What to do with multiple offers?

Hi everyone,

Throwaway account.

I was working for an American startup with a gross salary of €120K but was laid off a few months ago. The job was fully remote.

After interviewing for several months, I’ve finally received a few offers, with the highest being €85K. I really like what the company does, and the team left a great impression on me.
Despite the 30% drop from my previous salary, I’m inclined to accept the offer because I realize that my previous salary was unusually high for my skill level, simply due to landing a role with an American company hiring in Europe.

However, just yesterday, a recruiter reached out about a position at another American startup with a salary range of €110K-€140K. The product they’re building is exciting, and they’re looking to double their engineering team. The catch is that their interview process involves 4 rounds, so it won’t be a quick decision.

I’m worried that if I delay too long, the company offering €85K might retract the offer, especially since they’ve already been waiting for 5 days.

I don't want to start the €85K job, and leave it during the probation period in case I manage to land an offer from the American startup.

For context, all roles are fully remote.

What would you suggest I do in this situation?

EDIT:
- In both jobs I'd be hired through an EOR in my country, so I'd get the same benefits, same day offs, etc.