I'm a senior front-end developer who started out as a full-stack developer decades ago. I currently work at Express (the clothing company not the node web application framework). I spend a lot of my days configuring webpack, creating and updating UX/UI library components, writing React code, and combatting code entropy. I like the team here at Express. I've learned a lot from others and have helped junior devs become not-so-junior. Things constantly change and nobody can know everything. Stackoverflow is a vital resource.