I applied through an employee referral. The process took 3 weeks.

• 1. Phone interview: Initial evaluation with a recruiter, especially to verify resume information, salary expectations, and check the English level.
• 1. Online coding assessment, with two easy or medium level exercises, LeetCode style. (Before taking the assessment, you can do a practice exercise, where they give you LeetCode-based exercises, but it's mostly to get familiar with how the platform works, because the problems in the actual assessment are quite different.)
• 1. 1-to-1 interview with a developer, to do another coding test. In this case, you are given a "Hard" level coding test, probably chosen by the person interviewing you.
• 1. Interview with various members of the work team, to thoroughly review the person's background and experience.
• 1. Formal offer.

Regarding the "1 to 1" interview for the second coding test, my personal experience was not very good. The person who interviewed me didn't seem very interested in the process and didn't even turn on their camera.

Finally, they present you with a complex programming problem and you have 15 to 20 minutes to solve it while interacting with the interviewer and being observed.

In my case, I didn't manage to solve the problem during the interview; I ended up needing 2 more hours to find a good solution (after the interview had already ended).

Although the offered role is not 100% for programming, it seems they are looking for "hardcore" programmers with a lot of experience in algorithms. In my case, I had never faced a similar problem before and the interviewer barely interacted with me (I would describe it as a slightly awkward monologue).

I recommend practicing a lot with HackerRank or LeetCode exercises and being familiar with:

• different algorithms
• working with matrices
• logic problems
• recursion

Finally, cross your fingers that in the interview you get a problem you've faced before.