Modify open source IPv6 proxy server using Cargo Golang

I am looking for a freelancer who can modify an open source IPv6 proxy server using Cargo Golang. The specific modifications needed for this project are additional features.

Open Source:
https://github.com/gngpp/vproxy

Ideal Skills and Experience:
- Expert level familiarity with Cargo Golang
- Strong understanding of IPv6 proxy servers and networking protocols
- Ability to implement additional features while maintaining security and performance
- Experience with open source projects and software development best practices
- Must work on Ubuntu

Features Needed:
- Ability to read Proxy-Authentication header and match username with a subnet in a text file e.g test123_unitedstates = 2a45:a5f2:8400::/48 (Easy to modify for different subnets in future)
- Ability to read Proxy-Authentication header and read parameter in username to change IP rotation time e.g test123_unitedstates;time=2 which is 2 minutes, max can be any amount
- Ability to read Proxy-Authentication header and read parameter in username to target 1 specific IPv6 address

Timeline:
- The expected timeline for this project is 1-2 weeks.