Synthetic monitoring uses global testing infrastructure to track user pathways and gauge the influence of web and front-end performance on user experience. It provides comprehensive insight into your website's performance, functionality, and availability from development to production, allowing you to identify and resolve issues before they affect your customers. This talk will show how to monitor a React application.

We often shine a light on backend performance, closely tracking every request, service, and infrastructure element, but the frontend often doesn’t receive the same level of attention.

In this session, we’ll dive into how monitoring the frontend with Core Web Vitals and synthetics can provide meaningful insights into user behavior and application health. Core Web Vitals serve as benchmarks for the user experience, measuring key aspects like page load speed, interactivity, and visual stability. Meanwhile, synthetics let us simulate user journeys to proactively identify issues before they affect real users. Together, these tools bring essential visibility to the frontend, enabling data-driven decisions that genuinely improve the user experience.

End-to-end tests are notoriously slow and costly—especially in mobile development. This talk introduces new tools and techniques to make E2E testing fast and efficient, so you can run tests on every pull request without draining CI resources.

In the past year, we went from zero to 20,000 lines of Playwright tests, pushing its capabilities beyond basic end-to-end testing. This talk will explore the challenges we encountered as we scaled our Playwright setup and how we solved them, thanks to the robust ecosystem and team creativity.