Preheat oven to 350°F. Line an 8x8-inch pan with parchment paper and spray with non-stick spray.

In a large bowl, whisk eggs and sugar until well combined. Add pumpkin puree, oil, pumpkin pie spice, and vanilla. Mix well.

Add flour, baking powder, baking soda, and salt. Stir until just combined, do not overmix.

Pour batter into prepared pan and smooth the top with a spatula. Set aside.

Combine flour, sugars, and salt in a medium bowl. Drizzle melted butter over mixture and stir with a fork until small crumbs form. Add chopped pecans and mix.

Sprinkle crumb topping evenly over the batter and bake for 50 minutes, or until a toothpick inserted in the center comes out clean.

Allow to cool slightly before slicing. Serve warm or at room temperature.