Thaw shrimp, if frozen. Peel and devein shrimp. Rinse shrimp; pat dry with paper towels and set aside. In a small bowl, combine masa harina, chili powder, sugar, smoked paprika, coffee, kosher salt, coriander, and cayenne pepper. Place shrimp in a medium bowl; add spice mixture and toss to coat.
In a large skillet, heat oil over medium-high heat. Add shrimp; cook for 1 to 3 minutes or until shrimp are nearly opaque, stirring frequently. Remove shrimp from skillet.
Add lime juice to skillet, combining it with any spices remaining in skillet. Return shrimp to skillet; cook about 1 minute more or until shrimp are opaque. Remove skillet from heat; add butter. Stir gently just until butter is melted. To serve, sprinkle with cilantro.