Tell us about the most interesting task or the most interesting failure at one of your last two workplaces.

In one of the recent projects, I faced a task of optimizing the loading of a large number of images on a page. Initially, we simply loaded all images at once, which significantly slowed down the load time and worsened the user experience.

The solution was to implement lazy loading — images would load only when the user scrolled the page to their area of visibility. This greatly improved performance and reduced network load.

The mistake was related to not considering support for older browsers, where lazy loading did not work, and some users saw empty spaces instead of images. We quickly fixed this by adding polyfills and support checks, which became a good lesson on the importance of testing across different platforms.