Support Engineer (SF)

WHO ARE PLAIN? Plain is redefining customer support for the next generation of B2B companies. We're building the fastest, most powerful platform to help companies move beyond reactive support and build real customer relationships. Some of the world's most forward-thinking companies — including Cursor, Ashby, Vercel, and Granola — use Plain to unify customer interactions, collaborate faster, and supercharge their workflows with AI. We're a small, tight-knit team with offices in San Francisco and London, and teammates across Europe. This role is based in our San Francisco office, with an expectation of 3+ days a week in person. We tend to start our work days earlier to overlap with our EU colleagues (7:30-8am), but we promise to provide the coffee/tea ☕ and morning tunes 🎵. THE ROLE This is not a "ticket taker" role. As one of our Support Engineers, you'll be a clear owner of support during SF hours and a key member of a growing support function. You'll combine technical depth, s