A bunch of people already touched on probably the easiest way to do it: converting your full-time job to part time. I wrote about it here if it's helpful to you: https://parttimetech.substack.com/p/easiest-part-time-tech-j....

If that's not an option or doesn't work, there are agencies like https://www.forward.id/ that try to connect people to fractional work, and I created a job board as well https://parttimetech.io.

Good luck!