Whether you are an experienced developer or not. Especially often faced with bugs beginners entrepreneurs. Why does this happen? Less pay to the developer, a lot of edits, developers are working in different ways as a rule freelancers.
A freelancer is an independent entity and the developed product is different from one freelancer developer to another. If you're given a project and they say, "There are a few bugs left, but they will not prevent further work," think in the long term will not cost you more to fix the bugs than product development.
Analyze your product, conduct tests, automatic and manual, get support from a specialist. This will save you time and nerves)
Have you encountered a similar situation? If yes, share your experiences, we will eliminate bugs together)