https://microlancer.io

here you have a few, most of them use BTC and shitcoins:

• https://laborx.com/
• https://crypto.jobs/
• https://cryptojobslist.com/
• https://blockace.io/
• https://www.remoteincrypto.com/
• https://remoteok.com/
• https://pompcryptojobs.com/
• https://www.crypto-careers.com/
• https://cryptocurrencyjobs.co/
• https://crypto-job.com/
  *https://blockew.com/
• www.jobs4bitcoin.com
• https://blocklancer.net/
• https://latium.org/

I used the one @k00b shared. I never had any issues with them but the competition on there is very high. I would recommend starting where its a bit easier to earn some sats for your time and skills.