Junior Data Scientist

At Sunweb Group
, we’re passionate about creating unforgettable holiday experiences. As a Junior Data Scientist
, you’ll be part of a small but experienced team, working at the intersection of business impact and machine learning. You’ll develop and deploy operational Machine Learning models that directly support and optimize all areas of our business – from pricing and personalization to forecasting and marketing.

Our models don’t just stay in notebooks. At Sunweb, your code runs in production without manual interference – delivering real value in real time. You’ll work in a supportive and flexible environment with the freedom to take ownership of your projects, while having access to experienced colleagues when you need it. Your contributions will help thousands of travelers enjoy seamless, personalized holiday experiences powered by your models.

Location: Rotterdam (Hybrid – 50% in office)

Start Date: Mid September / Beginning of October 2026

Availability: Fulltime

Reports to: Head of Data Science

This position is well-suited for candidates who have recently completed their Master's degree or are at the beginning of their professional career in Data Science.

As a Junior Data Scientist, you'll spend your time not only developing models and working with data, but also collaborating closely with stakeholders across the business. Success in this role requires curiosity, strong communication skills, and the ability to build relationships with colleagues from different departments. You'll work together with teams such as Pricing, Marketing, Product, and Commercial to understand business challenges and translate them into data-driven solutions.

In this versatile role, you’ll work hands‑on with data, create and implement ML models, communicate your findings to stakeholders, and develop the tools and dashboards that bring your insights to life.

Expect to make an impact across diverse domains, including:

• Dynamic Pricing
• Personalization
• Demand Forecasting
• Media Mix Modelling

• Design, test, and deploy scalable Machine Learning models
  .
• Perform data analysis and build data pipelines.
• Translate results into clear insights through dashboards and presentations.
• Support your models in production – from functional queries to technical troubleshooting.
• Explore new ideas and continuously improve existing solutions.

• You recently completed a MSc degree in Data Science, Computer Science, Econometrics, Mathematics, Artificial Intelligence, or a related quantitative field at a Dutch university.
• You are legally authorized to work in the Netherlands without sponsorship.
• You are passionate about turning data into practical business solutions and are eager to see your models running in production.
• You enjoy working with people just as much as working with data. You are a social, approachable, and proactive communicator who knows how to connect with stakeholders across different departments.
• You are curious, analytical, and not afraid to ask questions to fully understand a business challenge.
• You can translate complex findings into clear insights and recommendations for non-technical audiences.
• You are comfortable balancing longer-term projects with ad-hoc business requests.
• You have strong communication skills in English.
  Dutch language skills are preferred but not required.
• Experience with Python, R, SQL, Power BI, Databricks, Big Query and/or Microsoft Azure is a strong advantage.

• Monthly gross salary between €3500 and €4000 plus 6 ATV days (based on full-time employment, excluding 8% holiday allowance).
  
  Please note:
  
  ATV days do not apply to part-time contracts.
• Enjoy up to 20% off when booking with our brands for you, your family, and your friends.
• As an international company we support a hybrid way of working. We provide you with office furniture and IT equipment.
• We enjoy the journey so enjoy 25 holidays based on fulltime employment.
• Access to a personalized Reflect & Develop Plan to support your career growth.
• Opportunities to grow into senior or specialist roles.
• Benefit from coaching sessions designed to support your well-being.
• Receive…