Blockchain Expert

I need a Blockchain expert for my startup. This person should be able to fully manage blockchain projects, solutions and develop respective tools. I'm looking for a responsible and professional person for a long term business relationship, not someone who disappear after a few weeks and left us without support. Consider this a possible full time job with a lot of projects and ideas. Monthly payment negotiable, so ignore the suggested salary here. Monthly payment will be aligned to your service offer.