This job posting is for an experienced Interaction Designer to work at a digital design studio in London developing user experiences for major brands. Responsibilities include managing projects and teams, mentoring junior designers, and representing the company at conferences. The ideal candidate has expertise in user-centered design, usability testing, visual design collaboration, agile development processes, and experience designing for devices. The listed tools include design programs like OmniGraffle and project management tools like Jira. Compensation is up to £50,000 depending on experience level.