Multi-Language Booking Website for Co-Working Space

I'm looking for an experienced WordPress developer to create a multi-language (German/English) website for my co-working space and event rooms, similar to https://innovationcampus.biz/. The site needs to have robust booking features with real-time availability, payment processing, and calendar integration.

Key Requirements:
- User account functionalities:
- User registration and login
- User profiles
- Guest checkout options

Ideal Skills and Experience:
- Proficiency in WordPress
- Experience with multi-language site development
- Strong background in integrating booking systems and payment gateways
- Familiarity with user account management on WordPress