How do UX designers work with developers?
The designer provides the research and the design while the web developer provides a visual realization of the design as well as a development timeline. This means that web developers and UX designers have interdependent roles and have to work closely together as a team.
Is 27 too old to become a UX designer?
While you may face different obstacles than your younger colleagues, becoming a UX designer (and succeeding!) in your 30s, 40s, 50s (and beyond) is totally doable. In fact there are even advantages and perks that you'll experience that your younger colleagues won't (at least not for a while).