In a small bowl, mix together kosher salt, black pepper, smoked paprika, garlic powder, onion powder, and chili powder.
Rub the spice mixture evenly over all sides of the beef finger ribs.
Heat olive oil in a large skillet over medium-high heat.
Sear the ribs in the skillet for 2-3 minutes on each side until browned. Work in batches if necessary.
Place the seared ribs into the slow cooker.
In a separate bowl, combine beef broth, barbecue sauce, and Worcestershire sauce.
Pour the sauce mixture over the ribs in the slow cooker.
Cover and cook on low for 8 hours, or until the ribs are tender and easily pull apart.
Once cooked, carefully remove the ribs from the slow cooker and place on a serving platter.
Serve hot with your favorite sides.