Tell about a complex technical problem you had to solve.

One of the challenging technical tasks I faced on the frontend was optimizing the performance of a large single-page application (SPA) with dynamic content and numerous interactions.

The problem was that as the data volume and the number of components increased, the page started to lag, especially on low-end devices.

To solve this, I:

• Conducted profiling using DevTools to identify bottlenecks.
• Implemented lazy loading of components and data to avoid loading everything at once.
• Used memoization and rendering optimization techniques (e.g., React.memo or similar techniques in other frameworks).
• Rewrote part of the logic using Web Workers to perform heavy computations in a separate thread.
• Optimized DOM manipulation, minimizing reflows and repaints.

As a result, I was able to significantly reduce interface response times and improve user experience, especially on mobile devices.