Looking for Co-founder - New Business App Startup

Startup is looking for a co-founder (CTO) for new business application that already has investors. We are a marketing company that has built a network of businesses and defined a need for B2B marketing software that we are developing. This SaaS platform will be a turn-key marketing system for small businesses, with gamification. Looking for backend developer with strong background in Salesforce application development for B2B. Your role will be to lead the backend development, as we already have front-end developers. Compensation can be negotiated. Please respond and we can setup a quick call to see if this is a good fit.