Place the shredded chicken in a bowl and set aside.
Combine hot sauce and melted butter in a small saucepan and warm over low heat, stirring until well blended and bubbling slightly.
Poor the hot sauce mixture over the shredded chicken and toss gently with a fork or tongs to coat all pieces evenly. The chicken should turn a vibrant orange and smell spicy and buttery.
While the chicken cools slightly, slice the slider buns in half horizontally, ensuring they stay intact for easy assembly.
Spread a light layer of dressing on the bottom halves of the buns if desired, then spoon the buffalo chicken generously onto each bottom bun, creating a heaping, saucy layer.
Top with chopped celery for crunch and extra freshness, then place the top bun over the assembly to complete each slider.
Arrange the sliders on a baking sheet and optionally broil lightly for 1-2 minutes until the buns are toasted and the filling is heated through.
Remove from the oven and serve immediately, allowing everyone to grab messy, flavorful bites of spicy chicken in a soft bun.