Local laws may win over whatever is written in the contract. In some places the creative work you do on your free time and your own computer is yours. In other

Local laws may win over whatever is written in the contract. In some places the creative work you do on your free time and your own computer is yours. In other countries that's not the case. In my experience doing creative work across multiple countries you should check with your employer and get written approval to contribute to open source in your free time (or best case, during work times too)