Preheat the oven to 350°F (175°C) and grease a 9x5 inch loaf pan.
In a mixing bowl, cream together the softened butter and sugar until fluffy.
Add the eggs one at a time, mixing well after each addition.
Stir in the vanilla extract.
In another bowl, whisk together the flour, baking soda, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, alternating with buttermilk.
Fold in the sliced strawberries gently.
Pour the batter into the prepared loaf pan and smooth the top.
Bake for 50-60 minutes, or until a toothpick inserted in the center comes out clean.
Let cool before slicing and serving.