Senior Test Engineer - D365

About The Role

We're looking for a Senior Test Engineer to help drive quality across one of the biggest transformations we've ever delivered. You'll play a key role in our D365 journey, getting hands-on across functional, integration, API, automation and UAT testing to make sure what we build works exactly as it should.

This isn't a role where you'll sit on the sidelines. You'll be working closely with engineers, implementation partners and business teams, understanding how things really work, spotting risks early, and helping us release with confidence. As one of our testing leads, you'll take ownership of end-to-end test activities, champion quality throughout the delivery lifecycle, and look for ways to continually improve how we test.

If you're someone who enjoys solving problems, challenging assumptions, and making complex change feel simple and seamless for customers and colleagues alike, you'll fit right in at AO.

Here's What You Can Expect To Be Doing

Day to day, you’ll be rolling up your sleeves and getting involved in all things testing. From shaping test coverage to running SIT and UAT cycles that reflect real-world use. You’ll create and execute meaningful test scenarios that focus on what’s changed and where the risks are, while also validating end-to-end journeys across D365 and its integrations. Automation will be a big part of your role, where you’ll build and maintain Playwright (JavaScript) tests for key user flows and develop reliable API checks using Postman and Newman to catch issues early. You’ll help keep environments ready for testing, troubleshoot when things go wrong (whether it’s data, config, or integrations), and work across APIs, middleware, and events to pinpoint problems quickly.

Alongside this, you’ll support performance testing, help improve test data management, and collaborate closely with BAs and engineers to bring testing earlier into the process, making releases smoother and more predictable.

A Few Things About You

• Solid, hands-on testing experience within D365 programmes (Finance & Ops, Supply Chain or WMS is a bonus)
• Comfortable being on the tools — executing tests, investigating issues, and seeing fixes through
• Strong experience with UI automation using Playwright (JavaScript)
• Experience building API/integration test coverage using Postman and running tests via Newman
• Confident testing end-to-end integrations and using logs/data to get to root cause quickly
• Good understanding of test data management and keeping testing environments usable
• Experience with SIT, UAT, regression, and end-to-end testing approaches
• Clear communicator who works well with both technical and non-technical teams
• Calm, practical, and solutions-focused mindset
• Keen to improve ways of working without overcomplicating things