[TECH] Senior Data Scientist [GROWTH]Active

Work with HelloFresh in Warsaw and its HelloTech organisation, HelloFresh’s global technology backbone with more than 1000 people, building the digital products that power our end-to-end food experience. From meal kits and ready-to-eat meals to specialty offerings like pet food…

What they're looking for

• Partner with Engineering on system design so models integrate cleanly into: the funnel and messaging architecture — including where models decide, how decisions are served at latency, and how failures are handled and rolled back.
• Own experimentation design for decisioning models: define success metrics and guardrails, and interpret results in high-noise, high-traffic environments using rigorous methods (sequential testing / SPRT, propensity handling, allocation-bias-free setups).
• Keep models safe and effective in production: monitoring performance, input-data reliability, drift, and latency, and iterating quickly when issues surface.
• Collaborate with CRM Ops agent leads, Marketing Analytics, and platform: partners to turn model behaviuor into decisions marketers trust.