I would like to cover two topics: API testing for back-end logic – the most optimal way for young companies. The most popular automated testing approaches, unit-testing and UI testing, are not well suited for those who want to launch their product quickly. Unit tests require a developer’s time while UI tests are slow and fragile. However, if you come back to the roots and implement your application as a classical three-tier system, where front-end uses API endpoints (no server-side rendering), then API testing will give you enough peace of mind with only a minimum of hassle. Screenshot-based front-end testing – an inexpensive alternative to Selenium tests. When wide-spread Selenium tests rely on particular elements of the page, they might not be very stable and also won’t catch any visual changes. Screenshot-based testing, though, compares visual information on the page with a reference image. This gives you the ability to catch both logical and visual changes. As it relies much less on the elements on the page, it is much more stable.