Any way to do Micro-job site like Fiverr on Wix?
Sure. Wix provides a full development environment for building a site - including frontend and backend. To learn about programming with Velo, read the following articles that will help you start working with Velo:
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About Velo by Wix - what Velo is and what features it has.
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Getting Started with Velo by Wix - step-by-step tutorial on how to start using Velo.
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Onboarding to Velo by Wix - introduction to Velo with short tutorials.
But I really dont know coding, any ways I can Hire Developer at WIX to help me do? and cost?
@shopwholewide
Yes you can hire developers, either you do it here…
https://de.wix.com/marketplace
…or you can contact one of the coding freelancers here at forum, if they will have enough time to create your project. Use the —> User-Profile of each User to get more info.
And here’s the non-German link to the Marketplace 
https://www.wix.com/marketplace
Oh hell, did i post a german link 
sorry 