I apply through the website and got the first email from a bot to schedule a screen call with the recruiter. The interview with the recruiter was pretty ok. General questions about my background, how long time to relocate and salary expectations.

After that, he sent me a challenge assignment that was 100% coding. The assignment was well defined (goal, requirements, bonus tasks) and to be done in 72h. I completed ok so it took me to the next step which was 2 technical interviews, 1 hour each, with SREs.

The first interview was focused on the challenge that I made (what improvements I could have done, how to put on production, security concerns, etc). Also, focus on fundamental questions about networking and security in general.

The second interview was focused on practical activities. The guy described an infrastructure that he had on his house for smart home and asked me what concerns I had and how I would improve it.

I had a good expectation from these two interviews and the 2 guys were pretty friendly but, unfortunately, after that I got an email from the recruiter saying they would not move forward on my process.

Please explain TCP and UDP, asymmetric and symmetric keys, the TCP handshake, the TLS handshake, DNS, and HTTP headers.

How do you improve your skills? What is the last thing that you learned? Please explain CI and CD.