Really hard interview process that isn't just leetcode but tests your true understanding and passion for software engineering, but thats expected with companies that are going to pay you 60k + for the summer

The first round of online assessments were normal hacker rank problems that weren't too difficult in hindsight. It's important to know your data structures, like trees etc. I found it difficult at the time due to it being my first encounter with data structure questions but now that I've learnt it in uni, it should be good.