Senior Data Scientist

Want to be a hero? - Join the #1 Global Leader in online food ordering and delivery

We are looking for a **Senior Data Scientist** (f/m/d) to join our Customer Data Platform in Global Data. Our cross-functional team develops machine learning solutions to unify the view of our customers via an identity resolution service.

The Squad that you’ll be joining delivers a global identity resolution and account associations service that powers important downstream use cases such as promo and identity fraud prevention. It consists of specialized data scientists, engineers, product managers, and graph analytics experts working to unify accounts, reveal associations between accounts, and limit fraud.

We drive value by helping Delivery Hero's businesses, systems, and people make better decisions faster at scale. We want to attract and train world-class data scientists, and engineers and build a group that provides you with the most productive and challenging time of your career.

**Your mission**:

- Build and own end-to-end products with a high impact on our core business and operations at the scale of millions of orders on a daily basis.
- Explore semi-supervised (TabNet), unsupervised learning (Isolation Forest, VAEs, GMM), and other well-established supervised (XGBoost, CatBoost, LightGBM) algorithms as well as Graph Neural Networks (dgl).
- Use a graph database (Amazon Neptune) to extract insights using a path-oriented query language (gremlin) and build advanced ML models on top.
- Implement metrics that capture the performance of your algorithms to improve our core business cases.
- Use your coding and data processing magic skills to lift heavy volumes of data.
- Collaborate with cross-functional teams to ensure high-quality data is available for high performing data products to be built, which you will design, develop and deploy.
- Communicate complex concepts and the results of the analyses in a clear and effective manner through creative visualization.

**Your Heroic skills**:

- Experience with scientific work in your Bachelor/Master in Mathematics, Statistics, Data Science, Physics, Computer Science, Telecommunications or equivalent.
- Strong experience (5+ years) designing, building and deploying machine learning models at scale.
- Proven experience (4+ years) using Python and its scientific stack (Sklearn, Keras, PyTorch, MXNet, Pandas, Numpy).
- Graph Theory knowledge and high interest in Graph Databases and graph ML algorithms, i.e. Amazon Neptune, Gremlin, Neo4J, NeptuneML, graph neural network, networkx,
- Proven experience working with Cloud Technologies and data platform technologies (GCP, AWS, BigQuery, Airflow).
- Advance knowledge of SQL and ability to visualize data in an easily understandable way to stakeholders or non-technical people.
- You are a team player who loves to collaborate and work with stakeholders from different backgrounds in an international environment.
- You believe that diversity and inclusion is core value and vital for success.

**Nice to have**:

- Experience with container technologies (Docker, AWS ECR) and CI pipelines (GitHub Actions, Travis).
- Experience in the resolution of customer or users identity is a plus.
- Experience with graph query or graph algorithms is a plus.

**Why Delivery Hero?**
- Exchange ideas and meet fellow data scientists in our regular meetups, in our active guilds and through our global tech & product community.
- We offer visa & relocation support globally to our permanent employees.
- Enjoy our free online yoga classes and a subsidized Urban Sports Club or Gympass membership.
- Take care of your mental and emotional well-being with our free Headspace subscription and unlimited access to our Employee Assistance Program.
- Participate in our health campaigns such as seasonal flu vaccines.
- Benefit from BVG subsidy or join our Bike rental program.
- Join the global market leader and a publicly listed company with a competitive remuneration package.
- Develop your skills with your personal educational budget for conferences and external trainings.
- Access our e-learning platform MyAcademy, participate in our various inhouse trainings, and learn German in our free classes.
- Save responsibly with our attractive corporate pension scheme.
- Join company parties, team, cultural and sports events - due to the current situation on a virtual basis.

**About us**:
Delivery Hero Tech is playing an exceptional role in the large growth of our company. Our Tech teams leverage a diverse stack to create cutting-edge solutions which cover the full customer experience - starting with a great online search experience and ending with a real-time delivery at your doorstep.

Read about the latest updates from our Tech & Product teams on our blog.

Delivery Hero is building the next generation global on-demand delivery platform. We have grown rapidly from inception in 2011 to become the world's largest food-ordering network and we’re now innovating and creati