Make the crab cake mixture. In a large bowl combine eggs, mayonnaise, Dijon, pepper, baking powder, lemon juice, old bay seasoning, paprika, Worcestershire sauce, and ½ cup parsley. Mix well with a spoon and then mix in the crab meat. Cover and refrigerate for 30 minutes.
Make the aioli. In a small bowl, combine mayonnaise, lime juice, sriracha, and 1 tablespoon parsley. Mix well. Cover and refrigerate until needed.
Form the crab cakes. Remove the crab cake mixture from the refrigerator. Using your hands, form into 8 small patties.
Prep the buns. Split the buns. Spread a thin layer of butter onto the cut sides of each bun. Place butter side down into a large skillet over medium heat and toast until golden brown on the bottom.
Fry the crab cakes. Heat oil in a large skillet to medium-high heat. Add the crab cakes and cook for 3-4 minutes per side until golden brown.
Assemble sliders. Lay out the slider bun bottoms. Top with romaine lettuce, then a crab cake. Spread spicy aiolis onto the inside of the top bun halves. Place the top bun onto the slider.