Cook Pasta: Boil the pasta in salted water until al dente. Drain, rinse under cold water until completely cool, and set aside.
Char Corn: Heat olive oil in a skillet over medium-high heat. Add corn in an even layer. Let sit untouched for 4 minutes until charred, then stir and cook for 2 more minutes. Let cool.
Make Dressing: In a large bowl, whisk mayonnaise, sour cream, lime juice, chili powder, smoked paprika, and salt.
Combine and Chill: Add the cooled pasta, charred corn, jalapeno, and red onion to the dressing. Toss well, then fold in the cotija cheese and cilantro. Chill for 1 hour before serving.
