ML Engineer - with Data Science Background (d/f/m)
Personio is growing rapidly. With that growth comes the increasing demand for machine learning solutions that don't just provide insights, but power real, production-ready products.
As an ML Engineer, you will play a pivotal role in shaping Personio's AI and ML capabilities. We are looking for someone who can build high-quality ML systems with the rigor of an engineer, while also bringing the curiosity and experimentation mindset of a data scientist. Your work will involve productionizing ML and generative AI models, ensuring they deliver measurable business impact.
You'll join our central AI/ML function, collaborating across departments to drive innovation and enable AI-driven decision-making at scale.
What you'll do
- Design, develop, and deploy robust machine learning and AI systems for a range of business use cases, including generative AI.
- Build and operationalize ML solutions to address business challenges and unlock new opportunities.
- Integrate ML and AI models into production systems, ensuring scalability, reliability, and maintainability.
- Deploy and monitor MLOps workflows, including CI/CD pipelines, automated testing, monitoring, and model versioning.
- Leverage cloud platforms (AWS + Snowflake) and ML infrastructure (e.g., SageMaker, feature stores) for scalable deployment.
- Collaborate with cross-functional teams (Product, Sales, Marketing, etc.) to deliver AI-driven features and insights.
- Ensure all ML/AI solutions adhere to best practices in data privacy, security, and ethical standards.
- Contribute to a culture of technical excellence, knowledge sharing, and continuous learning.
What you need to succeed
- University degree in Computer Science, Machine Learning, Data Science, or a related field.
- 5+ years' experience building and deploying production-grade machine learning models.
- Strong software engineering mindset - ability to write clean, reusable, and scalable code in Python.
- Experience integrating ML/AI models into production software systems.
- Solid understanding of MLOps practices, CI/CD pipelines, and automated testing frameworks.
- Background in data science: comfort with experimentation, A/B testing, and measuring ROI/impact of ML projects (not just accuracy).
- Hands-on experience with ML frameworks (e.g., TensorFlow, PyTorch, Hugging Face).
- Experience with NLP or generative AI techniques is a strong plus.
Familiarity with cloud-based ML infrastructure (AWS, Snowflake, SageMaker, etc.).
Why this role?
- Join a newly created AI sprint team focused exclusively on delivering LLM and ML-powered projects with real business impact.
- Work in a lean, well-supported environment (dedicated TPM, analytics engineer, and data platform support - no need to build ingestion pipelines).
- Full ownership of end-to-end ML delivery: from prototype to production.
- Exposure to high-impact use cases (e.g., automating marketing campaigns, personalization engines) backed by executive sponsorship.
- A chance to bridge the gap between data science and engineering, bringing cutting-edge AI into production at scale.
Why Personio?
We're one of Europe's fastest-growing tech companies, building the leading HR platform for SMEs. With over 15,000 customers, offices across Europe, and strong backing from top-tier investors, Personio is scaling fast - and AI is a critical enabler of that growth.
We're also proud of our culture:
- A diverse, inclusive workplace where your voice matters.
- Competitive compensation, equity, and benefits.
28 days' vacation, plus an additional day after two and four years. - Flexible, office-led but remote-friendly working with the option for international work weeks.
- Mental health support, family leave, Impact Days, sabbaticals, and regular team events.
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What We Do
We believe small and medium-sized organizations are the backbone of global economies, and their most valuable asset is the people they employ. But many of their HR teams are held back by complicated, time-consuming processes and admin. We’re changing that with our all-in-one HR solution that transforms the way millions of people experience work every day.
At the core of our people-focused product are the individuals who craft it: We proudly identify as Personios. As we build on our success as Europe’s leading HR platform for SMEs, we are looking for the brightest minds to bring their own innovative ideas to the table. When you join our team of 1800+ across Europe and the US, you’ll have an impact from day one – for our 15,000 customers and the 1.5 million employees we serve.
Why Work With Us
Personio is one of the most valuable tech startups in Europe, but we're just getting started with revolutionizing HR for the 1.7 million small and medium-sized organizations still stuck in the spreadsheet era. Now we need your experience scaling tech companies to take us to the next level.
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