Programmer to refine functionality and support and internet store on Laravel vue js

For an online platform for the sale of building materials to legal entities, it is necessary to refine and maintain the functionality of various complexity, for example:
- implementing a filter based on the distance to the plant using kladr api or similar service
- forming a qr code in bills to pay
- withdrawal of capture forms for users who have passed through advertising
- implementation and management of individual prices for selected customers, etc.
in the response I ask to specify the hourly rate, cases