Custom CRM & Workflow Automation Build

I need a tailor-made CRM and workflow automation system that mirrors the way we actually work and can comfortably support about 51-100 active users. The end product must be scalable, intuitive for non-technical staff, and flexible enough to grow with our operations... (Budget: ₹12500 - ₹37500 INR, Jobs: CRM, MERN Stack, Progressive Web Apps)