COOK: Heat a large pot of water to boiling, salt the water generously and bring back to a boil. Add the pasta, and cook for 1 minute longer than al dente. Drain the pasta once done, but do not rinse. Save a splash of pasta water for later. Cool the pasta on a large plate or baking sheet if time permits.
CREMA: In a measuring cup, combine the sour cream, mayo, lime juice, tajin, minced chipotle, cumin, and garlic powder. Give it a taste and adjust with tajin, salt or lime as needed.
TOSS: In a large bowl, stir the cooled pasta with a splash of dressing. Then add the corn, cotija, cilantro, and jalapenos. Taste and adjust with seasonings as desired.
SERVE: Place the salad in the refrigerator until ready to serve. You can also add cooked, diced chicken to give this more protein or make it a full meal. Store any leftovers in an airtight container.