Senior Test Engineer (SQL Database) | Contract Role

Stelfox IT Recruitment; Dublin; Hybrid; EUR 60,000 - 90,000; Full time

Job summary

Stelfox IT Recruitment partners with a Dublin-based organisation to hire an experienced Senior Test Engineer (SQL Database) for a large-scale technology programme on a 6-month initial contract. The role is based in Dublin with hybrid work (3 days onsite). Start date planned for October/November 2026.

You will lead end-to-end testing, perform ETL and data migration testing, and validate large data sets using advanced SQL. Collaboration across Agile and Waterfall teams is essential.

Qualifications

• 5+ years of hands-on Software Testing and Quality Assurance experience.
• Strong SQL skills with 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

QA Testing

Database Testing

ETL Testing

Data Validation

Agile & Waterfall

Unix/Linux

Stakeholder Management

Tools

Playwright

Tosca

Job description

Dublin, Ireland (Hybrid | 3 Days Onsite)

6-Month Initial Contract | Rolling Extensions

Start Date: October / November 2026

Stelfox is partnering with a leading Dublin-based organisation seeking an experienced Senior Test Engineer (SQL Database) to join a large-scale technology programme on a long-term contract basis.

Please Note:

• SQL query writing and analysis
• Database testing and data validation
• ETL, data migration, and data quality testing
• Understanding of data flows and data integrity processes

Key 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

Required Experience

• 5+ years of hands-on Software Testing and Quality Assurance 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 reportingStrong 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

Nice to Have

• Experience with automation testing tools such as Playwright, Tosca, or similar
• Exposure to AI-assisted testing tools and technologies, including GitHub Copilot