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We are currently looking for a Software Engineer to join the team in the Leiden Area . We are looking for an experienced Software Engineer to join a team developing advanced software applications that support operational decision-making in mission-critical maritime environments. You will contribute to the development of innovative applications used to monitor incidents, guide operators through complex procedures, and support damage control and emergency response. Working in an Agile environment, you'll help build new functionality, develop entirely new applications, and contribute to the evolution of a modern, event-driven software architecture based on C#, .NET, and contemporary frontend technologies. Job details Software Engineer C#/.NET Main responsibilities • Design, develop, and maintain software applications that support operational processes and decision-making in complex technical environments. • Develop new functionality for existing desktop, web, and mobile applications. • Integrate new software solutions into an existing ecosystem of applications and services. • Contribute to the migration toward a modern software architecture using C#, .NET, HTML5, TypeScript, and React. • Develop new applications for next-generation mission-critical systems. • Design and implement event-driven and distributed software architectures. • Continuously identify opportunities to improve software quality, development workflows, and deployment processes. • Collaborate with customers and technical stakeholders to gather requirements and provide technical input. • Demonstrate new functionality during technical reviews and stakeholder presentations. • Create and maintain technical documentation, including Software Requirement Specifications (SRS). • Develop, execute, and maintain automated tests to ensure software reliability and quality. Requirements • Bachelor's degree (HBO) or higher in Computer Science, Software Engineering, or another relevant technical discipline. • At least 4 years of professional experience developing applications with C# and .NET (e.g. .NET 8 and ASP.NET Core) in an Agile environment. • Experience with event-driven architectures, RPC, and distributed systems. • Experience with Git, Microsoft Visual Studio, Docker, PowerShell scripting, and Azure DevOps (including CI/CD pipelines). • Experience with Windows and Linux development environments. • Strong analytical and problem-solving skills, with a structured approach to developing robust software solutions. • Excellent communication skills and the ability to collaborate effectively with multidisciplinary teams and stakeholders. • Excellent command of both Dutch and English. • Willingness to undergo a background screening and security clearance process. Nice-to-haves • Experience with Kubernetes. • Knowledge of DDS, WPF, or MEF. • Experience with relational databases such as PostgreSQL and SQL Server. • Experience developing software for high-reliability or mission-critical systems. 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 Software Engineer? 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.