It's not very clear cut. Usually they'll go after, I'd say around 80% of the time. Sometimes basic adjectives can go before the noun, such as "petit" (small) and "grand" (big). And adjectives with function rather than a descriptive purpose would go before, such as "plusieurs" (several). And they can go before the noun for emphasis, such as the word "sale" meaning unpleasant or dirty. Colour adjectives and adjectives denoting shape however, will always come afterwards.
If the two adjectives are ones which follow the noun, separate them with "et", i.e., la pomme ronde et rouge. Sometimes one may be a BANGS adjective and the other not, in which case: le grosse pomme rouge. https://www.thoughtco.com/introduction-to-french-adjectives-1368789