Senior Data Scientist (m/f/d)

Warsaw·Posted today

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At Flix, we offer a dynamic work environment with competitive pay, strong growth opportunities, and a tech-driven approach to making travel more accessible, sustainable, and affordable.   As a Senior Data Scientist n our Commercial & Marketing Intelligence team at Flix, you can make an impact by owning and evolving our causal measurement practice — designing and running experiments that directly shape how we allocate our global marketing budget. You will work closely with a dedicated team across Marketing & Sales, Revenue Management, Reporting, and Engineering to ensure our incrementality evidence drives smarter, more transparent choices at scale. About the Role <ul> <li style="font-family: helvetica, arial, sans-serif; font-size: 12pt;">Own the design, execution, and continuous improvement of geo-based, time-based, and synthetic control experiment frameworks, ensuring methodological rigour and scalability across global markets and channels</li> <li style="font-family: helvetica, arial, sans-serif; font-size: 12pt;">Apply econometric and causal inference techniques — including difference-in-differences, synthetic control, and Bayesian structural time series — to measure the true incremental effect of marketing activities on bookings and revenue</li> <li style="font-family: helvetica, arial, sans-serif; font-size: 12pt;">Build and manage a structured test-and-learn programme across paid channels, identifying measurement gaps and prioritising experiments by expected business value</li> <li style="font-family: helvetica, arial, sans-serif; font-size: 12pt;">Contribute to the development and validation of attribution models (CLV-MTA and MMM), providing reliable benchmarks that reduce reliance on platform self-reported data</li> <li style="font-family: helvetica, arial, sans-serif; font-size: 12pt;">Translate complex causal findings into clear, actionable recommendations for a wide range of stakeholders including marketing teams, finance, and senior management</li> <li style="font-family: helvetica, arial, sans-serif; font-size: 12pt;">Review experiment designs, create thorough documentation, and help shape internal standards for how Flix measures marketing effectiveness across all channels</li> </ul> About You <ul> <li style="font-size: 12pt;">Holds a Master's or PhD in Statistics, Econometrics, Applied Mathematics, Data Science, or a related quantitative field</li> <li style="font-size: 12pt;">Brings 5+ years of experience in a data science or quantitative research role, with hands-on expertise in designing and evaluating causal experiments such as geo experiments, time-series holdouts, or synthetic control studies</li> <li style="font-size: 12pt;">Demonstrate strong command of causal inference methods including difference-in-differences, synthetic control, Bayesian structural time series, or matched market testing</li> <li style="font-size: 12pt;">Proficient in Python,SQL, Power BI and experienced with statistical modelling libraries such as statsmodels, PyMC, CausalImpact, or equivalent tools</li> <li style="font-size: 12pt;">Comfortable with version control (Git), reproducible workflows, and cloud or data warehouse environments such as BigQuery or Snowflake</li> <li style="font-size: 12pt;">Proven ability to present statistical findings to non-technical audiences and contribute to strategic choices with data</li> <li style="font-size: 12pt;">Experience in marketing measurement, media mix modelling, or growth reporting is a plus — as is familiarity with Bayesian methods</li> </ul> We recognize that everyone carries a unique set of valuable skills and experiences. If you think you could have an impact even though you don't meet 100% of the requirements, we still encourage you to apply. We want to hear from you!   What We Offer <ul> <li data-renderer-start-pos="11445">Travel perks: 12 free Flix vouchers + 12 discount vouchers for friends & family. </li> <li data-renderer-start-pos="11530">Work from (M)Anywhere: Depending on your role, work from another location for up to 60 days per year. </li> <li data-renderer-start-pos="11636">Hybrid work model: We are an office-first company, but we offer flexibility to balance work and life. </li> <li data-renderer-start-pos="11742">Wellbeing support: Access confidential 1:1 counselling, courses, and stress management for yourself and up to four family members. </li> <li data-renderer-start-pos="11877">Learning & Development: Take advantage of language classes, training courses, and expert-led sessions to grow your skills. </li> <li data-renderer-start-pos="12004">Mentoring Program: Connect with experienced colleagues to gain insights and accelerate your career. </li> </ul> To view more local benefits specific to each office location, please check out this link: <a href="https://flix.careers/locations/">Locations - Flix Career</a> <hr> Why Join Flix? At Flix, you’ll find teams that rally together to overcome challenges and spark creativity. We believe in ownership culture - giving you the freedom to take initiative, make an impact, and shape your own career path. As we continue to expand across the globe, you can make a real difference in how we work. If you’re ready to grow and lead your journey, Flix is the place for you!  <iframe src="https://www.youtube.com/embed/YlHz7TiiRAw" width="560" height="314"></iframe>

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