Scientific Software Engineer

Scientific Software Engineer for Research Software Engineering Group

The European Spallation Source (ESS) is one of Europe’s largest research infrastructure projects and is building the world’s most powerful neutron source. Through cutting-edge science and technology, ESS will enable discoveries that advance our understanding of materials, energy, health, and the environment.

About the role

The Research Software Engineering (RSE) group develops and maintains critical software systems that make neutron scattering experiments at ESS possible and successful.

As a Scientific Software Engineer, you will contribute to the development of key platforms supporting the scientific user journey, including the ESS User Portal, metadata catalogue, electronic notebook, and related scientific information systems. You will work closely with scientists, software engineers, and stakeholders across ESS to gather requirements, understand user needs, and develop robust software solutions that integrate seamlessly with the wider ESS ecosystem.

The RSE group uses modern web technologies and software engineering practices to deliver high-quality software with a long operational lifetime. In addition, the group is expanding its focus on Artificial Intelligence and Machine Learning solutions that can enhance the scientific user experience. As part of this effort, you will contribute to new AI-related initiatives and help establish RSE as a centre of expertise and development for AI applications within the Science Directorate.

This position is well suited for an experienced software engineer with a strong technical foundation, excellent collaboration skills, and a passion for building software that enables world-class scientific research.

Key responsibilities

• Design, develop, test, and maintain software systems supporting the scientific user journey at ESS.
• Contribute to the development of the ESS User Portal, metadata catalogue, electronic notebook, and related scientific information management systems.
• Gather, analyse, and refine requirements from scientific and technical stakeholders across ESS.
• Design and implement integrations between RSE applications and other ESS services and platforms.
• Apply modern software engineering practices to deliver reliable, maintainable, and high-quality software solutions.
• Contribute to technical and process improvements within the SIMS group.
• Participate in AI and Machine Learning initiatives supporting the Science Directorate.
• Collaborate with scientists, software engineers, and international partners to develop innovative solutions for scientific computing and data management.
• Provide technical guidance and knowledge sharing within the team when appropriate.
• Contribute to software architecture discussions and technology decisions within the group.

Required qualifications

• Master's degree in Computer Science, Software Engineering, Physics, Engineering, or a related field, or equivalent experience.
• Typically 4-7 years of relevant professional experience in software development.
• Experience developing modern web applications and services.
• Strong programming skills and experience with modern software development practices.
• Experience gathering requirements and working directly with stakeholders and end users.
• Experience designing and implementing integrations between complex software systems.
• Ability to work independently and manage technical tasks and projects with limited supervision.
• Excellent communication skills in English, both written and spoken.

Desirable qualifications

• Experience working with scientific software, research infrastructures, or data-intensive environments.
• Experience with cloud-based services and distributed systems.
• Experience with Artificial Intelligence and Machine Learning technologies and their practical application.
• Experience with user-facing platforms, portals, or information management systems.
• Familiarity with modern DevOps practices, CI/CD, automated testing, and container technologies.
• Experience working in international and multidisciplinary environments.
• Experience contributing to open-source software projects.

What we offer

DMSC is located on the DTU campus in Kongens Lyngby, north of Copenhagen, while the ESS neutron facility is based in Lund, Sweden. Together, they form a unique cross-border scientific environment in the Øresund region.

You will join a dynamic and highly collaborative international workplace with colleagues representing nearly 60 nationalities across ESS and DMSC. We offer flexible working conditions, opportunities for professional development, and close interaction between computational science, instrumentation, and large-scale experiments.

Benefits include 25 + 5 annual leave days in addition to public and company holidays, an attractive pension scheme, preventative healthcare benefits, and relocation support for international hires where applicable.

This is a full-time, permanent position based in Kongens Lyngby, Denmark, and we need someone who can start as soon as practically possible.

Learn more about living and working in Scandinavia: https://ess.eu/living-working-scandinavia

For further information

For information about the position, contact the Group Leader for SIMS, Fredrik Bolmsten at Fredrik.bolmsten@ess.eu.

For recruitment-related questions, contact Recruitment Officer Janne Erwolter at janne.erwolter@ess.eu.

Application deadline

Please submit your application no later than November 5, 2026.