In a bowl, combine warm water, sugar, and yeast. Let sit for 5 minutes until frothy.
Stir in the salt and melted butter. Gradually add the flour until a soft dough forms. If the dough is too dry, add a splash more water to bring it together. If it is too sticky, add a bit more flour.
Transfer the dough to a lightly floured surface and knead it for 4-5 minutes until smooth and elastic.
Cover the dough with a clean towel and let it rest for about 20 minutes, or until slightly puffed.
Preheat your oven to 400°F. Roll the rested dough into 6 ropes about 1-inch thick and cut each rope into 1 1/2-inch pieces.
In a large pot, combine 9 cups of water with the baking soda and bring to a boil. Working in batches, drop about 8-10 dough pieces into the boiling water for roughly 20 seconds.
Using a slotted spoon, transfer the pieces to a parchment-lined baking sheet and sprinkle lightly with coarse sea salt. Bake for 15 minutes or until the bites turn golden brown. Serve warm.