https://coinality.com/
https://www.xbtfreelancer.com/
https://www.cryptogrind.com/
https://www.reddit.com/r/Jobs4Bitcoins/
Ups I ran out of merit but you deserve one, also looking for a freelance site like this, glad I stumble this thread good list, but if you are going to accept paypal payment fiverr is a good option another one and probably the best is the service section of this forum.
The first two i don't seem to be able to register, they have new accounts disabled or something. Both reddit and bitcointalk have lots of people, but you will also lose yourself in the multitude and its not easy to find a category you might excel at.
Last time I checked the two mentioned site above still accept new accounts and I believe the problem will be from your side. However, there's multitude in the crypto business and worlds but anyone that ever lose himself or not excel definitely dont know where he belong to because only people that are in someone else sphere will be lost.
Know where you actually belong and work on your skills.