The Conversions Tech area enables meal brands to achieve ambitious growth targets through a seamless and high-performing conversion funnel. As a component of the Growth Alliance, this project drives growth for the HelloFresh group by powering marketing with advanced MarTech capabilities and product innovation. The focus is directed toward (re)acquisition, conversion optimization, and data-driven growth strategies.
In the capacity of a Staff Data Scientist within Conversions, the service provider contributes to shaping the intelligence that drives customized user journeys across conversion funnels. This involves directing complex feature engineering and optimization efforts, designing the data foundations and analytical approaches that power the decisioning platform for personalized experiences.
These services enable an automated engine to determine the optimal journey for a specific user at the appropriate time, based on intent, channel, and campaign context. Execution occurs at a strategic level, influencing how personalization is designed, evaluated, and scaled across various workstreams. This project carries direct accountability for advancing the data strategy and improving the user experience for the HelloFresh group across global markets.
responsibilities :
What you’ll do: The Recipe
Decisioning, Modeling & Strategy
Define and evolve data and modeling strategy for personalized journeys and funnel decisioning.
Develop feature engineering approaches to improve decision quality, robustness, and scalability.
Design and evaluate machine learning methods for personalization and routing.
Set standards for model validation, monitoring, and experimentation.
Technical Coordination & Strategy
Support Product, Engineering, and Marketing teams in embedding decisioning capabilities into customer experiences.
Align workstreams on personalization measurement, iteration, and scaling.
Support roadmap prioritization using data-driven trade-off analysis.
Contribute to build vs. buy evaluations for data science platforms and tooling.
Platform & Enablement
Design shared decisioning frameworks and reusable data products.
Ensure analytical solutions are production-ready, observable, and efficient to maintain.
Provide technical guidance on analytical implementation.
AI & Automation
Collaborate with engineering teams on production deployment of models.
Explore AI and automation solutions to improve decision quality and experimentation efficiency.
requirements-expected :
A minimum of 10 years of professional experience with a Masters degree, or a minimum of 5 years of professional experience with a Ph.D. degree, in a quantitative field.
Demonstrated expertise in data science, with a strong emphasis on personalization and marketing communications.
Deep understanding of machine learning principles and techniques relevant to send personalization and content creation including regression, classification, recommendation systems, clustering, natural language processing, and multi-armed / contextual bandit algorithms.
Proven ability to solve complex optimization problems that involve a large number of dimensions and optimization targets.
Proven ability to design and interpret A/B tests and quasi-experiments with synthetic controls to validate hypotheses related to the personalized communication strategy stream.
Exceptional communication and collaboration capabilities.
Experience with customer behavior analysis, segmentation, and identifying high-value actions to drive customer lifetime value.
Experience in leveraging Generative AI (GenAI) models (e.g., LLMs) for content generation, including prompt engineering, model evaluation, and fine-tuning to create engaging and personalized customer communications.
Above all, we are looking for individuals who will make HelloFresh better. We believe there are many different ways of developing skills and we love diverse experiences! So even if you don’t “tick all the boxes” but think you’d thrive in this role, we would really like to learn more about you.
offered :
The Toppings
Global collaboration at scale: Collaborate with experienced engineers and product partners across HelloTech’s international teams, in a culture of active knowledge sharing.
Technology with real-world impact: Build and operate modern systems at global scale, supporting 6+ millions of customers and complex supply chain operations.
Technical/Product/Design leadership: Drive best practices and influence architecture/design, quality, and ways of working in an autonomous, product-led setup.
End-to-end development/delivery: Drive decisions from problem definition to production, improving systems and enabling long-term scalability.
Access to workspace at Warsaw Centre Point. The hub offers modern facilities including showers, breakout zones, outdoor space, cycle parking, and refreshments (coffee, soft drinks, and fruit).
Are you the missing ingredient? If this sounds like a tasty opportunity, we’d be excited to hear from you. We aim to review your profile and respond within 5 business days.
