Senior Frontend Engineer

The role

You will lead the frontend implementation of Seed's digital experience, from Figma designs to production on our React and Next.js platform. You will also build shared design system components, review code, and mentor engineers on your squad.

What you will do

• Lead frontend implementation of new features, from Figma through production.
• Translate designs into production-ready code with close attention to spacing, typography, motion and responsiveness.
• Own frontend architecture for your features: state management, data fetching, rendering performance and test coverage.
• Build accessible, performant interfaces that work across browsers and devices.
• Ship safely using feature flags, A/B tests, instrumentation and clear rollback paths.
• Partner early with Design and Product to assess feasibility and resolve ambiguity.
• Build reusable React components for the shared library and document them with usage guidelines, examples and Storybook stories.
• Use design tokens and theming consistently across components.
• Conduct code reviews on component design, accessibility and visual fidelity.
• Mentor engineers on the team through pairing.

Required qualifications

• 6+ years of professional experience in frontend engineering.
• A strong portfolio or GitHub that shows your frontend work and 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, with TypeScript.
• 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 who can explain design and technical trade-offs.
• Comfortable building within an architecture someone else owns while bringing an independent point of view.

Nice to have

• Experience turning motion design concepts into production 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 methods.
• Background in health, wellness or science-focused consumer brands.
• Experience at a consumer brand known for design craft and attention to detail.

Benefits

• Medical, dental and vision plans with employer contributions.
• Virtual care and a complimentary Aaptiv membership.
• HSA with employer contributions and Fullscript discounts for supplements.
• 12 free therapy sessions per year, plus coaching, meditation and Spring Health digital tools.
• 401(k) through Betterment with a 100% match on the first 3% and 50% on the next 2%, fully vested from day one.
• 18 weeks of fully paid parental leave, with a phased return option.
• Four weeks of paid transition time at 80% capacity or four days per week.
• 15 vacation days, 7 sick/safe days, 2 personal days, 10 Recharge Days and 15 paid company holidays per year.
• $750 one-time remote work setup stipend.
• $450 quarterly wellness and workplace stipend via JOON.
• Pet insurance, life and disability coverage, and learning and development.

Before you apply

• Applications must be submitted through Seed's Applicant Tracking System.
• Unsolicited resumes from recruiters or staffing agencies are not accepted; no fee is paid for them.
• Seed will never ask for payment, banking details, credit card information or Social Security numbers.

About the company

Seed Health is a microbiome science company with clinically validated products for gut and whole-body health, including DS-01 Daily Synbiotic. It also runs SeedLabs, an environmental research division focused on microbial solutions for ecosystems.