Copywriter - Conversion & Growth

Copywriter - Conversion & GrowthLocation: Remote (U.S.) Type: Contract, 1099 (long-term fractional, with potential for full-time conversion based on business need) Reports To: Director of Design As Cro Metrics continues to scale its integrated growth marketing services, the creative team is expanding to meet rising demand across paid media, CRO experimentation, website design, and lifecycle marketing. This role is part of a strategic hiring plan to bring on reliable, high-quality creative talent that strengthens our ability to deliver hypothesis-driven, conversion-focused copy across every client touchpoint.This is a conversion copywriting role. You'll write the words that go inside paid ads, landing pages, experiments, and email campaigns, primarily for B2B and B2C clients. Every line you write has a hypothesis behind it and a test in front of it. You'll also build and manage brand-specific AI writing agents that scale our copy output while preserving voice integrity. You'll work closely with strategists, designers, and analysts to produce copy that moves metrics, not just reads well.This is a long-term fractional contractor role. Most contractors stay on contract, as the relationship is designed to be sustainable at part-time hours, and which flex with client contract cycles. Conversion to full-time employment happens selectively when there's a clear business need and mutual interest. Either way, we're looking for someone we can build with long-term.About Cro MetricsAt Cro Metrics, we're on a mission to redefine growth for organizations and brands through unparalleled digital experiences that inspire action and deliver results. We are an experiment-led growth marketing agency that partners with mission-driven and high-growth companies to scale through data-driven experimentation. Our expertise spans A/B testing, personalization, paid media, lifecycle marketing, and full-funnel digital strategy — empowering clients to make smarter decisions that drive measurable results.Our fully remote team of strategists, analysts, engineers, and creatives works across industries including eCommerce, fintech, nonprofit, and hospitality. We believe in autonomy, collaboration, and innovation as we help our clients grow smarter and faster.About the RoleThe Copywriter - Conversion & Growth is responsible for producing high-quality, hypothesis-driven copy across Cro Metrics' integrated service lines, with a primary focus on paid media and CRO. You'll write paid media ad copy, landing page copy, headline variants for A/B tests, product page rewrites, and email and SMS campaigns, always grounded in a strategic rationale and designed to be tested. You'll work mostly across B2B and B2C clients, adapting messaging to audiences that range from enterprise buyers to direct consumers.This role is ideal for a copywriter who thinks in hypotheses, writes for conversion, and can shift between brand voices quickly and confidently, whether that's a paid social campaign, a B2B SaaS landing page, or a DTC promo. You'll be writing the copy that goes live inside experiments and campaigns, where every word has a measurable impact.The first 5–10 business days of the engagement are a paid evaluation period. You'll do real client work at your full contract rate. At the end, we'll either continue the engagement, extend the evaluation for a few more days if we need more signal, or end the engagement. In all three cases, we'll tell you why and pay for all hours worked.What You'll DoWrite paid media ad copy across platforms (Meta, Google, LinkedIn). This includes headlines, descriptions, and creative copy that drives clicks and conversions.Produce landing page copy from briefs and wireframes, collaborating with designers to ensure messaging and layout work together.Write conversion-focused copy for A/B tests. This could include headline variants, CTA copy, value proposition rewrites, and messaging hierarchy tests where each variant is mapped to a clear hypothesis.Write email and SMS copy for lifecycle campaigns (welcome flows, abandoned cart, win-back, promotional sends) within client brand voice guidelines.Rewrite underperforming copy based on test results and analytics, diagnosing what's not working and proposing data-informed alternatives.Adapt quickly to new client brand voices, absorbing voice guides and existing copy to produce on-brand work from the first deliverable.Collaborate closely with strategists on hypothesis development. Your copy is the execution layer of their experimentation roadmap.Manage your workload across multiple concurrent clients and projects, communicating proactively about capacity, timelines, and blockers.Use AI tools to accelerate drafting, variant generation, and research while maintaining the craft, originality, and strategic rigor that make great copy.Build, train, and manage brand-specific AI writing agents. You’ll be creating custom prompts, voice calibration files, and guardrails so AI output stays on-brand for each