Internal recruiter constantly messed up scheduling. First interview with team manager very basic. Second interview armature hour hacker rank test which I didn't do. We instead talked about end to end encryption. They are trying to implement a Russian dolls type of encryption where the IoT device has some kind of cheesed down encryption instead of using TLS 1.3 all the way through. Even ESP8266 supports TLS 1.3 using WolfSSL. Manager had no idea how long investor funding would last or when the company would be profitable. A bad sign. I also asked how they planned to compete with the already crowded smart home market. His answer was we make our own hardware. OK, so what, if you cannot support TLS 1.3 on your hardware. My advice is stay away from these jokers. Entire process invoked visions of a startup failure in the making.