Prep the skewers: If using wooden skewers, soak them so they don’t scorch.
Pat the shrimp dry with paper towels so the marinade clings well.
Whisk the marinade: In a bowl, stir together gochujang, soy sauce, sesame oil, honey, garlic, ginger, rice vinegar, and gochugaru if using. Add a few grinds of black pepper.
Marinate the shrimp: Toss shrimp with the marinade until evenly coated. Let sit 15–30 minutes in the fridge. Don’t exceed 45 minutes or the acids can toughen the shrimp.
Thread the skewers: Slide shrimp onto skewers, curling each into a “C” so they cook evenly.
Pack them close but not smashed together.
Preheat the grill: Heat a grill or grill pan over medium-high. Oil the grates or pan with neutral oil to prevent sticking.
Grill fast: Cook skewers 2–3 minutes per side, just until shrimp turn opaque and lightly charred. Pull them at the first sign of firmness to avoid rubbery texture.
Finish and garnish: Squeeze fresh lime over hot skewers. Scatter green onions and sesame seeds on top.
Taste and add a pinch of salt if needed.
Serve right away: Pair with rice and kimchi, or wrap in lettuce with cucumber and extra lime for a lighter meal.