Yes. You can redeem each reward as you reach it or you can wait and redeem multiple rewards all at once.
What happens if I don’t redeem a reward immediately?
Due to my total indecision of what to pick for rewards, I was wondering if anyone knows if rewards carry over ranks. In other words say for example I were to have master level interstellar but not redeemed any rewards yet, would I be able to redeem all 5 rewards for each rank all at once?