Preheat grill to medium-high heat.
Cut the salmon fillets into 4 equal-sized patties.
Brush each patty with olive oil and season with garlic powder, cumin, salt, and pepper.
Place the patties on the preheated grill and cook for 4-5 minutes per side, or until cooked through.
While the salmon patties are cooking, make the mango-jalapeno salsa. Combine the mango, jalapeno, cilantro, lime juice, and olive oil in a medium bowl and mix until combined.
Toast the hamburger buns on the grill for 1 minute per side.
Place the grilled salmon patties on the toasted buns and top with the mango-jalapeno salsa.