Cook spaghetti in boiling salted water until al dente, about 10 minutes. Reserve 1 cup of pasta water and drain.

In a large skillet, cook pancetta over medium heat until crispy, about 5 minutes.

In a bowl, whisk eggs, Parmesan, and black pepper together.

Add cooked spaghetti to the skillet with pancetta. Remove from heat.

Quickly pour egg mixture over spaghetti, tossing constantly to create a creamy sauce. Add reserved pasta water if needed.