Axonius Full Stack Developer interview questions

This was a hiring manager 30 minutes interview. i was asked to describe a system architecture of a system I designed in a previous role. The interview went well and the hiring manager seemed impressed at first glance. However, when they called back to inform me about the process the recruiter said i did not qualify on a personal level. When I asked her to elaborate she refused and was overall very rude. To me it seem like a character assasination based on some unknown factors that were assumed quickly and haistly.