Pat the shrimp dry and season with salt and pepper. Sauté in a hot skillet for 1–2 minutes per side until pink and opaque. Set aside to cool.
In a small bowl, mash avocados with lime juice, diced onion, chopped cilantro, and a pinch of salt. Stir in diced cherry tomatoes.
Spoon guacamole into each tortilla cup or cracker. Top with one shrimp and a sprinkle of cilantro. Add hot sauce or diced jalapeño if desired.
Chill the assembled bites in the fridge for 10 minutes before serving for best flavor and presentation.