Hi, i see you want to build a game launcher with server side addons.
but you didnt mention what platform this launcher is gonna run...
is it for the web, desktop or mobile?
either way, I can it this done for you very quickly, am a well seasoned developer with over 8yrs experience, you can be assured a job well done.
So would just like to know the platform to start with, the we can discuss further.
Would be great to hear from you.
Cheers.