A leading digital product consultancy is seeking a Principal Full Stack JavaScript Engineer to join their growing Engineering team. In this hands-on role, you will lead efforts to modernize architecture and transform a monolithic JavaScript platform into structured components. Ideal candidates will have deep expertise in JavaScript and Node.js, strong problem-solving skills, and the ability to collaborate with senior engineers. This position offers flexible working arrangements in Newcastle or other UK locations. #J-18808-Ljbffr