1. No matter what the rank is if he's willing to do transaction with escrow. It's legit.
2. Look for the quality of his/her posts. You will know if he/she is a professional by looking at his/her post (Not all some of the big companies tries to scam too.)
3. Look for his/her background information (But of course we're in the internet, we don't know exactly who's behind it.)
4. If it's a company or project manager, look at the projects background, reviews and team.
5. Most of the legit peoples or companies will post the escrowed fund (But of course not all.)
6. They will hire a reputable managers (There's a high chance that if they hire reputable manager it's legit because most of the reputable managers review the project first)
we do have different basis in my case here's the thing i look for before investing to something, starting to transact etc.
Many people have lost their money in the hands of these scammers like there are thousands of jobs on lime but most are scams and do not pay to its workers. Thanks for such nice information.