A recruiter contacted me on LinkedIn and we spoke over the phone for about 15 minutes. They didn't even ask for my resume. The recruiter told me that all communications would be handled within 48 hours at each stage of the interview.

They then set up a technical phone call interview. The interviewer called approximately 15 minutes late. They asked a lot about my work and kept stressing technical challenges I'd faced. The coding question was straightforward, and I completed it in 20-25 minutes. The remaining time was used for me to ask questions.

It has been three weeks, and I still haven't heard from them, despite sending a follow-up email. Even if they are not moving forward, they should respond to a candidate's email.

I have interviewed with Airbnb, Uber, Box, and other reputable companies, but their recruiters were professional, unlike at Snapchat.

Basic graph traversal, keeping track of visited nodes.