Senior Staff Machine Learning Engineer, Menu Personalisation
HelloFresh3 months ago
Warsaw, PolandStaff+
Responsibilities
- Set technical direction and own the end-to-end ML systems for menu personalization, including feature pipelines, training workflows, model serving, experimentation tooling, and infrastructure.
- Take research and experiments into reliable production services that meet latency, scalability, and observability requirements.
- Shape the personalization roadmap with Product and Engineering leadership using data and user evidence.
- Operate, instrument, and continuously improve production systems.
- Establish long-term architecture and make platform decisions with multi-year impact.
- Raise engineering standards through architecture reviews, mentorship, and hands-on production ML practices.
- Drive engineering excellence and ML/data engineering standards across HelloFresh.
- Collaborate with peers and contribute to company-wide engineering initiatives.
Requirements
- At least 8 years of experience building and operating production ML systems with a record of technical leadership at scale.
- Experience making durable architectural decisions that influence teams beyond the immediate team.
- Production recommender systems or large-scale personalization experience is strongly preferred.
- Fluency with Python, Spark, Go, Kafka, and Kubernetes, with hands-on experience across pipelines, model serving, and observability at scale.
- Statistical literacy for designing reliable experiments and evaluating model performance accurately.
- Operational judgment for diagnosing system behavior, finding root causes, and debugging systems under real load.
- Hands-on experience with Claude Code, Cursor, and Copilot, including daily use of AI agents.
- Strong product sense and the ability to connect technical decisions to evidence and business value.
- Bias toward shipping, full ownership, and completing work through production.
Tech Stack
Categories
About HelloFresh
HelloFresh builds subscription meal kits for households, delivering pre-portioned ingredients and recipes to cook at home. The company sells direct-to-consumer across North America, Europe, and Australia under multiple brands, with revenue from recurring subscriptions and add-ons like market items. Founded in 2011 and headquartered in Berlin, HelloFresh is a public company listed in Germany (ETR) and operates its own fulfillment and last-mile logistics.