Senior Frontend Engineer

Who you are

• 6+ years of professional experience in frontend engineering
• A strong portfolio or GitHub that shows your frontend work and your eye for UI craft
• A track record of shipping production frontend features end-to-end, on schedule
• Experience working day to day with designers and product managers
• Expert-level React and Next.js (TypeScript required)
• Strong understanding of design systems, design tokens, and component API design
• Strong fundamentals in state management, data fetching, rendering performance (Core Web Vitals), and testing
• Comfortable working from Figma designs and specs
• Experience with Storybook and at least one of CSS-in-JS, CSS Modules, or Tailwind CSS
• Working knowledge of web accessibility standards (WCAG)
• Clear communicator; able to articulate design and technical trade-offs to engineering, design, and product partners
• Comfortable building within an architecture someone else owns while still bringing an independent point of view
• Experience giving and receiving constructive feedback
• Experience translating motion design concepts into production-ready animations (Framer Motion, GSAP)
• Experience in high-growth DTC or e-commerce companies, ideally on a headless Shopify stack
• Fluency with AI-assisted development (Claude Code, Cursor, or similar)
• Knowledge of A/B testing frameworks and experimentation methodologies
• Background in health, wellness, or science-focused consumer brands
• Experience at a consumer brand known for design craft and obsessive attention to detail

What the job involves

• As a Senior Frontend Engineer, you lead the frontend implementation of Seed's digital experience
• You have a deep love for product, a keen eye for design, and the technical depth to turn ambitious designs into fast, accessible, pixel-perfect features on our React/Next.js platform
• You work inside a design system owned by a Staff peer and contribute production-ready components back to it
• You partner early with Design and Product, own quality on your squad's surfaces, and raise the frontend bar for the engineers around you through code review, pairing, and mentoring
• Lead the frontend implementation of new features, from Figma through production
• Translate designs into production-ready code with obsessive attention to spacing, typography, motion, and responsiveness
• Own the frontend architecture behind your features: state management, data fetching, rendering performance, and test coverage
• Build accessible, performant interfaces that hold up across browsers and devices
• Ship safely: feature flags, A/B tests, instrumentation, and clear rollback paths
• Partner early with Design and Product to assess feasibility and resolve ambiguity
• Build composable, reusable React components into our shared library, following its architecture, APIs, and documentation standards
• Use design tokens and theming consistently so that a component built once is available everywhere
• Document what you add via usage guidelines, code examples, and Storybook stories
• Conduct thoughtful code reviews that hold the squad to a high standard in component design, accessibility, and visual fidelity
• Mentor engineers on the team through pairing
• Champion consistent use of the shared component library across our web applications

Benefits

• Health & Wellness: Choose from multiple medical, dental, and vision plans, with generous employer contributions and coverage options to meet your needs. Enjoy access to top-tier virtual care and a complimentary Aaptiv membership for fitness and mental wellness. We also provide an HSA with employer contributions, along with Fullscript discounts for supplements
• Mental Health Support: All employees and eligible dependents receive 12 free therapy sessions per year, plus coaching, meditation, and 24/7 access to Spring Health’s digital tools and care navigation
• Long Term Wealth Planning: Invest in your future with our 401(k) plan through Betterment, featuring a 100% match on the first 3% and 50% on the next 2% of contributions—fully vested from day one
• Supporting Families: Our Parental Leave Policy includes 18 weeks of fully paid leave, with the flexibility to phase your return. We also offer four weeks of paid transition time at 80% capacity or four days per week
• Time to Recharge: Seed offers 15 vacation days, 7 sick/safe days, 2 personal days, 10 Recharge Days (Summer + Winter), and 15 paid company holidays each year
• Work Flexibly: Thrive in a remote-first culture that prioritizes autonomy and clarity. You’ll also receive a $750 one-time remote work setup stipend and ongoing access to a $450 quarterly wellness and workplace stipends via JOON
• And More: Access pet insurance, life and disability coverage, learning & development, and a vibrant culture rooted in science and impact