{"id":2408110,"url":"https://alion.io/job/vinted-lead-decision-scientist-security-3","title":"Lead Decision Scientist, Security","company":{"id":56356,"name":"Vinted","domain":"vinted.com","url":"https://alion.io/company/vinted-com","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":82,"open_postings":34,"ghost_share":0,"stale_share":0.912,"repost_share":0,"time_to_fill_p50_days":18,"computed_at":"2026-10-20T05:45:00Z"}},"role":"Science & Research","role_family":"Science & Research","seniority":"lead","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Amsterdam, Netherlands"],"countries":["NL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":76000,"max_usd":166000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":9},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"A/B Testing","optional":false},{"name":"Python","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-10-02T10:36:39Z","employer_posted_date":"2026-10-02","last_verified_at":"2026-10-20T18:17:25Z","board_verified":true,"closed_at":null,"days_open":18,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":18},"description":"Brief info about Vinted \nOur mission is to make second-hand the first choice, and we're looking for people who want to help us get there. Every day, we work together to help our members buy and sell pre-loved clothing and lifestyle items, giving each piece a second life - or even a third.\nThe Vinted Group is made up of three business units that support this mission:\nVinted Marketplace is Europe’s leading platform for second-hand fashion and a go-to destination for all kinds of pre-loved items, with a growing range of categories. Our platform connects millions of members across 20+ markets, helping great items find a new life.\nVinted Go enhances the shipping experience with a vast network of over 500,000 pick-up and drop-off points, partnering with more than 60 carriers across Europe, with added services like item verification for peace of mind on high-value pieces.\nVinted Pay is the newest part of the Vinted Group, dedicated to bringing secure, reliable payments to buyers and sellers across Europe. Seamlessly integrated into the Vinted app, it helps keep every transaction safe, efficient, and easy for our members.\nFounded in 2008 in Lithuania, Vinted began as a way for friends to find new homes for clothes they no longer needed. In 2019, we became Lithuania's first unicorn! Today, our headquarters remain in Vilnius, and we've grown with offices across Europe, supported by a team of over 2,000 people. \nInformation about the position \nAt Vinted, the Security domain protects our marketplace across critical member touchpoints: Registration, Login, User Verification, Bot Prevention, and Authentication & Authorization. Every single member interacts with Security systems before making their first transaction.\nAs a Lead Decision Scientist in Security, you will serve as the senior technical lead responsible for bringing structure, clarity, and analytical rigor to some of our most critical trade-off decisions. While our Engineering and Data Science teams build defensive infrastructure and detection models, your focus will be entirely on measurement, evaluation, and decision frameworks.\nIn Security, every action comes with a trade-off: stopping malicious actors earlier prevents harm, but intervening too early or aggressively can frustrate or block legitimate members. Today, we have multiple restriction tools available-from verification challenges to account bans-and we need a clear framework to decide when and how to apply each one.\nYou will act as an autonomous strategic partner to Security leadership. You will own the analytical foundation for how we restrict malicious activity, quantify user friction versus harm prevention, and lead discovery on ambiguous, high-impact problems across the full user journey.\nIn this position, you’ll \n Build decision frameworks for user restrictions: Design the logic that determines which restriction measure to apply (such as verification challenges or account bans) based on user risk and context.\nBalance member friction against harm prevention: Quantify the trade-offs between stopping malicious actors early and keeping the onboarding experience seamless for genuine members.\nLead strategic cross-team discovery: Tackle open-ended questions across the user journey, such as analyzing duplicate/multiple account networks, assessing bot patterns, or evaluating third-party security tools versus in-house solutions.\nOwn domain metrics and impact measurement: Build and maintain the Security metric tree, guiding target-setting so product and business strategies are grounded in clear, measurable impact.\nRaise experimentation standards: Guide best practices in A/B testing and causal inference in complex environments where traditional experimentation isn't always straightforward.