Full-Stack Developer for Salon Management Platform

We are looking for a full-stack SaaS developer to build an app (android & iOS) for a salon management platform similar in concept to "Groomly" (available on play/app store). The platform should include appointment booking, walk-in management, customer CRM, billing/POS, staff scheduling, commissions, loyalty or memberships, and a simple owner dashboard. The ideal freelancer should be strong in React or Next.js for frontend development, Node.js or Python for backend development, and PostgreSQL or MySQL for database design. Experience with payment gateway integrations, WhatsApp/SMS notifications, authentication, role-based access control, and building responsive admin dashboards is highly preferred.