The German Cancer Research Center (DKFZ) is one of the largest cancer research centers in Europe. "Research for a life without cancer" is our mission, and our world-class scientists work together with all employees to achieve this.

We investigate how cancer develops, identify cancer risk factors, and search for new strategies to prevent people from developing cancer. We develop new methods for more precise tumor diagnosis and more successful treatment of cancer patients. Every contribution counts – whether in research, administration, or infrastructure. This is what makes our daily work so meaningful and exciting.

Do you want to take on responsibility, introduce modern technologies and make existing systems fit for the future? Then you've come to the right place.

We are looking for someone to join our Core Facility Information Technology (ITCF) as soon as possible.

Reference number: 2026-0087

• Heidelberg
• Full-time
• IT Core Facility

This role focuses on developing applications based on LLMs. The emphasis is on operating the chatbot web interface, implementing Retrieval-Augmented Generation (RAG), and integrating with internal databases.

• Design, operation and further development of a user-friendly web interface for the AI ​​chatbot from a UX perspective.
• Implementation of mechanisms for data security and compliance (e.g. data protection, access controls)
• Implementation of RAG solutions to improve the overall performance of the chatbot through the integration of internal data.
• Design and implementation of data pipelines to unlock internal data sources for the models.
• Collaborating with other teams to integrate AI solutions into existing business applications
• Ensuring the smooth operation of the chatbot and the RAG functions
• Creation of documentation for internal users and developers
• Developing reference architectures and providing advice on internal projects

We are looking for a technically skilled and team-oriented individual with a high degree of initiative and strong problem-solving skills, who also meets the following requirements:

• Successfully completed studies (e.g. Bachelor's degree) in computer science or a comparable qualification, such as IT specialist for system integration, ideally with relevant professional experience.
• Experience in development with modern Python-based frameworks (e.g., LangChain, FastAPI)
• Knowledge of data structures and experience in developing modern web applications
• Knowledge of databases, data warehouse systems and ETL processes
• Understanding of Retrieval Augmented Generation and its integration into LLMs, as well as Prompt Engineering and Quality Metrics (RAGAS)
• Ability to design and implement complex data pipelines
• Ideally, experience with low-code platforms.
• Knowledge of cloud and container technologies as well as Git and CI/CD pipelines (e.g. Kubernetes, Docker, GitLab)
• Sensitivity to regulatory requirements (e.g., AI Act) and data protection issues
• High willingness to learn and interest in new technologies
• Fluent written and spoken communication skills at B2 level in German and English

• Excellent framework conditions: state-of-the-art infrastructure and opportunities for top-level international exchange
• 30 days of vacation
• Flexible working hours
• Remuneration according to TV-L including company pension scheme and capital-forming benefits
• Opportunities for mobile work and part-time work
• Family-friendly work environment
• Sustainable commuting to work: Discounted Germany job ticket
• Unleash your full potential: targeted offers for your personal development foster your talents.
• Our company health management offers a holistic program for your well-being.

Your contact person:
Markus Hohenhaus
Telephone: +49 6221 42-2446

The position is permanent.

Application deadline: May 12, 2026

Unfortunately, we cannot accept applications submitted via email.
Please also note that we are unable to return applications submitted by post.

Then become part of the DKFZ and join us in contributing to a life without cancer!

Apply now

We are convinced that an innovative research and work environment thrives on the diversity of its employees. Therefore, we welcome applications from talented individuals, regardless of gender, cultural background, nationality, ethnicity, sexual identity, physical abilities, religion, or age. Applicants with disabilities will be given preference if equally qualified.

Note: We are subject to the regulations of the Infection Protection Act (IfSG). Therefore, all our employees must provide proof of immunity against measles.

German Cancer Research Center | Im Neuenheimer Feld 280 | 69120 Heidelberg | www.dkfz.de