flop float river bluff, bad move or no?

If you aren't sure of his barreling tendencies, I think bluff raising the flop would be better than calling. Despite the fact we don't rep much and never really have anything, villain is likely a poor hand reader if we decide to just make an assumption based on the average random at 25nl about how he's going to react. Most likely will just fold all air, and perhaps call 1 or 2 streets with a pair depending on how the board runs out. We have some backdoor draws which will produce good barrel cards. Raising the flop will also threaten your opponents stack early in the hand because he will have to guess at whether or not he will face multiple streets of betting.

I like raising the turn since you've picked up some outs. It's a bit more of a standard danger line than call/call/jam river too. I like M2M's suggestion too tho.

You don't have any reads on villain? Whether it's profitable or not depends on those, but you're doing this to someone who opened UTG 5x and 3 barrelled, even if the river is a blocking bet.

Were you considering a river shove earlier in the hand, or did you just call down to the river and then react to villain's betsize?