Dry the shrimp thoroughly with paper towels and prepare all other ingredients nearby for quick access.
Heat a large pan over medium-high heat and add 1 tablespoon olive oil. Once hot, lay the shrimp in a single layer and season with a quarter teaspoon each of salt and some pepper. Cook undisturbed for about one minute until the shrimp starts to turn pink on the bottom.
Stir the shrimp and flip them quickly, adding remaining salt and pepper, cooking for an additional minute until just opaque. Avoid overcooking then transfer shrimp to a plate.
Add the remaining olive oil to the pan and toss in the sliced zucchini. Sprinkle with the leftover salt and pepper. Let the zucchini sauté for 2-3 minutes until it starts to soften slightly.
Mix in the butter and minced garlic, scraping up any browned bits from the bottom. Continue cooking for another one or two minutes until the butter melts and the garlic releases its aroma.
Return the shrimp to the skillet and drizzle the lemon juice over everything. Toss to combine then finish by sprinkling with chopped parsley. Serve hot right away.