Pat the shrimp dry with paper towels and season evenly with sea salt and black pepper.
Heat the sesame oil in a large skillet or wok over medium-high heat until shimmering.
Add the shrimp to the pan and sear for 2-3 minutes until pink and opaque, then remove and set aside.
In the same pan, add the minced garlic and grated ginger, sautéing for 30 seconds until fragrant.
Stir in the chopped kimchi and frozen peas, cooking for 2 minutes to allow the kimchi to caramelize slightly.
Add the cooked brown rice to the skillet, breaking up any clumps and tossing thoroughly to coat in the kimchi juices.
Push the rice mixture to one side of the pan and crack the egg into the empty space, scrambling until just set.
Fold the egg into the rice, return the shrimp to the pan, and drizzle with tamari.
Toss everything together with sliced scallions for 1 minute until heated through and serve immediately.