Place shrimp in a large mixing bowl. Sprinkle cajun seasoning and bourbon over the top of the shrimp and mix thoroughly until shrimp are coated. Set aside for 5 minutes to marinate.

Pour olive oil in a nonstick skillet and sauté shrimp on high heat for about 3 minutes, until pink. Be sure to turn halfway through cooking for even browning.

Arrange cucumber slices on a platter. Place a small dollop of creme fraiche on each cucumber slice, and top with Bourbon shrimp.