Need Firmware for An Cloud Base Capetive Portal

I am From India I want to Develop an Clode base Capetive portal.

I am Finding a expert developer on openwrt who can develope Firmware for My Device (Router). Router continue connect with our server. If any new user try to access wifi it will redirect to our cloud capititive portal. Also if any user execc limit of Data uses he will automatically Disconnected. User can login after OTP verification.

Can any developer help me? If yes how I can contact with you?
What extra feture you can provide me?