People have wrong priorities when working in big corporations. If you want to make an impact you should work towards creating your own business and working in big corporation is just a mean to achieve that. Focus on growing your bank account, good credit history, live lean and in your free time nurture the idea you have, make steps to make it happen.
In some jurisdictions you need to check your employment contract as company may feel entitled to your idea you are developing outside of work hours. Ensure you don't have any such stipulations in the contract.
In some jurisdictions you need to check your employment contract as company may feel entitled to your idea you are developing outside of work hours. Ensure you don't have any such stipulations in the contract.