Staff Data Scientist (Trust & Safety)

Location: Amsterdam, Netherlands; hybrid model with 2 recommended office days per week. Remote work is permitted for up to 90 days per year in the EU, including 21 days globally; for non-EU citizens, 21 days worldwide.

Annual gross salary: €107,000–€144,800 EUR, excluding 8% holiday pay.

Company

hirify.global operates a second-hand marketplace connecting millions of members across more than 20 markets, alongside shipping and payment businesses.

What you will do

• Design end-to-end machine learning architecture for detection, risk scoring, routing, and decision-making.
• Develop cost-efficient layered inference strategies combining low-latency screening with deeper analysis.
• Establish continuous risk assessment across registration, listing creation, and ongoing member activity.
• Define end-to-end measures for detection effectiveness, including precision, coverage, missed harm, and computational cost.
• Integrate team-level models into a coherent, calibrated detection system and close detection coverage gaps.
• Set shared technical standards, prototype critical components, build reference implementations, and communicate trade-offs to senior technical and business leaders.

Requirements

• 8+ years of experience in Data Science, Machine Learning, or a similar role, including significant experience owning production models or model evaluation at scale.
• Experience leading cross-team technical work without formal authority and setting standards adopted by other teams.
• Deep expertise in statistical inference and experimentation, including A/B testing, precision and recall measurement under imperfect or biased labels, ground-truth sampling, and causal reasoning.
• Understanding of the production ML lifecycle, including evaluation, threshold setting, retraining, drift, feature stores, and monitoring.
• Hands-on experience evaluating LLM-based systems, or a strong interest in developing rigorous evaluation methods for them.
• High proficiency in SQL and Python and familiarity with a modern data stack such as BigQuery and dbt.
• Ability to turn cross-system problems into clear plans and explain trade-offs to technical and non-technical audiences, including senior leadership.
• Fluent English, written and spoken, is required.

Nice to have

• Experience in Trust & Safety, fraud prevention, content moderation, or risk management.

Culture & Benefits

• Hybrid work with flexibility to decide when to work from home and when to meet in person.
• 25 days of paid annual leave, work-from-home allowance, home office equipment support, and up to €540 for workplace furniture.
• Share options, pension plan, lunch benefit, hirify.global shopping budget, flexible benefits budget, and public transport support.
• Learning budget starting at €3,000 annually and up to 10 working days over two years for professional development.
• Employee Assistance Program, team-building events, dog-friendly office, and company bike leasing scheme.