Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper or lightly grease it with cooking spray.
In a small bowl, mix together the olive oil, garlic powder, onion powder, smoked paprika, brown sugar, salt, and black pepper until well combined.
Place the salmon fillets skin-side down on the prepared baking sheet. Brush the spice mixture evenly over the top of each fillet.
Drizzle the lemon juice over the salmon.
Bake in the preheated oven for 12-15 minutes, or until the salmon flakes easily with a fork and is cooked through.
Remove from the oven and let it rest for a couple of minutes. Garnish with fresh parsley before serving.