Tell about your experience: what interesting projects have you done, what difficult problems have you solved?

In one interesting project, I worked on a SPA for a large e-commerce platform, where I implemented complex filtering and sorting logic for products using React and Redux. The main challenge was optimizing performance with a large volume of data and minimizing server requests. To achieve this, I used selector memoization, lazy loading of components, and debouncing user actions.

I also participated in developing interactive data visualizations with D3.js, where I had to address issues related to responsiveness and smooth animations across different devices. Overall, the complexity often involved balancing UX and performance, as well as integrating with REST and GraphQL APIs.