Preheat oven to 400F. Line a baking sheet with parchment paper. Set aside.
In a large bowl, combine flour, baking powder, baking soda, salt, and sugar. Cut in butter and work into flour with fingers or a pastry cutter until pea-sized clumps form. Stir in orange zest, caraway seeds, and raisins.
In a medium separate bowl, whisk buttermilk and egg until smooth. Pour over dry ingredients and gently stir until a shaggy dough forms.
Turn dough onto a floured surface and very gently knead several times until dough comes together (be very careful not to overknead or the scones will be tough) Form dough into 9x6 rectangle and cut into 8 even pieces.
Place scones 2 inches apart on prepared baking sheet. If desired, use a sharp knife to score an X on top of each scone. Chill scones in freezer 20 minutes.
Remove scones from fridge and place in preheated oven. Bake scones at 400F 15-18 minutes until golden brown. Brush scones with melted butter.
Cool scones on baking sheet 5 minutes before transferring to a wire cooling rack. Serve scones warm with jam if desired and enjoy!