Optical Scientist Biophotonics | Delft

TNO Optics designs and fabricates high-end optical systems for a broad range of applications, such as space-based atmospheric monitoring, optical satellite communication, medical instrumentation, quantum technologies, structural health monitoring and instrumentation for the semiconductor industry. This work is for customers including Airbus, NASA and Heidelberg Engineering. Our optics technology expertise ranges from large-scale geometrical optics to fibre optics, integrated photonics and sub-wavelength metamaterials. With a background in physics, and a strong interest in optics and medical applications, you will be working as an Optical Scientist specialized in developing and analyzing Monte Carlo based light propagation simulations. TNO develops optical simulations for use in the next generation of medical devices with current applications in the skin, retina, and brain. Our projects are typically multi-disciplinary, combining expertise with substantial knowledge of the respective application domains. You will work closely with your direct colleagues of the Optics group, with other TNO experts from other domains, and with external stakeholders from research organisations and companies from across the world.

As an Optical Scientist, you will work collaboratively with our team of physicists and biomedical engineers on our in-house Python package for Monte Carlo photon propagation simulations (TOMCA). You will play a crucial role in developing and refining simulation models for light transport through human tissues, with a focus on skin applications and analysis for a variety of devices and projects. You will also play a significant role in the experimental validation of the simulation outputs based on artificial tissues as well as clinical data.

You will be responsible for:

• Developing and refining software for optics simulation models.
• Collaborating with the team to interpret simulation results and provide insights.
• Design and perform experiments to validate the simulation outputs.
• Assisting in troubleshooting and optimizing code, including Python, MATLAB, and CUDA.
• Conducting literature research and interpreting medical research to inform simulations.
• Maintaining up-to-date documentation and contributing, as a member of project teams, to the organization of projects.

A considerable level of autonomy and initiative is expected from you. To be able to perform your role well, it is important that you recognize yourself in the following profile:

• PhD in physics, biomedical optics (or equivalent experience).
• Experience with light propagation modeling using Monte Carlo simulations.
• Strong coding skills, particularly in Python; experience with MATLAB and CUDA is a plus.
• Interest in working in the medical domain and contributing to healthcare innovations.
• Excellent organizational and communication skills with a strong internal motivation for finding the “story” in data.
• Methodical data analysis mindset, useful for multi-dimensional parameter space analysis.
• Able to communicate fluently in English (you will have many international colleagues and collaborators).

Challenging and varied work with a real impact. And plenty of opportunities as, at TNO, you are in charge of shaping your career. We offer a gross monthly salary (based on your knowledge and experience), 8% holiday pay, a 13th month bonus of 8.33% and a flex budget (5.58% + € 180). In addition, you will be given every opportunity to develop yourself.

TNO offers optional employee benefits, enabling you to tailor your benefits package to match your personal situation. You may also expect:

• An extremely professional, innovative working environment where colleagues are leading experts in their field.
• The opportunity to attend courses, workshops and conferences, and to receive training and coaching based on your needs.
• 33 days annual leave on a full-time basis.
• An employer that values and encourages diverse talent, with initiatives like the Female Leadership Program, our Rainbow Community and round tables on inclusion topics.
• We offer a comprehensive and flexible mobility plan that also includes full compensation for public transportation for commuting and business travel.
• Great social events with your team and other TNO colleagues. That’s how you will get to know a lot of people really quickly.
• Flexible working hours, the possibility to work parttime (32 of 36 hours) and the possibility of working from home.
• Access to our Talent Development Programme.
• Networking opportunities and great activities organized by Jong TNO.
• Extensive relocation package for international candidates.
• A good pension scheme.

Read more about tailoring your benefits package.

At TNO, we innovate for a healthier, safer and more sustainable life. And for a strong economy. Since 1932, we have been making knowledge and technology available for the common good. We find each other in wonder and ingenuity. We are driven to push boundaries. There is all the space and support for your talent and ambition. You work with people who will challenge you: who inspire you and want to learn from you. Our state-of-the-art facilities are there to realize your vision. What you do at TNO matters: impact makes the difference. Because with every innovation you contribute to tomorrow’s world. Read more about TNO as an employer.

At TNO we encourage an inclusive work environment, where you can be yourself. Whatever your story and whatever unique qualities you bring to the table. It is by combining our unique strengths and perspectives that we are able to develop innovations that make a real difference in society. Want to know more? Read what steps we are taking in the area of diversity, equity and inclusion.

Please apply before the 23th of November, 2025. The selection process comprises two interview rounds. In a final meeting we will discuss the terms of employment and your tailored benefits package. We aim to finalize the entire process within four weeks.

The selection process may include an online assessment and a reference check.

A certificate of Conduct (VOG) is required before starting a new job at TNO.