Place the chopped shrimp in a glass bowl and cover completely with lime juice, making sure all shrimp pieces are submerged.
Cover and refrigerate for 15-20 minutes, stirring once halfway through, until shrimp turns opaque and pink.
Drain about half of the lime juice from the shrimp, then add the diced tomato, red onion, jalapeño, cilantro, and salt. Stir gently to combine.
Right before serving, gently fold in the diced avocado to prevent browning.
Spoon the ceviche mixture into individual tortilla chip scoops or wonton cups and serve immediately.