Staff-level full-stack product engineer responsible for leading frontend architecture and building intuitive, maintainable user experiences in a Ruby on Rails monolith. The role involves hands-on coding, UX and interaction design, simplifying complex workflows, mentoring engineers, reviewing code, collaborating with product and design, shaping technical direction, and participating in on-call and team rotations. The position is remote-first and emphasizes pairing, rapid experimentation, customer feedback, and sustainable delivery.