The process opened with an interview with an external recruiting agency, who was extremely nice and helpful and really went the extra mile to support me. After that, I reached the proper first stage which HR with the participation of the hiring manager, which also went well and really gave me a positive impression about the company. However, the following stage was a psychometric test that I apparently failed, without any possibility to appeal the company's decision (however, it wasn't really clear how the results had been collected except that some intern had worked on them). It's really sad that some companies still rely on this kind of fishy tests and deem them worthy enough to get a complete assessment of a candidate based on it, especially when most of these processes already involve 5/6 rounds, a case study and overall an extenuating experience for the applicant as well. But I guess that the overall score the company has in here speaks for itself, so I might have dodged a bullet. Still, the initial experience with the external recruiters was really nice and I'd recommend them.