Trim the ends of the cucumber and thinly slice using a knife or mandolin.
Place cucumber slices in a mesh strainer, lightly coat with salt, and let drain over a bowl for 10 minutes.
Rinse the cucumbers lightly under cold water, pat dry, then transfer to a large mixing bowl.
Dice scallions, chop cilantro, and mince garlic while cucumbers are draining.
If using frozen edamame, reheat according to package instructions.
Add edamame, scallions, cilantro, and garlic to the bowl with cucumbers and mix well.
Pour rice wine vinegar, soy sauce, and spicy chili crisp over the salad, toss to coat evenly.
Optionally sprinkle with sesame seeds and serve immediately for best texture.