Clean Power Research Software Engineer Interview Questions
& Process

I had 3 rounds for the technical interviews. They were Leetcode easy to medium problems. I also had a semi-technical behavioral interview with the CTO. It covered experiences on my resume and knowledge of skills relevant to the job.

The whole process from when I applied to getting the offer took about a month. I could have sped it up, but I asked for more time to study between interviews. Everyone I talked to was really nice and made me feel comfortable. The interviews went like this: HR talk first (about 30 mins), then a technical interview with a Senior engineer (about 1 hour), followed by more technical interviews with a mix of engineers (about 4 hours), and finally, interviews with the leadership team (about 2 hours). The technical parts were challenging but also kind of enjoyable. They seemed to notice I was a bit nervous and tried to help me relax. The questions themselves weren't the hardest, but they asked harder follow-up questions to really see what I knew. It never felt like they were trying to trick me, and they gave good hints and feedback. It felt more like a chat with an expert about stuff we're both into.

I applied on their website, and then a recruiter reached out via email to set up a phone chat. After that, the recruiter emailed again to arrange an online technical interview using collabedit. This interview was with two people, 30 minutes each, done separately. The first person talked about my past projects for about 10 minutes and then asked me to code. The problem was finding the longest unique character substring. I was close but didn't finish coding in 30 mins. The second person asked me to write code to count prime numbers less than a number. I finished that on time, and they seemed impressed, saying their VP of engineering would contact me. A few days later, the recruiter let me know they don't have a spot I'm a perfect fit for.