This was my first interview after a gap of about 7 years, and I was pleasantly surprised.

The entire process was pretty smooth and took about three weeks.

I had an initial round of phone screening where I was asked to code some string/tree manipulation problems on CoderPad.

I was then called onsite to their SF office, where I met with 6 engineers.

I encountered a variety of domain-related questions concerning SSL, cryptography, AES, IPsec, hashing, etc. A couple of interviewers asked me coding questions about reducing overlapping intervals and system design questions.

The hiring manager spoke to me at the end and answered all questions I had about the team, product, and company.

merge overlapping intervals

Design a system to keep two large data sets in sync.