"Aiming for your fl dream company" is a terrible idea in general.

"Dream companies" are usually the dream company of lots of people.

Know what that means?

Excess labor supply

It means you're probably going to be paid poorly, and your workload will probably be dramatically higher than your paycheque warrants, and your managers will not give one shit about you because they've had a thousands "passionate" new hires, and they just turn you all over to keep it cheap.

STOP GIVING FREE LABOR TO COMPANIES