HackerOne Software Engineer Interview Questions
& Process

So the whole thing kicked off with a recruiter chat, then I talked to the hiring manager who asked about my background and some behavioral stuff to see if I'd fit in. After that, I had to do a technical test on HackerRank for Rails. Then came a live pair programming session, which was pretty cool and tough. The last technical part was a system design interview about real-world scenarios, and then we talked about the offer. Everyone was super professional and helpful throughout, making sure to understand my background and getting interviews set up when I was free. The recruiter was great at keeping me in the loop and making sure everything ran smoothly.

First, I had a recruiter screen, then I spoke with the hiring manager. After that, there was a technical screen with an engineer, and finally, I had a chat with another engineer. Everyone was really nice and friendly, which helped me relax, especially during the technical part. It felt more like a collaboration than other tech screens I've done; it didn't feel like they were trying to trick me. The people organizing it were also super helpful and flexible when I needed to reschedule. They kept me updated quickly and clearly at every step.

I emailed the company and heard back in about a week. It took another two weeks of back and forth to set up the phone screen because responses were slow. The phone screen covered culture, philosophy, and tools, and HackerOne was very communicative. It then took another two weeks to get confirmation for the in-person interview, again due to slow responses. The in-person part involved lunch, two 1.5-hour pairing sessions where I mostly drove adding features to their existing codebases, and two 1-hour discussions about social/culture aspects. HackerOne asked for references a few days after, which I provided promptly. I followed up three times over three weeks, getting minor updates each time, likely delayed because the last follow-up was around Christmas/New Year's. I got a call two weeks later to inform me they weren't moving forward.