Senior ML Product Engineer — AI-Driven Growth

HelloFresh; Warszawa; On-site; PLN 300,000 - 550,000; Full time

Benefits offered by this job

Global collaboration

Real-world impact technology

Leadership opportunities

End-to-end development

Warsaw workspace

Job summary

HelloFresh Warsaw hosts a Senior Machine Learning Product Engineer within HelloTech to shape the intelligence behind customer communications. You’ll focus on decisioning, intelligent funnels, and AI-assisted content and search to improve engagement and personalization at scale.

You will work with Python, Spark, and a modern tech stack across production ML systems, collaborating with data scientists and cross-functional teams to ship robust ML solutions that impact millions of customers monthly.

Qualifications

• Hands-on experience with AI tooling beyond casual experimentation.
• Deep data/ML engineering expertise with production systems.
• 5+ years building and operating production ML systems.
• Fluency across the data and ML stack (Python, Spark, Databricks) and back-end familiarity (Go, Kafka, Kubernetes).
• Statistical literacy to design honest experiments and interpret results.
• Operational judgment to diagnose system issues under load and deploy fixes.
• You take full ownership and ship with a bias to learn.

Responsibilities

• Own & elevate ML infrastructure: maintain core repos, tooling, and workflows for scalable ML deployments.
• Build and operate data products and ML systems from experimentation to production.
• Architect the Send Decisioning data layer and integrate feature stores for quality data.
• Engineer AI-assisted content & asset systems to streamline marketing assets.
• Build production-grade pipelines and serving layers with observability and reliability.
• Bridge research and production by transitioning models with low latency.
• Set ML engineering standards: repositories, CI/CD templates, and platform practices.

Skills

AI tooling

ML engineering

Production systems

Product sense

Ownership

Statistical literacy

Operational judgment

Tools

Python

Spark

Databricks

Go

Kafka

Kubernetes

Job description

HelloFresh Warsaw hosts a Senior Machine Learning Product Engineer within HelloTech to shape the intelligence behind customer communications. You’ll focus on decisioning, intelligent funnels, and AI-assisted content and search to improve engagement and personalization at scale.

You will work with Python, Spark, and a modern tech stack across production ML systems, collaborating with data scientists and cross-functional teams to ship robust ML solutions that impact millions of customers monthly.