I applied online. The process took two weeks.

The interview process went well, and the overall logistics were clear and concise. I felt like the hiring manager interview round was a very deep dive into technical questions. I didn't do as great as I wanted since this was slightly challenging to answer precisely. I was able to successfully work through the questions, but the hiring manager had higher expectations.

Design a smart doorbell. What sub-systems would it have? How would you interface and integrate these sub-systems? Describe a cool feature to add, and how would you design it?

Can you measure a 1 GHz square wave using a 1 GHz oscilloscope and probe? What is the resulting scope waveform based on the configuration, and why? What is a good rule of thumb for signal integrity in measuring signals using an oscilloscope?

What are ways you could determine a device is charging, assuming no visual indicators are given from the device? How could you determine the design topology of a charger without a schematic, teardowns, or product information?