Senior Growth Copywriter

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, SeedLabs—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.

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You

You're a growth-obsessed copywriter who lives and dies by the scroll. You know that the best idea in the world doesn't matter if it doesn't stop a thumb in the first half-second—and you're just as energized by cracking that hook as you are by the bigger brand idea it ladders up to. You write fast, you write a lot, and you write in variations: five headlines when one won't do, a dozen hooks to find the one that earns the click. You're fluent in the native language of paid social—Meta, TikTok, YouTube, etc—and you know the difference between an ad that performs and an ad that just looks good in a deck. You're data-curious: you want to know how your copy actually performed, and you use that signal to write the next thing better. You're production savvy, from testable quick-turn UGC-style content to bigger campaign moments. You're ready for a challenge—something that satisfies and expands your craft, your curiosity, and your microbiome.

This role reports to the Creative Director (Copy), and is an opportunity to do amazing work alongside a wonderful assemblage of talented and kind human beings.
What You’ll Do:

- Own Growth Creative Copy: Develop performance-driven concepts, hooks, scripts, headlines, supers, primary text, and CTAs across TV, Meta, TikTok, YouTube; Think beyond copy alone to how messaging comes to life within the full ad.

- Write for Volume and Velocity: Generate large sets of testable copy variations to feed an always-on testing cadence, working closely with media buyers and performance marketers to know what's working and why.

- Iterate on Performance: Use performance data (hook rate, CTR, CVR, CPA) to inform your next round of copy. You treat every test as a brief for the next one.

- Extend Across the Funnel: Bring growth-minded copy to landing pages, email/SMS, and other conversion touchpoints, in addition to top-of-funnel ad creative.

- Steward Brand Voice: Keep performance copy unmistakably Seed—consistent, clear, and on-voice—even when it's built to convert. Review ad scripts and copy developed by agency and external partners, providing clear, actionable feedback to ensure the