MERN Multi-Tenant CRM Development

I need a full-stack developer to build a SaaS-ready CRM on the MERN stack that can be offered to multiple companies from a single codebase while keeping every tenant’s data strictly segregated. Core features... (Budget: $15 - $25 USD, Jobs: Full Stack Development, MERN, MongoDB, MySQL, PHP, React.js, Ruby on Rails, Software Architecture)