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Development physicist

Fight cancer with code! 

Software is an essential weapon in the fight against cancer. It’s driving innovation in radiation therapy, which is one of the most important forms of cancer treatment. As a physicist and developer, your skills can make a vital difference.

RaySearch Laboratories is a fast-growing international company with a mission to advance cancer treatment through innovative software. We are looking for talented physicists to help pioneer the next frontier of medicine. Joining us will give you exciting challenges and the chance to contribute to something truly worthwhile. 

About the position

This is a full-time role as a physicist and software developer, based at our head office in central Stockholm. 

You will work in an agile team with other physicists, application developers and test specialists, all dedicated to designing and evolving cutting-edge medical software. 

The physics group within RaySearch’s development department is responsible for physics algorithms and functionality for photon, electron, proton and carbon-ion treatments. You will participate in all steps of the development process, including analysis, software design, implementation and testing. The physics algorithms are implemented in C++ and the application layers in C#/.NET. In addition to the scrum team, members of the physics group also interact directly with customers and partners and are sometimes involved in more complex sales processes. 

Education & Experience

  • MSc in engineering physics or similar, with results and selected courses demonstrating a deep physics knowledge. Understanding of ionizing radiation is an advantage.
  • 3-8 years of experience in an academic or industry environment, with a focus on solving physics modeling problems or software development. Junior applicants are welcome to apply for the junior development physicist position.
  • Programming skills and interests are minimal prerequisites. Strong programming skills, especially in C++ and/or C#, and experience from development are advantages.
  • Fluency in English is required. Fluency in Swedish is a strong advantage.

Personal Profile

You have good analytical skills and a creative mindset. When working on a problem, you formulate the right questions, identify what is important and work in a goal-oriented way towards a solution. You are a strong team player who takes responsibility and contributes to a positive atmosphere. You take pride in delivering high-quality results with efficiency. 

Working at RaySearch

RaySearch believes in investing in its people. We offer outstanding staff benefits and excellent career development opportunities in a flexible and stimulating environment. We prioritize knowledge-sharing, creativity and collaboration, and you will work together with some of the most talented and highly educated people in the industry. You will work in a modern office environment with access to the latest hardware and tools.

We encourage a healthy work-life balance and have created a strong social culture, with regular events and activities for employees.

RaySearch is committed to equal opportunities. We value diversity and are dedicated to preventing discrimination. Read more about RaySearch.


Click the button below to send in your application (in Swedish or English), which should include a resumé, personal letter and documentation of your university education, including transcripts of record from your MSc and BSc. Mark the application “Development Physicist.”

The recruitment process will be ongoing as long as this posting is present. To enquire about the status of your application, please contact Erik Engwall, Head of Physics (preferably by email after the 15th of January).