Senior Frontend Engineer

Seed Health is a microbiome science company pioneering clinically validated innovations for gut and whole-body health.

Our portfolio of gut-directed products is developed in collaboration with leading scientists and backed by human clinical research. We’re best known for DS-01® Daily Synbiotic—the #1 digestive health probiotic in the U.S.—trusted by millions of people for its benefits in and beyond the gut, including skin, immune, and heart health.

We’ve since expanded our offerings to include PDS-08® for pediatric health, VS-01™ for vaginal health, and a new category of Co-Biotics for daily nutrition, energy, and sleep—each grounded in our commitment to scientific rigor, precision formulation, and impact across the body’s interconnected systems. Beyond the body, Seed Labs —our environmental research division—advances microbial solutions that restore biodiversity and support ecosystems affected by human activity.

We’ve built a profitable DTC business with category-leading retention, grown revenue 5x in the last 36 months, and expanded our reach across new channels and markets. With a robust clinical pipeline and continued expansion into new areas of microbiome health, we’re building for scale—with integrity, care, and curiosity.

Our work has been recognized by Fast Company (Most Innovative Companies, Brands That Matter, World Changing Ideas), TIME (Best Inventions), Forbes (America’s Best Startup Employers), and Inc. (Best in Business, Female Founder 100)—a reflection of the science behind our products and the stories we tell to bring them into the world.

We’re a galaxy-class team of researchers, clinicians, designers, engineers, storytellers, and builders—each aligned in our belief in the transformative potential of the microbiome. If you’re a kindred dot-connector looking to shape the future of health, join us.

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.

• 6+ years of professional experience in frontend engineering.
• A strong portfolio or Git Hub 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.

• 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.
• 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.
• Cha…