Conversion Rate Optimization Specialist / Sr. CRO Specialist

Aquent is partnering with a leading organization at the forefront of its industry, renowned for operating one of the world’s largest premium platforms. We are seeking a visionary and hands-on Experimentation Specialist to drive the core of our growth strategy. In this role, you won’t just run tests; you’ll be instrumental in shaping the future of user experience, directly impacting key business metrics and influencing strategic decisions across the entire organization. Your expertise will unlock new insights, optimize user journeys, and accelerate our mission to deliver unparalleled value to a global audience. This role is designed for a hands-on operator who thrives in a fast-paced environment. From day one, you’ll dive into our existing testing infrastructure, swiftly auditing current experiments, identifying areas for improvement, and launching more rigorously instrumented tests. You’ll be a central figure in our growth ecosystem, collaborating closely with teams across digital advertising, lifecycle marketing, search engine optimization, creative, data and analytics, product development, and brand strategy.

Responsibilities

Develop and maintain a dynamic testing roadmap and hypothesis backlog across digital advertising, email/lifecycle marketing, landing pages, onboarding flows, monetization strategies, and creative assets; Prioritize experiments using a clear framework; Provide weekly updates on ongoing tests, learnings, and upcoming experiments to leadership and channel owners; Design and launch robust A/B, multivariate, holdout, and geo-based experiments; Ensure precise tracking, event instrumentation, and attribution with Data & Analytics and Engineering teams; Conduct thorough analysis of test results and distinguish statistical significance from business significance; Translate winning results into concrete channel-specific actions; Present complex findings to cross-functional stakeholders; Connect the dots across channels and build shared creative/messaging frameworks; Partner with digital advertising, lifecycle marketing, SEO, and content teams; Maintain a searchable repository of test results and champion a test-and-learn culture

Requirements

Hands-on experience running A/B or multivariate tests in a marketing or growth context (digital advertising, email, landing page, onboarding, or monetization strategies); In-the-tool fluency with at least one industry-standard experimentation or A/B testing platform, with the ability to set up and quality assurance tests independently; Strong working understanding of experimental design principles (control/treatment setup, sample sizing, statistical significance, validity threats); Robust analytical fluency navigating analytics platforms, experimentation dashboards, and spreadsheet tools; Proven ability to audit an existing testing program, identify design flaws, and ship a better-instrumented experiment within the first week; Exceptional written and verbal communication skills; Proficiency with artificial intelligence tools in daily workflow; Demonstrated operator's discipline (shipping on time, quality assurance, clean naming conventions, thorough documentation); 2 to 4 years of hands-on experience for Experimentation Specialist, or 5 to 8+ years for Senior Experimentation Specialist in CRO, growth marketing, experimentation, or analytical marketing; Comfortable with SQL or direct data warehouse access (for Senior level); Ownership of end-to-end execution, strategic direction, and mentoring (for Senior level)

Nice to have

Experience within a consumer subscription, marketplace, or social platform environment where activation, retention, and customer lifetime value are primary growth levers; Familiarity with advanced statistical methods (Bayesian methods, multi-armed bandit approaches, adaptive experimentation); Background in behavioral economics or consumer psychology; Experience contributing to a company-wide experimentation program; Experience designing experiments around AI-driven personalization or recommendation systems; Bachelor's degree in Marketing, Business, Statistics, Economics, Mathematics, Computer Science, or related analytical field

Benefits

Subsidized health, vision, and dental plans; Paid sick leave; Retirement plans with a match; Free online training through Aquent Gymnasium