In a mixing bowl, combine the raw shrimp with lime juice. Ensure the shrimp is fully submerged. Cover and refrigerate for 15-20 minutes until shrimp turns opaque.

Once the shrimp is cooked in lime juice, drain excess juice and add chopped red onion, tomato, cucumber, jalapeño, and cilantro to the bowl.

Season the mixture with salt and black pepper. Toss gently to combine. Serve chilled in a serving dish.