Performance Marketer - Paid Media Immediate start, 3-5 month contract 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 Why Prolific is a great place to work We've built a unique platform that connects researchers and companies with a global pool of participants, enabling the collection of high-quality, ethically sourced human behavioral data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems. We believe that the next leap in AI capabilities won't come solely from scaling existing models but from integrating diverse human perspectives and behaviors into AI development. By providing this crucial human data infrastructure, Prolific is positioning itself at the forefront of the next wave of AI innovation—one that reflects the breadth and the best of humanity. Working for us will place you at the forefront of AI innovation, providing access to our unique human data platform and opportunities for groundbreaking research. Join us to enjoy a competitive salary, benefits, and remote working within our impactful, mission-driven culture. Links to more information on Prolific Benefits External Handbook Website Youtube Privacy Statement By submitting your application, you agree that Prolific may collect your personal data for recruiting and global organization planning. Prolific's Candidate Privacy Notice explains what personal information Prolific may process, where Prolific may process your personal information, its purposes for processing your personal information, and the rights you can exercise over Prolific use of your personal information.