Cook the pasta according to the package directions. Drain and rinse with cold water until cooled, then set aside.
In a large bowl, whisk together the buttermilk, mayo, sour cream, minced garlic, ranch packet, cotija cheese, lime juice, chili lime seasoning, and paprika until creamy and combined.
Add the cooled pasta, corn, crispy bacon, red onion, and jalapeños to the bowl with the dressing.
Toss everything together until the pasta salad is fully coated in the dressing.
Cover and refrigerate until ready to serve. Give it a good stir before serving and top with extra cotija, bacon, cilantro, or chili lime seasoning if desired.