I am looking for an experienced full-stack developer to help build an MVP for a SaaS platform that connects a booking system with smart locks for automated access to studios and rooms. The goal is to create a system where customers can book a room online, and the platform automatically generates and sends a temporary smart lock access code that works only during their booking time. This MVP will initially be used in my own studio business, with the long-term goal of potentially expanding it into a scalable SaaS product for other studios and businesses. Core Features Online booking calendar for multiple rooms Automatic smart lock access code generation Temporary door codes linked to booking time Integration with SwitchBot & Sifely smart locks Automated workflows (booking confirmations, access codes, reminders) Basic admin dashboard to manage bookings and access Payment integration (Stripe) Basic user accounts Workflow Example Customer books a room online Payment is processed System generates a temporary access code Access code is automatically applied to the smart lock Customer receives the code by email or SMS Code only works during the booked session Tech Stack (Open to Suggestions) Node.js / Next.js or similar PostgreSQL Stripe API Smart lock API integration (SwitchBot) Cloud hosting (AWS, Vercel, or similar) Project Scope Build an MVP that proves the concept Clean and scalable architecture Well-documented code Ability to iterate and expand features later Budget $50–65 per hour depending on experience. Important Please apply only if you have experience with: SaaS platforms API integrations Booking or scheduling systems Payment integrations IoT / smart device integrations (preferred) When applying, please include: Examples of SaaS or booking platforms you have built Experience working with APIs or smart devices Your recommended tech stack for this project