There's only so much you can do with skin texture, you'll never get a perfect look with bumpy skin but you can definitely help. Stipple on the foundation over the bumpy areas, don't swirl or paint because the surface of spots tends to be very smooth and make-up doesn't stick to it so well. I think a full coverage cream such as Cover FX etc is best to get as "perfect" a look as possible. Let the foundation sit on the skin for a few minutes, blend any areas as needed then powder using a "press and roll" technique with a puff, so as not to knock the make-up off the bumps. Steer clear of any highlighters, shimmery bronzers or foundations with a shimmery or dewy finish on the affected areas as these will make light reflect off the bumps and make them more noticable. A matte finish is more forgiving for this kind of skin.
Using a highlight in areas where there aren't bumps can draw attention to where the skin is smooth and add to the illusion of good overall skin. For example, if the bumps are concentrated around the T-Zone, highlighter on the cheekbones can work well, or vice versa