Place the bacon in a skillet over medium heat and cook until crisp. Transfer the bacon to the slow cooker and leave the drippings in the skillet.
Add the beef cubes to the skillet in batches and brown on all sides. Transfer the browned beef to the slow cooker.
Add the carrots, onion, mushrooms, red wine, beef broth, tomato paste, garlic, thyme, bay leaves, salt, and pepper to the slow cooker. Stir to combine.
Cover and cook on low for 8 hours until the beef is very tender.
About 20 minutes before serving, cook the egg noodles according to package directions. Drain and toss with the butter.
Remove the bay leaves from the slow cooker. Spoon the beef and sauce over the buttered noodles and sprinkle with parsley.