Senior Test Engineer (SQL Database)

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

Senior Test Engineer (SQL Database) | Contract Role

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: This is not a pure Automation Test Engineer role. We are specifically looking for candidates with strong hands-on experience in:

• 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 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

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
• Experience supporting enterprise-scale data transformation programmes

Stelfox is fully compliant with GDPR regulations and you can read more in our privacy policy here: https://www.stelfox.com/privacy-policy-gdpr/

Your shared data will not be disclosed or transferred to a third party data controller or data processor located outside the EEA unless we have obtained your express consent.

We look forward to working with you.