Heat oven to 375 degrees. Combine chili powder, cumin, garlic powder, onion powder, and salt. Toss diced sweet potatoes and onions with olive oil and spice mixture.
Place mixture on a sheet pan and spread out into a single layer. Roast potatoes and onions in the oven, tossing half way through the baking time. Remove from oven.
Spread chips out on a sheet pan. Sprinkle chips with shredded cheese. Top with black beans, corn, and roasted sweet potatoes. Cover with additional shredded cheese.