Bring a small pot of water to a boil, add the egg, and cook for 6.5 minutes for a jammy yolk, then immediately transfer to an ice bath.
Cook the soba noodles in a separate pot of boiling water according to package directions, drain, and set aside.
Heat the toasted sesame oil in a large pot over medium-high heat; season the sliced pork with sea salt and black pepper, then sear until golden and cooked through.
Remove the pork from the pot and add the minced garlic and grated ginger, sautéing for 1 minute until fragrant.
Pour in the chicken bone broth, coconut aminos, and sriracha, bringing the mixture to a gentle simmer.
Add the baby bok choy to the broth and cook for 2 minutes until the leaves are just wilted and the stems are tender-crisp.
Divide the cooked soba noodles into a deep bowl, pour the spicy broth and bok choy over them, and top with the sliced pork.
Peel and halve the soft-boiled egg, place it on top of the ramen, and garnish with sliced green onions before serving.