Editor's Note: This is the second in a series of posts describing how we improved productivity at scale—both in terms of lines of code and number of engineers—at LinkedIn. In our first post of the #ProductivityAtScale series, we shared details on how we improved build time by 400%. This post covers how we continue to improve productivity with Gradle build cache....

Over a decade ago, test strategies invested heavily in UI-driven tests. Backend and mid-tier services were tested using automated UI-based tests. While UI-based tests have certain merits, such as testing user flows, they are also time-consuming and fragile. The strong coupling of tests with UI caused several problems: Tests needed frequent modification due to...