphasis on SQL data validation, ETL testing, and data quality across large datasets within Agile and Waterfall environments.