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Senior Data Scientist for Personalization (f/m/d) - GER, UK, NL, PL

Standort flexibelDeutschland, Nordrhein-Westfalen, KölnProduct Development


is Germany's best-known AI company. We develop neural networks to help people work with language. With DeepL Translator, we have created the world's best machine translation system and made it available free of charge to everyone online. Over the next few years, we aim to make DeepL the world's leading language technology company.

Our goal is to overcome language barriers and bring cultures closer together.

What distinguishes us from other companies?

DeepL (formerly Linguee) was founded by developers and researchers. We focus on the development of new, exciting products, which is why we spend a lot of time actively researching the latest topics. We understand the challenges of developing new products and try to meet them with an agile and dynamic way of working. Our work culture is very open because we want our employees to feel comfortable. In our daily work we use modern technologies - not only to translate texts, but also to create the world's best dictionaries, and solve other language problems.

When we tell people about DeepL as an employer, reactions are overwhelmingly positive. Maybe it's because they have enjoyed our services, or maybe they just want to get on board with our quest to break down language barriers and facilitate communication.

Your Choice

We are constantly looking for outstanding employees! Currently, we offer remote work in Germany, the Netherlands, the UK and Poland. Whether you would like to work from home in one of these countries or from one of our offices in Cologne, London or Amsterdam: the choice is yours. No matter where you choose to work from, our way of working is designed to make you an essential part of the team.

What will you be doing at DeepL?

  • Be part of a growing team that is a cross-functional mix of Data Scientists, Data Analysts, and Data Engineers
  • Working on personalising the experience on DeepL to give the user the best experience on our platform
  • Building and designing innovative Machine Learning models and algorithms aiming to tailor the user’s experience on our platforms
  • Run A/B tests to quantify what impact your models have on user metrics and derive new hypothesis for future experiments
  • By doing so, you will make a significant impact on building the best possible translation experience and overcome language barrier

What will you be doing at DeepL?


Your responsibilities

  • Drive the Machine Learning development cycle for your models from end-to-end - from understand the underlaying data and business need, to building models and monitoring them in production
  • Implement Python and SQL code to put your ideas into models
  • Drive MLOps improvements and best practices to enable faster development and scaling, in strong collaborating with our Data Engineering team
  • Communicate progress and present results of your experiments internally
  • Consult with teams from Product to understand their mission, requirements and translate this into actionable modelling approaches
  • Support the Data Science community in DeepL with mentoring, reviews of new technologies or methods, and hiring
What we offer
  • Data at scale from products used by more than 100 million people worldwide
  • Interesting challenges: analytics and programming at the highest level
  • A team of engineers that maintains our Machine Learning infrastructure and supports you with technical expertise
  • Our own analytics and experimentation platform - far beyond the limitations of standard web analytics platforms
  • A friendly, international, and highly committed team with a lot of trust and very short decision-making processes
  • Meaningful work: we break down language barriers worldwide and bring different cultures closer together
  • A comfortable office in Cologne, Berlin, Amsterdam or London or suitable equipment for your home office
About you
  • You have 4+ years professional experience as a Data Scientist, Machine Learning Scientist or Engineer, ideally working with user data of a web product
  • Solid knowledge of Python and SQL
  • Experience with different ML packages and models in production is a must
  • Experience in a cross functional collaborative environment for the development of machine learning products (for example Data Engineers, ML Engineers, Product Managers, etc)
  • Well versed in statistics, in particular concepts in hypothesis testing or AB testing
  • You have a Master’s degree or PHD in a quantitative subject like physics, mathematics, statistics, data science, computer science or another field with a strong emphasis on quantitative analysis
  • The ability to transmit information concisely and clearly - whether written, spoken or visually
  • Practical experience with big data tools is a plus
  • Fluent in English, which is our company language
Standort flexibel
Product Development