As mentioned in your job posting, you need a custom social network for a specific group of people.
I am 10 years experienced developer myself and lead a team of 3 designers and 5 developers. I am offering my services to do this job. I am confident that I will provide you what actually you are looking for.
I am available any time that you need to discuss this posting in more detail. Please send a message via PMB and I will get in touch with you.