Applied online for a frontend role at JetBrains. The process started with a technical interview focusing on coding skills and logical thinking. Challenging yet fair questions tested my proficiency in JavaScript and relevant frameworks.

This was followed by a behavioral round, assessing soft skills and team fit. The HR team was efficient and communicative throughout, ensuring a smooth and transparent process. Overall, it was a positive and professionally conducted experience.

Imagine you're building a web application that needs to handle large sets of dynamic data on the frontend, with frequent updates and interactions from users. How would you ensure optimal performance and user experience in terms of data handling, UI responsiveness, and efficient rendering?

Additionally, explain your choice of tools or frameworks and how they aid in solving these challenges.