Cook and drain pasta: Cook pasta according to package directions. Drain. Spread pasta on a baking sheet lined with parchment paper. Let cool completely, about 20 minutes.
Make dressing: Stir together mayonnaise, mustard, lemon juice, Creole seasoning, hot sauce, and salt in a large bowl.
Finish pasta salad: Gently stir in cooled pasta, shrimp, bell pepper, tomatoes, celery, scallions, chives, and parsley until thoroughly coated. Serve immediately, or store in an airtight container in refrigerator up to 2 days.
