Build a website like Freelancer

I need a website/webapp (deployed) that works similarly to this platform, where:

Users can offer a service, or buy a service.
Support 2 languages.
It would be great if it could also be converted into a mobile app.

Feel free to ask for more details before putting in your offer.
Mention briefly in the bid which technology you will use to proceed.

Looking forward to working together with you:)