Preheat your oven to 375°F and cut the corn tortilla into eight triangles.
Brush the tortilla triangles with 0.5 tsp of the olive oil and bake for 8 to 10 minutes until golden and crisp.
In a large glass mixing bowl, whisk together the lime juice, the remaining 1 tsp of olive oil, chili powder, sea salt, and black pepper.
Roughly chop the cooked shrimp into bite-sized pieces and add them to the bowl with the marinade.
Finely dice the cucumber, tomato, and red onion, then fold them into the shrimp mixture.
Gently fold in the diced avocado and chopped cilantro, ensuring the avocado pieces remain intact.
Cover and refrigerate the ceviche for at least 15 minutes to allow the citrus and spices to fully penetrate the shrimp.
Serve the chilled ceviche in a bowl with the warm, crunchy tortilla chips on the side.