Heat olive oil in a skillet over medium heat.
Add chicken, chili powder, cumin, smoked paprika, garlic powder, salt, and pepper.
Cook for 3 to 4 minutes until warmed through and lightly golden. Remove from heat and set aside.
In a small bowl, whisk ranch dressing, salsa, lime juice, chili powder, and smoked paprika until smooth.
In a large bowl or serving platter, layer romaine lettuce, cherry tomatoes, corn, black beans, avocado, red onion, and shredded cheese.
Top the salad with the warm seasoned chicken.
Drizzle the Southwest dressing over the salad just before serving.
Add tortilla strips, cilantro, and jalapeño slices if desired.