Senior Data Scientist - Product Insights (GenAI)

Location: Lisbon, Portugal; candidates must currently reside in Portugal. Hybrid work with a minimum of two days per week in the office.

Company

Online marketplace for buying and selling curated special objects, with more than 100,000 items auctioned weekly and over 25 million objects sold.

What you will do

• Own analytics for a broad product area, such as buyer-facing features, seller experiences, or order fulfilment.
• Partner with Product stakeholders to identify user journey opportunities and understand user behaviour.
• Define success metrics, uncover trends, and translate data into recommendations, dashboards, and reports.
• Design and analyse A/B tests, regression models, causal inference studies, and other experiments.
• Define offline benchmarks and online measurement for GenAI-powered features, including quality, performance, drift, and user impact.
• Combine data from multiple sources and improve the reliability of data pipelines and self-service analytics.

Requirements

• 6+ years of experience in data science or analytics, preferably in an online company.
• Strong quantitative background and experience owning complex projects with measurable product impact.
• Advanced SQL and programming skills in Python, R, or another programming language.
• Experience working with large datasets, data pipelines, dashboards, and transformation tools such as dbt or Dataform.
• Deep statistical expertise, including regression analysis, causal inference, time series modelling, and hypothesis testing.
• Experience with Google Analytics, Google Tag Manager, experimentation, stakeholder communication, and mentoring.

Nice to have

• Experience in an online marketplace or similar product environment.
• Experience with Looker Studio, Tableau, or Power BI.

Culture & Benefits

• Work on products serving millions of customers across more than 80 categories.
• Learning and Development initiatives, development plans, and mentorship programmes.
• Inclusive, diverse, and queer-friendly workplace with colleagues representing more than 60 nationalities.
• Hybrid offices in Lisbon and Amsterdam designed for collaboration.
• €100 Catavoucher on joining, €50 Catavoucher on birthdays, an additional annual day off, and extra leave for work anniversaries and important life events; benefits may vary by location.

Hiring process

• Apply with an English CV and cover letter.