\nMentor and lead through influence: Coach embedded Decision Scientists across Security teams, foster a culture of open feedback and continuous learning, and elevate data literacy across the domain.\nAbout you \nProven analytical track record: Demonstrated experience in Decision Science, Product Analytics, Econometrics, or related quantitative fields, with a history of leading complex analytical projects as a senior individual contributor.\nDecision & trade-off frameworks: Solid experience designing metric systems and decision frameworks that balance competing objectives under ambiguity.\nExperimentation & causal inference: Strong practical foundation in A/B testing and causal inference.\nStructured problem solver: Comfortable taking open-ended, complex business challenges and translating them into clear, actionable analytical solutions.\nCollaboration & communication: Great communication skills - able to explain complex concepts simply, challenge assumptions constructively, and guide cross-functional stakeholders without needing formal authority.\nTechnical toolkit: Strong hands-on proficiency in SQL and Python or R for data analysis and modeling.\n Nice-to-have (not required): Previous experience in trust & safety, fraud prevention, risk assessment, cybersecurity, or two-sided marketplaces.\nStudies show that women and members of underrepresented communities often apply for jobs only if they meet 100% of the qualifications. If you don’t recognise yourself in all of the above, you might still be an excellent candidate for this position. If this role excites you, we encourage you to apply.\nWork perks \nThe opportunity to benefit from our share options programme\n25 days of paid annual leave\nNewest MacBook models\nConfidential Employee Assistance Program (EAP) for you and your family\nFrequent team-building events\nHome office support: we provide IT workstation equipment and a personal budget of up to €540 for home workplace furniture\nLunch benefit per working day\nA personal monthly budget for shopping on Vinted\nCollective Defined Contribution Pension plan\nNS Business Card for your commute to the office by public transport\nCompany bike leasing scheme\nMonthly budget for a flexible benefits platform\nWork from Home allowance\nA dog-friendly office\nWorking at Vinted \nWorkation policy \nBetter balance holidays with workdays by working remotely! Up to 90 days per year in the EU, of these, 21 days can be spent globally. For non-EU citizens, it's 21 days worldwide. This can be combined with time off for vacation or personal time.\nIndividual learning budget\nEach year, you’ll be given a learning budget (starting at €3,000), and a total of up to 10 working days over a 2-year period to support your personal and professional development.\nHybrid work\nOur hybrid model, with 2 recommended office days a week, gives you and your team the flexibility to decide if and when you want to work from home, and when to catch up in person.\nEqual opportunity\nWe welcome applications from everybody, regardless of your background, identity, or life experiences. Job openings come with guides, not checklists. If you’re excited about a role, but don’t identify with every point in the ‘About you’ section, apply anyway - you might still be the perfect match!\nThe annual gross salary range for this position excluding 8% holiday pay is:\n€86.600—€117.200 EUR","description_format":"text","description_chars":7118,"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":["Annual leave","Apple Macbook","Continuous learning","Home office","Hybrid work","Professional development","Stock options"],"hiring_locations":[{"name":"Netherlands","iso":"NL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Marketplaces","Apparel & Fashion Brands"],"lifecycle":[{"event":"open","at":"2026-10-13T01:24:02Z"}],"visa":[],"liveness":{"score":46,"band":"ok","label":"Likely open","p_open":1,"p_active":0.612,"p_room":0.75,"age_days":17,"expected_fill_days":18,"reasons":["conf:0","stale_co","wave","velocity","win:late","comp:brand"],"computed_at":"2026-10-20T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/vinted-lead-decision-scientist-security-3","json_url":"https://alion.io/job/vinted-lead-decision-scientist-security-3.json","meta":{"generated_at":"2026-10-20T21:54:06Z","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":25492,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-21T00:00:00Z"}},"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":56356},"rest":"https://alion.io/mcp/rest/get_company?id=56356"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fvinted-lead-decision-scientist-security-3"},{"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%2Fvinted-lead-decision-scientist-security-3"},{"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%2Fvinted-lead-decision-scientist-security-3"},{"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/vinted-lead-decision-scientist-security-3\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fvinted-lead-decision-scientist-security-3"}]}