FleetSquad Full-Stack Build

I already have polished desktop and mobile layouts for FleetSquad.com; what’s missing is the code that brings them to life. I need those screens sliced into clean, responsive HTML/CSS and wired up to a robust back-end with four distinct roles: Customers, Mechanics, Admins, and Managers... (Budget: $250 - $750 USD, Jobs: API Integration, Backend Development, Full Stack Development, HTML, JavaScript, Mobile App Development, PHP, Website Design)