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Seed Health is a microbiome science company pioneering clinically validated innovations for gut and whole-body health. Known for DS-01® Daily Synbiotic, the #1 digestive health probiotic in the U.S., the company has expanded into pediatric health, vaginal health, and Co-Biotics for daily nutrition, energy, and sleep. The company has built a profitable DTC business with category-leading retention, grown revenue 5x in the last 36 months, and expanded reach across new channels and markets.
As Senior Growth Copywriter, you will own performance-driven creative copy across paid social channels (Meta, TikTok, YouTube, TV). You'll develop concepts, hooks, scripts, headlines, supers, primary text, and CTAs—thinking beyond copy alone to how messaging comes to life within the full ad. You'll write for volume and velocity, generating large sets of testable copy variations to feed an always-on testing cadence, working closely with media buyers and performance marketers to understand what's working and why.
You'll iterate on performance using data signals (hook rate, CTR, CVR, CPA) to inform your next round of copy, treating every test as a brief for the next one. You'll extend growth-minded copy across the funnel to landing pages, email/SMS, and other conversion touchpoints. You'll steward the Seed brand voice, keeping performance copy unmistakably on-brand—consistent, clear, and conversion-focused—while reviewing ad scripts and copy developed by agency and external partners to ensure strategic soundness and performance alignment.
You'll work collaboratively with art directors, designers, motion designers, growth marketers, strategists, and cross-functional partners to ship work quickly and iterate faster. This role reports to the Creative Director (Copy) and is an opportunity to do amazing work alongside a talented and kind team.
