Chop the raw shrimp into small, bite-sized pieces and place them in a mixing bowl.

Pour the fresh lime juice over the shrimp, ensuring they are fully submerged. Let them marinate for about 15 minutes until they turn opaque.

Add the diced tomatoes, cucumber, red onion, jalapeño, and cilantro to the marinated shrimp.

Season with salt and black pepper, and mix well to combine all ingredients.

Transfer the ceviche to a serving dish and garnish with additional cilantro if desired. Serve chilled.