Line a baking sheet with foil and spray lightly with oil.
Pat the salmon dry using paper towels.
Brush olive oil over each fillet with a basting brush.
Sprinkle salt and pepper evenly over the salmon.
Add gochujang, honey, brown sugar, soy sauce, rice vinegar, garlic, ginger, and melted butter to a small bowl. Whisk until smooth, thick, and glossy.
Preheat the oven to 400°F.
Brush half the glaze over the salmon using a basting brush.
Bake for 12 minutes or until the salmon is almost flaky.
Brush on the remaining glaze and broil for 1 minutes until the edges caramelize.
Remove the baking sheet from the oven and let the salmon rest for 2 minutes.
