Move an oven rack to the center position and preheat the oven to 350°F (175°C) for a full 10 to 15 minutes. Grease a 9x5-inch loaf pan with vegetable oil or line it with parchment paper, leaving overhang as handles.
Chop 1 cup of dried figs into small, raisin-sized pieces. If the figs feel very dry or hard, soak them in warm water for 10 minutes, then drain, pat dry, and chop.
In a large bowl, whisk together the flour, granulated sugar, brown sugar, sea salt, baking soda, cinnamon, and nutmeg for about 30 seconds, breaking up any lumps of brown sugar.
In a medium bowl, whisk the eggs lightly, then add the vegetable oil and buttermilk and whisk until smooth with no streaks of oil.
Pour the wet ingredients into the dry ingredients and gently fold with a spatula until the flour just disappears; the batter should look slightly lumpy but uniform.
Gently fold the chopped figs into the batter until evenly distributed, separating any clumps with your fingers.
Transfer the batter to the prepared loaf pan, smooth the top with the back of the spatula, and tap the pan lightly on the counter to release air bubbles.
Bake on the center rack for 55 to 65 minutes, until a toothpick inserted into the center comes out clean or with just a few moist crumbs and the top is golden brown and slightly cracked.
Cool in the pan for 10 minutes, then transfer the loaf to a wire rack to cool completely before slicing.