Senior Full Stack Developer

About the Role The Senior Full Stack Developer is primarily responsible for building intuitive, performant, and accessible user interfaces, with additional ownership of backend logic and API work on our Ruby on Rails stack. You'll work closely with product, design, and engineering to translate ideas and requirements into polished, user-centered experiences, while being comfortable working across the stack when needed. This role is ideal for someone who cares deeply about usability and quality, enjoys collaborating across disciplines, and thrives in an environment where ownership, mentorship, and continuous improvement are valued. Key Responsibilities Product & Feature Development Build, maintain, and improve user-facing features using our Svelte SPA, taking ownership from design handoff through deployment. Translate product requirements and design mockups into clean, scalable, reusable front-end code. Collaborate with product managers, designers, and backend engineers to deliver high-quality features end-to-end; contribute to backend logic and APIs (Ruby on Rails) as needed. Ensure consistent implementation of design systems and UI standards across the product. Performance, Quality & Accessibility Optimize applications for performance, responsiveness, and cross-browser compatibility. Write maintainable, well-tested front-end code and participate in code reviews. Ensure accessibility best practices (WCAG) are incorporated into front-end development. Identify and address technical debt and front-end architecture improvements. Collaboration & Continuous Improvement Help set front-end best practices, tooling decisions, and technical standards. Mentor junior and mid-level engineers; provide constructive code review feedback. Debug and resolve issues across the front end and, when needed, the Rails backend. Stay current with evolving front-end technologies and apply learnings where appropriate. Who You Are 5+ years of professional experience as a front-end or full stack developer. Strong proficiency in JavaScript, HTML, and CSS, with experience building SPAs using a modern front-end framework (we use Svelte, but experience with React, Vue, or similar is welcome). Comfortable working with REST APIs and some backend experience (Ruby on Rails preferred, but not required). Strong attention to detail with a user-first mindset. Clear communicator who works well in cross-functional teams and comfortable mentoring others. Nice to Have Experience with Ruby on Rails or a similar backend framework. Experience with TypeScript. Experience implementing browser-side analytics with tools like Google Tag Manager or Amplitude. Experience with testing frameworks such as RSpec and Jest. Exposure to accessibility standards and inclusive design. Experience in healthcare, mental health, or regulated environments. Experience in a startup or scaling product team. Job Type: Contractor Location: Worldwide / Houston, TX - Remote (any location) #J-18808-Ljbffr