Software Development Engineer in Test

ABOUT THE COMPANY

OAG is a leading data platform for the global travel industry offering an industry-first single source for supply, demand, and pricing data. We empower the global travel industry with high-quality, relevant datasets covering the whole journey from planning to customer experience. Headquartered in the UK, with operations in the USA, Denmark, France, Germany, Singapore, Japan, China, and Lithuania. For more information visit

You’ll join a diverse, multi-skilled engineering team in the UK, working on aviation reference data that powers OAG’s core products. We operate with a T-shaped engineering mindset — deep expertise in your craft, with the flexibility to collaborate across disciplines when needed.

This is a hands-on SDET role where you’ll take ownership of test strategy, frameworks, tooling, and data validation. You’ll play a key role in ensuring the quality, reliability, and integrity of large-scale data pipelines and cloud-based systems.

• Design, build, and maintain automated and manual testing frameworks across data pipelines and product surfaces
• Own end-to-end test strategy, covering data validation, APIs, and user-facing workflows
• Create and maintain API tests to validate service integrations and data contracts
• Build UI and end-to-end automated tests to ensure product workflows function correctly from data ingestion through to user experience
• Design and execute performance and reliability testing to ensure systems scale under load
• Validate and verify complex datasets, ensuring data accuracy, consistency, and correctness across environments
• Test ETL processes and data transformations end-to-end
• Embed quality gates into CI/CD pipelines, ensuring automated tests run early and often
• Work closely with developers to review code and champion testability and quality
• Proactively identify gaps in coverage and improve tooling, frameworks, and processes

• Strong experience designing and implementing test automation frameworks
• Proficiency in C# (or strong experience in Java or Type Script)
• Experience with API testing and service-level validation
• Experience building UI and end-to-end automated tests for web applications
• Strong SQL skills with experience validating complex datasets
• Experience testing data pipelines and ETL workflows
• Experience with performance and non-functional testing
• Hands-on experience with CI/CD pipelines and continuous delivery practices

• Experience with Snowflake
• Experience with Playwright
• Experience with JMeter
• Exposure to ETL processes
• Big Data experience (e.g. Databricks, Big Query)
• Experience testing cloud-native systems (Azure preferred)

• Strong ownership mindset with a passion for quality
• Curious and continuously learning
• Comfortable challenging requirements when things don’t add up
• Collaborative, open to feedback, and supportive of team success
• Able to balance pragmatism with engineering excellence

• A flexible hybrid or fully remote working model — you choose
• A non-hierarchical, engineering-led culture focused on innovation
• Opportunities to work on globally impactful data products
• Well-being support and employee assistance resources
• Team events, workshops, and shared learning sessions
• Opportunities to travel to other OAG offices
• Generous annual leave, increasing with service
• A day off during your birthday month

OAG is an Equal Opportunity Employer. We ensure all applicants are considered for employment without discrimination.