Technical Expert/CTO as Co-Founder

We need for our Company (Pre-Seed Start-Up) a Technical Expert/CTO to create the architecture of the product as well the working prototype. This is a hands-on job for the coming months.

Technical Expertise:
- Development in the SFDC environment (APEX etc.)
- R at least conceptually understanding - project @University
- DB/No-SQL DB

we are at a very early stage - there is no salary - the work will be done as Freelancer for equity only until the seed.

What personality do we need? Very ambitious, some experience as architect and a lot of hands-on experience as programmer/DBA