{"id":3343761,"url":"https://alion.io/job/prolific-senior-data-analyst-marketplace","title":"Senior Data Analyst - Marketplace","company":{"id":30,"name":"Prolific","domain":"prolific.com","url":"https://alion.io/company/prolific","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":75,"open_postings":30,"ghost_share":0.333,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":61,"computed_at":"2026-10-28T05:59:10Z"}},"role":"Analytics","role_family":"Analytics","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom","United Kingdom"],"countries":["GB"],"hiring_countries":["GB"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":60000,"max_usd":117000,"period":"year","method":"role_seniority_country_cell","sample_n":75},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"A/B Testing","optional":false},{"name":"Python","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-10-27T16:28:36Z","employer_posted_date":"2026-10-27","last_verified_at":"2026-10-29T03:57:52Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":1},"description":"Senior Data Analyst, Marketplace\n\n Prolific\nProlific 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 commoditised, it's the quality and diversity of human-generated data that truly differentiates products and models.\nThe role\nAs Prolific scales, maintaining a healthy and sustainable marketplace will be critical to our ability to meet growing demand for high-quality human data. We are looking for a Senior Data Analyst to help us understand how well our marketplace is working, identify where supply and demand are not connecting effectively, and measure whether product and algorithmic improvements are delivering better outcomes. You will work closely with Product, Engineering and Operations teams, using data to answer important marketplace questions and support better product decisions.\nWhat you’ll bring to the role\nStrong Analytics Skills: Strong SQL skills and experience analysing complex datasets. Python experience for analysis and experimentation is beneficial.\nMarketplace or Product Analytics: Experience working with marketplace, product or operational data and using metrics to understand user and business behaviour.\nMarketplace Metrics: Ability to work with measures such as supply and demand, fill rate, time-to-fill, availability, quality and concentration to understand marketplace performance.\nExperimentation: Experience analysing A/B tests or other experiments, including defining success metrics, interpreting results and communicating findings.\nProduct Thinking: Ability to turn product or marketplace questions into measurable hypotheses and structured analysis.\nAnalytical Curiosity: Comfortable exploring data to understand why something is happening, rather than only reporting what happened.\nCommercial Awareness: Ability to understand how marketplace performance affects customer experience and wider business outcomes.\nCollaboration: Comfortable working with Product, Engineering and Operations teams and contributing analytical thinking to cross-functional work.\nClear Communication: Ability to translate analysis into simple, actionable insights for both technical and non-technical stakeholders.\nWhat you'll be doing\nHelp define, monitor and improve the metrics we use to understand marketplace health, including supply-demand balance, fulfilment, quality and concentration.\nAnalyse marketplace performance and investigate changes in metrics such as fill rate, time-to-fill, participant availability and quality.\nWork with product and engineering teams to define success metrics and measure the impact of product and algorithmic improvements.\nAnalyse experiments to understand whether changes to matching, ranking, recommendation or other marketplace experiences are improving outcomes.\nBuild and maintain dashboards and reporting that make marketplace performance visible and actionable.\nUse SQL and other analytical tools to investigate marketplace behaviour, identify trends and surface opportunities or problems.\nExplore how marketplace outcomes differ across customers, participants, use cases and segments.\nCommunicate findings clearly and help teams make data-informed product and operational decisions.\nWhy Prolific is a great place to work\nWe'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 behavioural data and feedback. This data is the cornerstone of developing more accurate, nuanced, and aligned AI systems.\nWe believe that the next leap in AI capabilities won't come solely from scaling existing models but from integrating diverse human perspectives and behaviours 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 breath and the best of humanity.\nWorking 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.\nLinks to more information on Prolific\nBenefits \nExternal Handbook \nWebsite \nYouTube \nPrivacy Statement\nBy submitting your application, you agree that Prolific may collect your personal data for recruiting and global organisation 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.","description_format":"text","description_chars":4815,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Marketplaces","Artificial Intelligence","LLM & Generative AI","AI Research Labs"],"lifecycle":[{"event":"open","at":"2026-10-27T16:32:56Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":61,"reasons":["conf:4","win:early"],"computed_at":"2026-10-28T05:59:10Z"},"pay":null,"html_url":"https://alion.io/job/prolific-senior-data-analyst-marketplace","json_url":"https://alion.io/job/prolific-senior-data-analyst-marketplace.json","meta":{"generated_at":"2026-10-29T04:32:24Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":7046,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-30T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":30},"rest":"https://alion.io/mcp/rest/get_company?id=30"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fprolific-senior-data-analyst-marketplace"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fprolific-senior-data-analyst-marketplace"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fprolific-senior-data-analyst-marketplace"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/prolific-senior-data-analyst-marketplace\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fprolific-senior-data-analyst-marketplace"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3343761}},{"tool":"search_jobs","arguments":{"company":"prolific.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3343761},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}