OPSWAT interview questions

A long and tiring interview process consisting of over 10 rounds overall. Met the same people several times and they were the most indecisive bunch of people I ever met. They have a take home exercise that takes about a full day to solve properly. We agreed upon a salary range in literally every single round and they told me after the last one that "oh by the way...your salary expectation is out of our budget".

I was invited to the office for a first-round interview, only to be told in person that they were concerned that I had switched jobs too often. This is something they could clearly see on my CV, so bringing me onsite just to tell me that felt like a waste of time and showed a lack of respect for candidates. The interview was conducted by two managers at the same time, which felt unnecessary and added no value to the process. After that, I never received any follow-up or decision — not even after 3 weeks. The lack of communication and basic courtesy says a lot about how the company operates and how they treat people. Overall, the process felt unprofessional and inefficient.