The interview process is onerous and disrespectful of a candidate's time. In total, I spent over 12 hours studying for and taking their tests. They did not even have the decency to tell me I was rejected until I followed up days later. Based on their own estimated times, their tests should take about 5 hours (not including studying), but they will take longer if you're not intimately familiar with ECMA6 and graphic algorithms. It is very clear that the company does not understand that a good software engineer will be able to learn any language/function/algorithm. Instead, they are clearly looking for engineers who already have the exact experiences and knowledge as their existing team. This is a great way to build a stagnant engineering team. I should have been suspicious when I saw "10x developer" in their job advert. That is a huge red flag of a toxic engineering department. Emailing with one of the engineers made this readily apparent when I asked for clarification on a scenario not covered in the instructions and he replied by copying and pasting the instructions. This is an engineering department run by "10x developers" who have no communication skills and seem intent on keeping out any engineers who have different backgrounds. My background is in PHP, which the company does use, but none of the interview questions were in PHP. Despite being told the exam would be code agnostic, it was entirely in JavaScript. I have twenty years experience working as a developer and eight years working for a very well-known company admired for its positive culture. By the end of this interview, I honestly didn't even want the job anymore.