Become an Ethereum Core developer. Work on blockchain research, applied cryptography, performance optimizations for networking, multithreading, IO and memory management.
Fully remote - hourly rate 25USD - 40USD (flexible for superstars, possible equity). Everything via Slack - flexible hours - you can choose to work on weekends or choose to never work on weekends, take Mondays off, work in the nights only, work from any place in the world, your choice.