Paid Media / Performance Marketer, Prolific
3-5 Month Contract
High-quality human-powered data at scale
Job no longer available
High-quality human-powered data at scale
101-200 employees
Job no longer available
101-200 employees
Company mission
To accelerate human understanding.
Role
Who you are
- This is an execution-heavy role with strategic input—ideal for someone who enjoys building, testing, optimizing, and reporting on campaigns end-to-end
- 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 the job involves
- 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
- You'll 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
Our take
Founded in 2014, Prolific is a marketplace and data analysis company that provides researchers with a network of test participants. From eye-tracking to human-facing AI applications, Prolific’s network acts as both a recruiter for test participants and as a marketplace for researchers scientists to hire said participants.
Founded in 2014, it’s already used by the likes of Google, Stanford, Oxford and Kings College London Universities to test new AI products, providing “stress tests” for its clients. Prolific’s user base now counts over 2000 potential test subjects, whilst researchers leverage its network to launch surveys, tests and evaluation tasks every 2 minutes.
An indicator of Prolific’s success is maintaining of profitability for years after its initial Y Combinator investment. In 2024, it raised $32 million in Series A to maintain its healthy position. This funding will allow it to expand its operations.
Freddie
Company Specialist at Welcome to the Jungle
Insights
Company
Funding (1 round)
Jul 2023
$33.5m
Series A
Total funding: $33.5m
Company benefits
- Bank holiday swaps
- Enhanced sick pay
- L&D budget – £1000 per year
- 25 days annual leave + bank holidays
Company values
- We win together
- We care deeply about our customers
- We make every minute count
- We're optimistic and find a way
- We embrace change
- We aim high
Company HQ
Kings Cross, London, UK
Leadership
Phelim Bradley
(Co-Founder & CEO)Currently also Venture Partner at Pioneer Fund. Previously Dphil at Wellcome Trust Centre for Human Genetics, Bioinformatics Intern at Illumina and MPhil of Computer Biology at University of Cambridge.
Diversity, Equity & Inclusion at Prolific
- At Prolific, we want all of our employees, researchers, and participants to be included and so we commit to having ongoing discussions about diversity and inclusion and regularly look at areas where we can improve. This policy aims to: - treat all our employees fairly and respectfully, regardless of their job status, location, or work hours ⏰ - avoid any illegal discrimination based on age, disability, gender, gender identity, marriage or civil partnership, pregnancy and maternity, race or ethnicity, religion or belief, sexual orientation, and traveler status. These are protected by the UK Equality Act (2010), Ireland Employment Equality Act (2004), Americans with Disabilities Act (ADA) at the federal level and the New York State Human Rights Law (NYSHRL) at the state level. ⚖️ - refuse to tolerate any kind of illegal discrimination 🙅🏻♀️. This includes pay and benefits, work conditions, grievance and discipline handling, termination, redundancy, parental leave, flexible working requests, employment selection, promotion, training, and other opportunities for development.
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