Depends on your employer, your contract, your domain, location, etc. If you signed a non compete agreement when you join your employer then you need to make sur

Depends on your employer, your contract, your domain, location, etc. If you signed a non compete agreement when you join your employer then you need to make sure your own business isn't related to the same domain, etc. Distribute your product for free if it is a problem, then when it’s time to quit your job, introduce a non-free version of your product.