Bake French fries according to package directions until crispy. Preheat oven to 350 degrees F. In an oven-safe skillet, layer half the fries. Top with half the cheddar and monterey jack, cooked bacon, green onions, and pickled jalapeños. Repeat with remaining French fries and toppings. Bake until cheesy is completely melted, 10 minutes. Serve warm.