Reflecting on the interview process, it felt rigorous but ultimately fair. The technical rounds included a challenging design question about a matching engine for a cryptocurrency exchange, which was tough. I also faced a rate limiter implementation task and had to explain my approach to wallet architecture. Interestingly, I found the wallet design question closely aligned with a scenario I had practiced on PracHub. Overall, the experience was eye-opening, and although I received an offer, I chose to decline.

Design a matching engine for a cryptocurrency exchange with high throughput.

Implement a rate limiter that handles millions of concurrent API requests.

Explain how you would design a hot and cold wallet architecture for storing user crypto assets.