For our Vattenfall Business Area Wind Business Unit Solar & Batteries we are now looking for a

Working Student – Battery Engineering & Data Analytics (f/m/d)

for our office in Hamburg .

Our Battery Engineering Circle is at the forefront of developing and operating cutting-edge Battery Energy Storage Systems (BESS) across Europe. As a self-organized, interdisciplinary team, we combine innovation, data, and engineering to shape the energy transition.

Key responsibilities and duties

As a working student, you will support our team in managing and analyzing battery asset data to improve performance and reliability. Your main tasks will include:

• Data Analysis & Visualization: Analyze large datasets from battery systems using Python and MATLAB to identify trends, anomalies, and performance issues.
• Root Cause Analysis : Investigate operational issues and support the team in identifying technical causes and proposing solutions.
• Data Structuring & Management: Organize and maintain data libraries and documentation systems.
• Tracking & Reporting: Develop dashboards and reports to monitor asset performance and support decision-making.
• Research & Documentation: Support technical research, prepare presentations, and contribute to internal knowledge sharing.
• Project Support: Participate in workshops, team meetings, and process optimization initiatives.

Location

Vattenfall is a European energy company with approximately 21 000 employees. For more than 100 years we have electrified industries, supplied energy to people’s homes and modernized our way of living through innovation and cooperation. We are looking for talented individuals who, in addition to their passion for their own role, also have strong team spirit and want to contribute to supporting a meaningful corporate mission.

Your profile

We’re looking for a curious, analytical, and proactive student who is passionate about renewable energy and data-driven engineering:

• Enrolled in a Bachelor’s or Master’s program in Engineering, Data Science, Renewable Energy, or a related field, with at least 12 months remaining in your study.
• Prior experience in Python and MATLAB for data processing, analysis and visualization is essential. SQL skills are a plus.
• Experience with Azure platform and Databricks is considered a strong advantage.
• Familiar with MS Office, especially Excel, PowerPoint and SharePoint. Experience with Power BI is a plus.
• Structured and independent working style, with a strong interest in battery technology and energy systems.
• Fluent in English (German is a plus).

Our offer

• Real-world experience in large-scale battery projects.
• Opportunity to write your thesis with our expert team.
• Flexible working hours (2–4 days/week during the semester, up to 40 hours during breaks).
• Hands-on involvement in technical, regulatory, and strategic aspects of energy storage.
• A collaborative, inclusive, and self-organized team environment.

More Information

• Start date: Ideally from 1 November 2025
• Flexible 2-4 days/week, max. 20 hours/week with the possibility to increase to 40 hours/week during semester break
• Duration: Minimum 12 months and up to 24 months

We welcome your application in English, including CV and cover letter via the application button at the bottom of this page. We kindly request that you do not send applications by any means other than via our website as we cannot guarantee that we will be able to process applications that are not made via our website.

For more information about the recruitment process you are welcome to contact our recruiter Sabrina Parsons via sabrina.parsons@vattenfall.de.

At Vattenfall we are convinced that diversity contributes to build a more profitable and attractive company and we strive to be good role model regarding diversity. Vattenfall works actively for all employees to have the same opportunities and rights regardless of gender, ethnicity, age, transgender identity or expression, religion or other belief, disability or sexual orientation.

The security of Vattenfall and its employees is essential. For that reason, a pre-employment screening will be part of your recruitment process. The screening is based on the role you will fulfill within Vattenfall. The screening will be performed by a third party, DISA.

We look forward to receiving your application!