Isabelle Cosar
John Lewis Partnership (UK)


Isabelle, a French Product Engineer, based in London (UK), with 25+ years of experience in quality engineering, is passionate about performance and operability testing. She has a proven track record in the financial services industry, where she led non-functional testing teams. She is now a DevOps Engineer in microservices at John Lewis, a leading UK retailer with a well-developed e-commerce platform.

About the Presentation

Google Core Web Vitals: Mobilising and Testing Front-End Performance in Microservices
Session Speech


Google Core Web Vitals (CWV) are a set of metrics that measure the front-end performance of websites. They are crucial to online stores like ours as they measure the user experience of a website and affect our website’s ranking in Google search results.
In this talk, I will show how to mobilise DevOps microservices teams to test and monitor CWV continuously.

I will also show an example of a microservice team’s testing and monitoring process. Come learn how to improve your website’s front-end performance!