Here's the context:
A friend of mine is working at a company A and another company, B, is offering him a job in their company with a high salary. So, he is thinking of changing his company. And I'd like to introduce a person working in the company B.
I have a friend working at the same company as the company that you are thinking of moving to.
I have a friend working at the same company that you are thinking of moving to.
I have a friend working at the same company as you are thinking of moving to.
I think #1 is the most basic sentence (grammatically correct) and the other ones depend on preference. So I think I can use whichever I want. Am I right to think this way? In addition, I'm not sure if it is correct use 'move to another company' in this context?