Expertise developing complex web applications with React, JavaScript, and modern CSS frameworks Expertise with Ruby on Rails (preferred) or other backend frameworks Ability to plan, estimate, and execute complex projects independently Ability to write high-quality, well-tested, performant, and accessible code Clear communication skills Partnering effectively with Product and Design Working across a legacy codebase and evolving it safely Diagnosing root causes of problems and proposing solutions Mentoring and teaching other engineers