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About this job We are currently looking for a Frontend / Full Stack Software Engineer to join our Defence & Security team in Delft. In this role, you will contribute to the development of advanced software solutions that support defence, security, and critical infrastructure applications. Working within multidisciplinary teams, you will help design and develop intuitive user interfaces and robust backend services that enable operators to make informed decisions in complex environments. You will be involved in projects ranging from situational awareness and command-and-control applications for satellite systems. Your work will directly contribute to technologies that support operational effectiveness and mission success. Job details Frontend / Full Stack Software Engineer – Defence & Security Main responsibilities This is an excellent opportunity for someone who enjoys combining modern software development with real-world impact in a highly technical environment. • Develop Modern Applications • Design and develop user-friendly applications for defence. • Build intuitive interfaces that present complex technical and operational satellite information in a clear and actionable way. • Develop and maintain backend services and APIs supporting frontend applications. • Collaborate Across Disciplines • Work closely with software engineers, system architects, domain experts, and end-users. • Translate operational requirements into scalable and maintainable software solutions. • Participate in technical discussions and contribute to system design decisions. • Deliver High-Quality Software • Develop secure, reliable, and maintainable code. • Contribute to software testing, validation, and continuous improvement activities. • Support deployment, integration, and lifecycle management of software systems. • Contribute to Innovation • Explore and implement new technologies, frameworks, and development approaches. • Support the development of next-generation Defence & Security capabilities. • Contribute to proof-of-concepts, demonstrations, and customer-facing projects. Requirements Education & Experience • Bachelor's or Master's degree in Computer Science, Software Engineering, Information Technology, or a related field. • Experience in frontend or full stack software development. • Experience developing modern web applications. Technical Skills Experience with some of the following: • TypeScript / JavaScript • React, Angular, Vue.js, or similar frontend frameworks • HTML5 and CSS • REST APIs • Node.js, Python, Java, or C# • Docker and containerised environments • Git and modern software development practices • Agile/Scrum methodologies Nice to Have • Experience with GIS or geospatial applications. • Experience with real-time data processing and visualisation. • Experience within Defence, Aerospace, Security, or Critical Infrastructure sectors. • Knowledge of Command & Control systems. • Experience working in secure or classified environments. Personal Skills • Strong analytical and problem-solving skills. • Ability to communicate technical concepts clearly. • Team-oriented and proactive mindset. • Interest in Defence, Security, and high-tech innovation. • Ability to obtain the required EU security clearances. Language • Good command of English. • Dutch is considered a strong advantage. What We Offer • Competitive salary between €3,500 – €4,500 gross/month (based on experience, full-time) • The opportunity to work on innovative technologies with real operational impact. • Challenging projects within the Defence & Security domain. • Collaboration with highly skilled engineers and domain experts. • A modern and flexible working environment. • The opportunity to contribute to solutions that help protect people, infrastructure, and society. • An yearly fun trip abroad with the entire company! Please note that if you do not hear back from us within 10 days of your application, you may assume that we have selected another candidate we would like to interview for this position. We do our best to get back to you individually, however, due to a high volume of responses, it can be that we have not been able to reject your application in person. We kindly request that recruitment agencies do not contact us regarding this vacancy. We are not seeking assistance and will not be liable for any fees or charges associated with unsolicited CVs or candidate introductions. Any candidates submitted by agencies without prior written agreement will be considered our direct applicants and may be employed without obligation or fee. Are you enthusiastic about becoming our new Frontend / Full Stack Software Engineer – Defence & Security Apply via our application form, or send your CV and motivational letter directly to [email protected]. Our story At S[&]T we contribute to a safer life on earth by translating space data into valuable and actionable insights. We oversee data from instruments to application, and apply our expertise within our software frameworks, information products and consultancy. Our society relies on space and scientific instruments for climate change monitoring, navigation, defence and national security, and other crucial services we all use in our daily lives. These instruments produce an enormous quantity of complex data, and our goal is to unlock its value. We have more than 20 years of experience working on instrument calibration, the creation of data quality monitoring tools, the development of real-time data processing frameworks, and the development of application-specific algorithms. With this, we help organisations, governments and industries to strengthen their information position and thereby improve their decision making. We focus on the following domains: Space & Science, Defence & Security, Environment & Sustainability, and High-Tech Consulting. Privacy notice In order to apply for this vacancy you must submit your personal information to S[&]T. We will collect, use, and process your personal information as mentioned in our Privacy Policy. Our policy and processing of your personal information are compliant with the GDPR. How to apply Would you like to hear more? Send your CV and motivational letter to or through our website. Kindly note that acquisition from third parties (e.g. agencies) based on this vacancy is not welcome.