Senior Data Scientist, Conversions Tribe, Growth Alliance (m/f/d)

About the role: What's in the Box

The Conversions Tech area enables meal brands to achieve ambitious growth targets through a seamless, high-performing conversion funnel. As part of the Growth Alliance, the project supports growth through advanced MarTech capabilities and product innovation, with a focus on (re)acquisition, conversion optimization, and data-driven growth strategies.

As a Senior Data Scientist within Conversions, you will shape the intelligence that drives customized user journeys across conversion funnels. You will execute complex feature engineering and optimization efforts and contribute to the data foundations and analytical approaches powering a decisioning platform for personalized experiences.

Your work will enable an automated engine that determines the optimal journey for each user at the right time, based on intent, channel, and campaign context. You will work cross-functionally with Product, Engineering, and Marketing to design, evaluate, and scale personalization across workstreams, advancing data strategy and user experience across global markets.

What you'll do: The Recipe

• Build and iterate on machine-learning models powering personalization in production behind high-traffic, performance-critical conversion pages.
• Execute decisioning models that determine the best next step in the conversion funnel for each user.
• Contribute to system design with Engineering to ensure data-science solutions integrate cleanly into the funnel architecture.
• Work with Product and Engineering to embed ML-driven decisions into conversion funnels, including model decision points and failure handling.
• Lead experimentation design for decisioning models, defining success metrics, guardrails, and result interpretation in high-noise, high-traffic environments.
• Monitor model performance, input-data reliability, and latency in production; iterate when issues are detected.

What you'll bring: The Ingredients

• 5+ years of professional experience in data science or a related quantitative field.
• Strong foundation in machine-learning concepts relevant to personalization and marketing communications.
• Hands-on experience with regression, classification, clustering, recommendation systems, and experimentation.
• Practical experience designing and analyzing A/B tests and controlled experiments.
• Experience working with customer behavior data and segmentation.
• Extensive experience operating in production environments and collaborating closely with engineers.
• Clear, structured communication skills and a collaborative mindset.

What we offer: The Toppings

• Global collaboration with experienced engineers and product partners across international teams, with active knowledge sharing.
• Opportunity to build and operate modern systems at global scale, supporting 6+ million customers and complex supply-chain operations.
• Technical, product, and design leadership opportunities to influence architecture, design, quality, and ways of working in an autonomous, product-led setup.
• End-to-end ownership from problem definition through production, improving systems and enabling long-term scalability.
• Access to a workspace at Warsaw Centre Point, with modern facilities including showers, breakout zones, outdoor space, cycle parking, and refreshments.