First round interview is conducted online, basic question on my interest and background and behavorial questions. 1 to 1, casual setting. Example questions include, your incentives, interests, past projects etc.

No response even though they tell you to contact them in case of problem. I sent them clear email about the issue that I faced and didn't get any response. All the time I spent for the technical test is gone!

In order to apply for a job, they give you a weird coding challenge and you have to create a Github account just to submit it. The evaluation criteria is unclear, so you have no idea how you are being evaluated. Also you need to read some weird RFC documents.