Mix corn kernels, bell pepper, onion, jalapeño, lime juice, chili powder, salt, and pepper together in a bowl until well combined.
Heat a large skillet over medium-high heat. Add corn mixture and cook until onion is translucent, 5 to 6 minutes. Stir in black beans and cook until heated through, about 2 minutes. Remove from the heat and sprinkle cilantro over top.