The visually striking buildings where the action is set have not been created for the movie; these are the Picasso arenas in Noisy-le-Grand, near Paris, designed by architect Manuel Núñez Yanowsky in the 80s.
200 giant huntsman spiders were used in this movie.
First feature film for director Sébastien Vanicek, who had directed a few shorts before. He pitched the movie to producer Harry Tordjman, who loved it and introduced him to Netflix. They loved it as well and thought the movie deserved a theater release before ending up on Netflix, which is a big deal in France as the minimum legal delay in 2023 between a theater release and availability on streaming platforms is 15 months for Netflix (17 months for Disney+ or Prime Video).
Writer/director Sébastien Vanicek really wanted to show the low income housing community in France differently; according to him, whenever it's shown in movies, it's either a drama, with drug dealing and all that, or a corny comedy. His perception is that in real life, it's mostly humming along just fine, with only a few issues here and there.
Writer/director Sébastien Vanicek was looking for ideas around the discrimination faced by black and Arab-looking people in France, and that led him to spiders, which are rarely welcome in homes; whenever they're spotted, they're swatted. As everyone in the story (people and spiders) is treated like vermin by society, the title came to him naturally.