I need website backend development frontend is ready for Car service booking

The frontend for my car-service booking platform is already live; now I need the production-ready backend that will power it. I have chosen PostgreSQL as the primary datastore, so the service layer should make full use of its relational strengths and deliver clean, well-indexed schemas for vehicles, users, bookings and service records.

Core user flows
• Authentication: secure registration and login (token or session based)
• Profile management: update personal details, contact info and preferred vehicle list

Booking flows
• Appointment scheduling: create, reschedule and cancel slots, with mechanic or bay assignment logic kept flexible for future expansion
• Service history tracking: persist completed jobs so users can view past work, parts used and costs

Please include clear endpoint naming, error handling and Swagger or similar docs so my team can integrate quickly. Basic unit tests that demonstrate the main success and failure paths are expected.

If you have questions about deployment or want to recommend best-practice middleware (e.g., Express, Fastify, Django, etc.) let me know ­I’m open, as long as PostgreSQL stays at the core and integration with the existing UI remains smooth.