DataArt Node Js Developer interview questions

I was contacted via LinkedIn and was informed about a position for a Node.js Developer (Mid–Senior level). The recruiter mentioned that the fixed salary for the role was $3,500, which was the amount available to close the position. After that, I had an interview with HR, they asked some questions about me, my experience, the reasons I left my previous companies, and what made me interested in joining DataArt. Then, they scheduled an "English check" call. During the English check, I just had a normal conversation with the guy, everything went smoothly, and after less than five minutes he said, “Oh, I can see that you’re fluent in English and very confident, I’ll move you to the next stage.” However, when I got back in touch with the recruiter, she told me that the position had already been filled internally. Unfortunately, that was it, I didn’t get to move forward to the other stages.