Freelancer
Freelance (sometimes spelled free-lance or free lance), freelancer, or freelance worker, are terms commonly used for a person who is self-employed and not necessarily committed to a particular employer long-term. Freelance workers are sometimes represented by a company or a temporary agency that resells freelance labor to clients; others work independently or use professional associations or websites to get work.
Fields, professions, and industries where freelancing is predominant include: music, writing, acting, computer programming, web design, graphic design, translating and illustrating, film and video production, and other forms of piece work that some cultural theorists consider central to the cognitive-cultural economy.
— Wikipedia