Bring a medium pot of water to a boil, add the shrimp, and poach for 2-3 minutes until they are pink and opaque.
Drain the shrimp immediately and plunge them into a bowl of ice water to stop the cooking process and keep them tender.
Once the shrimp are completely chilled, pat them dry and chop them into bite-sized pieces.
In a large glass bowl, combine the chopped shrimp, diced cucumber, finely diced red onion, minced jalapeño, and chopped cilantro.
In a small jar or bowl, whisk together the lime juice, extra virgin olive oil, chili powder, sea salt, and black pepper until well combined.
Pour the dressing over the shrimp and vegetable mixture, tossing gently to ensure everything is evenly coated.
Carefully fold in the diced avocado just before serving to keep the pieces intact and creamy.