If you don't want to get scammed, don't look on telegram.

You can post in the marketplace and/or the project development section.
Make sure to describe your project.

Poorly written topics with 10 people asking questions because the OP doesn't contain all the necessary information, will result in only scammers and low quality developers contacting you.
If you are looking for high quality work, create a high quality topic with all the information and be prepared to pay a fair price.