I need an expert in Hardware Design and Prototype

I have developed a POC for a bike box where you can open a bike box (kind of schelter with 5 bikes) by an RFID card. Access is checked from a remote server, (directly or in some cases by a whitelist checked every 24hrs).

This POC works fine, but now we want to go a step further, and have our own device instead, as we have some specific requirements.

Further details I will share in chat.