I have heard buddhism seems atheistic.
Correct. AN 3.61 states happiness & suffering are not caused by a creator god, such as Ishvara, Yahweh or Allah.
But I've also heard claims like the Buddha is higher than the 'devas' and all that.
The gods are the kings, queens, politicians, billionaires, etc, or very special spiritual people who have extraordinary love or psychic powers. In short, the 'gods' are merely people.
For example, the story in SN 11.5 about the deva (benevolent) & violent (asura) gods debating how to rule people is obviously powerful people debating political methods (such as democracy vs communism).
This is found in Judaism (a punishing violent god) & Christianity (a forgiving loving god).
Does buddhism believe in god?
In the ordinary sense, no, Buddhism does not believe in god.
are there any suttas which can prove otherwise?
AN 3.61 says happiness & suffering are not due to a creator god such as Ishvara, Yahweh or Allah.
SN 12.44 and AN 4.45 (at the very end) say the world is created by ignorance & the mind.