PhD Position – Representation and Active Learning for Multi-Scale Scientific Imaging

The PhD project is methodologically independent and embedded in a multidisciplinary research environment at the interface of artificial intelligence, scientific imaging, and materials research. You will strengthen the data science and machine learning activities of IAS-9 by developing core AI methods with applications to electron microscopy and materials discovery. You will work in a team of data scientists, software engineers, and experimental researchers on topics including:

• Developing multi-scale and multi-modal representation learning methods for scientific imaging data (e.g., SEM, TEM, EBSD).
• Learning representations that are robust to scale changes, modality shifts, and domain differences across instruments and laboratories.
• Designing active learning and experimental design strategies that use learned representations to guide data acquisition under cost and uncertainty constraints.
• Building surrogate models that connect imaging-derived representations with downstream physical or functional properties.
• Collaborating closely with experimental partners to integrate decision-making algorithms into real scientific workflows.
• Publishing results in high-impact machine learning and interdisciplinary journals and conferences, and contributing to open-source research software.

The developed methods will be validated using large-scale electron microscopy data from collaborative research projects, including an EU-funded project on sustainable steel development, while maintaining a clear focus on fundamental AI research questions.

We are looking for a highly motivated candidate with a strong interest in foundational machine learning research and its application to real-world scientific problems. You should bring:

• A completed university degree (Master's or equivalent) in computer science, data science, applied mathematics, physics, materials science, or a related field.
• Solid background in machine learning and/or computer vision.
• Interest in representation learning, active learning, uncertainty modeling, or decision-making under constraints.
• Experience with Python and modern ML frameworks such as PyTorch or TensorFlow.
• Curiosity for interdisciplinary research; prior experience with scientific or microscopy data is welcome but not required.
• Strong analytical skills, scientific creativity, and the ability to work independently while collaborating in a team environment.

We work on the very latest issues that impact our society and are offering you the chance to actively help in shaping the change! We support you in your work with:

RESEARCH & INFRASTRUCTURE: The opportunity to conduct exciting research in an international and multidisciplinary environment with outstanding infrastructure and to strengthen your reputation in a dynamic and highly active research field
ENVIRONMENT: A creative work environment at a leading research facility, located on an attractive research campus at the TZA Aachen https://tza-aachen.de and the Forschungszentrum Jülich
NETWORKING & EXCHANGE: The opportunity to attend national and international conferences and actively build your scientific network
KNOWLEDGE & DEVELOPMENT: Your professional development is important to us - we support you specifically and individually, e.g., through training and networking opportunities specifically for doctoral candidates (JuDocS): https://go.fzj.de/JuDocs
SUPPORT FOR INTERNATIONAL EMPLOYEES: Our International Advisory Service makes it easier for international employees to get started
FAIR REMUNERATION: Depending on your qualifications and assigned responsibilities, you will be classified according to pay group 13 (80%) of the TVöD Bund. Additionally, you will receive a special payment (“Christmas bonus”) amounting to 60% of one month’s salary. All information about the TVöD Bund collective agreement can be found on the BMI website (pay scale table on page 69 and following of the PDF download): https://go.fzj.de/bmi.tvoed
FIXED-TERM: The position is limited to 3 years

In addition to exciting tasks and a collegial working environment, we offer you much more: https://go.fzj.de/benefits

To apply, please submit a complete CV, letter of motivation, university degree records and certificates.

Place of employment: Jülich/Aachen

We welcome applications from people with diverse backgrounds, e.g. in terms of age, gender, disability, sexual orientation/identity, and social, ethnic and religious origin. A diverse and inclusive working environment with equal opportunities in which everyone can realize their potential is important to us.

The following links provide further information on diversity and equal opportunities: https://go.fzj.de/equality and on the targeted promotion of women: https://go.fzj.de/womens-job-journey