Medior/Senior Software System Engineer | The Hague

Developing software to predict the performance of the latest sonar systems? Plan and evaluate operations with underwater drones? Join TNO as software engineer!

Since the invasion of Ukraine, the geopolitical situation has become more volatile than ever, demanding rapid innovation. TNO plays a key role in this as a knowledge institute for Defense & Security, with more than a thousand specialists working on national and European security.

The Acoustics and Underwater Warfare division brings together acoustic expertise and primarily works for the Royal Netherlands Navy. The Underwater Operations & Seabed Security department focuses on research into autonomous underwater systems, for example, for mine detection using drones, anti-submarine warfare, and the protection of critical infrastructure. We develop advanced acoustic sensors and data processing for environmental awareness and model performance against underwater threats under various conditions.

As a software engineer, you will typically be active in multiple applied research and development (R&D) projects to develop solutions for our customers. You cooperate with other highly motivated programmers and scientists of your team. When needed you take the lead in designing and developing software tools. No two projects are the same, so expect lots of opportunities to develop yourself further.

Your activities will include the following:

• Software development for demonstrators at sea, showcasing new technologies;
• Leading (sub) teams of other software engineers, as well as participating in projects as a team member;
• Discussing with scientists to help realize their ideas into demonstrators;
• Writing software documentation and test reports;
• Stimulating cooperation with colleagues.

If you feel that you can help us progress in these areas and are looking for a job that is meaningful to society, offers lots of variation, and will challenge you as a scientist, you have found your match.

Besides being passionate about the work we carry out, you recognise yourself in the following profile:

• You have a MSc or PhD in a technical field, such as computer science, (applied) physics, astronomy, (electrical) engineering or geophysics;
• You have at least 3 years experience with designing and developing software within projects;
• You have experience with developing software in Python, Matlab and/or C++;
• You are proactive and assertive. You feel responsible for the work within a project and make sure things get done;
• You are a creative problem solver, result-oriented, have a clear and convincing communication style;
• You are able to take the lead, as well as join existing teams as a team member;
• You have a clear affinity with applied R&D. Experience with signal processing and algorithm development is an advantage;
• You like working in teams towards a common goal;
• You are open to broaden your view, curious to learn, and willing to help others to do the same.

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 between € 4.600,- and € 7.000,- (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.
• 34 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[OPTIONAL] or a leased car.
• 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.
• 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 6th of April, 2026. The selection process comprises two interview rounds. The preliminary interview takes place on the 13th of April, 2026. 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.

As you will be working for clients in the domain of defence and security, a Certificate of No Objection issued by AIVD (the Dutch General Intelligence and Security Service) is mandatory. This means you will have to undergo a security screening. Read more about security screening.