The first contact with the company was a brief exchange of messages on LinkedIn, followed by a phone call with the person who contacted me. In this conversation, she quickly described the company and the job. She also asked a few questions about me, my skills, and my past professional experience. The entire call lasted no more than 20 minutes.

The next step was a coding exercise at Codility.com.

• Two questions, each requiring the submission of an algorithm based on the given requirements, with a total time of 45 minutes.
• At the end of the exercises, a number of tests were automatically run, checking for the correctness and performance of the submitted code.

The coding exercises were quite challenging and required a certain level of coding skills and knowledge of algorithms.

The third step was a video call with the future manager.

In the first part of the call, he described the team and the tasks I would be working on. The second part was a chat about my past experience, how I deal with problems, how I move to find solutions, and how I normally interact with my team.

The fourth and final step was a series of three video interviews of 45 minutes each, with three different senior members of the team.

• During the first interview, the interviewer gave me a coding exercise to complete on a shared screen. He asked me to think out loud so he could follow my train of thought while proceeding with the solution of the problem.
• The interviewer let me follow my ideas but sometimes intervened with questions on the path I was following, perhaps to draw my attention to some important details or to give a useful hint that could point me in the right direction.
• The second interview was about architectures, patterns, best practices, and other technical topics.
• The third interview was more about my personality, how I behave in certain situations, how I interact with my peers, my superiors, and the team. It was a less technical interview, but still technical.

The day after, I was notified that the company was happy to make me an offer, which I accepted.

The entire interviewing process was conducted in a way that I always felt comfortable. Everybody I interacted with was very friendly and made all efforts to make me feel at ease during the interviews.

Indeed, if I have to express an evaluation on the interviewing process, I would say it was very positive.

Implement a convolution filter that applies a given kernel to a given matrix.