Senior Machine Learning Engineer [GROWTH]
HelloFresh2 months ago
Warsaw, PolandSenior
Responsibilities
- Build, maintain, and improve ML repositories, developer tooling, and workflows for scaling and deploying production ML systems.
- Evaluate and optimize the communication platform data layer and integrate the feature store for decisioning models.
- Develop scalable systems for email copy generation and context-driven image and asset retrieval.
- Build low-latency, reliable production pipelines and serving layers with observability, data reliability, and error handling.
- Partner with Data Scientists to transition experimental models into resilient production services.
- Standardize ML engineering practices, core repositories, CI/CD templates, and ML platform workflows using Databricks and MLflow.
- Monitor and scale production ML infrastructure, including input data quality, model drift, latency, and reliability.
Requirements
- Ideally 5+ years of experience building and operating production ML systems.
- Fluency with Python, Spark, and Databricks, plus working knowledge of Go, Kafka, and Kubernetes.
- Hands-on experience with data pipelines, model serving, and observability at scale.
- Statistical literacy for designing experiments and accurately evaluating model metrics.
- Operational judgment for diagnosing production issues, identifying root causes, and deploying robust fixes.
- Hands-on experience using Claude Code, Cursor, and Copilot in a regular technical workflow.
- Product sense and the ability to connect technical initiatives to business value.
- Strong ownership and willingness to complete final implementation and delivery phases.
- Candidates with diverse experience are encouraged to apply even if they do not meet every listed qualification.
Benefits
- Global collaboration with international engineering and product teams.
- Opportunity to build and operate systems supporting more than 6 million customers at global scale.
- Ability to influence technical and product leadership, architecture, quality, and ways of working.
- End-to-end ownership from problem definition through production delivery.
- Access to the Warsaw centre at Prosta 20, with showers, breakout zones, outdoor space, cycle parking, coffee, soft drinks, and fruit.
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.