Yii Expert for Booking Flow and otherfeatures to impement

I'm seeking a Yii expert to complete a booking flow and develop other features.

Key Areas of Focus:
- Backend functionality is a priority
- Payment integration, confirmation emails, and calendar synchronization are needed

Ideal Skills and Experience:
- Proficiency in Yii framework
- Strong backend development skills
- Experience with payment gateways and API integrations
- Ability to implement secure server-side logic and manage databases

Please provide examples of similar work done.