Paid Media / Performance Marketer

Performance Marketer - Paid Media Immediate start, 3-5 month contract, 3 days a week Location: London, UK Prolific Prolific is not just another player in the AI space—we are the architects of the human data infrastructure that's reshaping the landscape of AI development. In a world where foundational AI technologies are increasingly commoditized, it's the quality and diversity of human-generated data that truly differentiates products and models. The role We’re looking for an immediately available, experienced Paid Media / Performance Marketing Freelancer in the UK ONLY to help us scale and optimize our paid media initiatives across Prolific for Research. This role will own hands-on execution across multiple paid channels while providing clear performance insights and recommendations. This is an execution-heavy role with strategic input—ideal for someone who enjoys building, testing, optimizing, and reporting on campaigns end-to-end. What you’ll bring to the role: - Proven experience managing paid media campaigns for B2B products (SaaS, marketplaces, or platforms preferred) - Strong hands-on experience with: LinkedIn, Influ2, Hubspot, Meta and other relevant channels - Familiarity with marketing automation and CRM tools - Experience with content syndication and lead-gen focused paid campaigns - Strong analytical skills and confidence working with performance data and reporting tools - Comfortable owning campaigns end-to-end without heavy oversight - Experience running experiments and structured testing roadmaps - Ability to clearly explain performance, insights, and recommendations to non-specialists - Experience working as a freelancer or contractor with fast-moving teams What you’ll be doing in the role: - Set up, manage, and optimise paid media campaigns across multiple channels, including: Paid search, LinkedIn Ads, Influ2, Meta, other paid social or advertising placements as relevant, content syndication partners and platforms - Develop and refine audience targeting strategies (B2B, research, academic, AI and commercial segments) - Manage campaign structure, bidding strategies, budgets, and creative testing - Collaborate with internal stakeholders on messaging, positioning, and landing page optimisation - Monitor performance daily and optimise for key metrics (CPL, CAC, conversion rates, ROI) - Produce clear, actionable performance reporting (weekly/monthly) - Conduct channel analysis to identify scale opportunities, inefficiencies, and new tests - Recommend new paid channels, formats, or placements based on performance insights - Ensure tracking, attribution, and measurement are set up correctly.