Without going into specifics due to an NDA contract, I will try to be as specific as I can to provide some useful feedback. I was interviewing for a lead engineer position.

In general, it was a good experience. The work environment seemed friendly and not as hectic as a regular startup would be. Job security seems good, as they are privately held (corporate) with Series E funding. Engineers seemed competent and experienced. Management seems competent enough to know to focus on specific directions and guide the ship toward them. Unfortunately, I have heard of situations where my previous coworkers talk about low-balled offers. That notion got me biased and also made me realize I was probably in the same boat. After some unsuccessful renegotiations, I sadly had to reject the offer.

Tips:

• There is NO LUNCH PROVIDED. I had to power through with just snacks and coffee.
• Brush up on system design. Make sure you can come up with justifications for everything you design. Ask lots of questions. Interviewers were very helpful in providing clarification. Start simple and scale upwards to handle complicated use cases.
• Don't be afraid to ask questions. I was not able to understand the coding question for a while, and the interviewer had to use a few examples to clarify it. It took a few extra minutes, but you'd rather have that than come up with a wrong solution.

Talked with a senior manager about work experiences and past projects.

System design question for data ingestion from an external source.

Coding exercise to validate a lineup.

Object-oriented design question for a restaurant system.

Designing an employee tracking system.