Optiver reached out to me after finding my resume online. It was a very quick process.

I had a 30-minute behavioral interview, which felt very natural. After that, on the same day, I was given a HackerRank assessment that I had a full week to complete.

The challenge was very doable. I had 24 hours to solve three problems, which did take a few hours (it was not the usual one-hour challenge; it was a "project" where I suggest you use your best coding practices).

After that, I was invited on-site. This consisted of four interviews:

• A code review of the HackerRank assessment
• A design interview (basically a technical interview without coding)
• A behavioral interview
• An executive talk with the CEO and CTO

Overall, the experience was great. To be honest, I thought the behavioral interview didn't go great because my interviewer was very adamant about "only the best can get a job here" and that you have to "be the best not to get cut."

The whole process took probably only three weeks, so props to Optiver because, from my experience, some companies take months even if they are interested in you.