Legally speaking, many companies will have as part of your employment contract the stipulation that you cannot work in the same field in your off time. Also tha

Legally speaking, many companies will have as part of your employment contract the stipulation that you cannot work in the same field in your off time. Also that all your intelectual property created while under employment, including non-work hours, is primarily the company's to monetise, unless they are not interested in a specific piece and explicitly give you permission to monetise it separately.