The interview process is very long and difficult for a freelancer UX designer at Toptal. It takes months to be able to reapply if you fail once. If you fail more than once it will take more than a year to reapply.

Part1- 10 minutes screening interview - 2-3 minutes interviewer talks about Toptal and the rest is basic questions, who you are, what you do, and your skills and what software you use. Part 2- Sending out a PDF version of your portfolio with links to the Projects. Six end-to-end project describing the product, role, Goals and problems. Part3- Portfolio interview- 1 hour 1:1 interview. 30 minutes to talk about two of your projects and the rest is Q&A Part4- Take home assignment, which I haven't done yet.

After applying online, you have a short meeting with HR. Then you get 7 days to submit your portfolio. After submitting you get your answer fast. Unfortunately, my portfolio wasn't good enough, but you get decent feedback and you are encouraged to apply again after 6 months.