Vacatures java Rotterdam

Software Architect

Location: Leiden, Netherlands

Application deadline: 25 February 2026

Reference number: 0428

Are you looking for a new opportunity to take your career to a higher orbit? To join an international group with a successful track record in Space Engineering? A job adapted to your career ambitions and in which you could have an impact for the years to come?

Starion is currently recruiting a Software Architect / Technical Lead to join its cyber‑security team. The role offers the opportunity to work in a challenging European‑level environment, using state‑of‑the‑art technologies in cyber security and Infrastructure‑as‑a‑Service.

You will join a team of experienced experts with diverse backgrounds and contribute to large‑scale cyber‑security projects for the European Space Agency, NATO, and the European Commission.

This is a permanent position, based in Leiden, the Netherlands, offering strong opportunities for professional growth and hands‑on involvement in high‑impact projects.

Tasks and activities

The scope of work will include:

• Contributing to the R&D of cyber‑security products enabling simulation and testing of complex systems across space, defence, and critical infrastructure.
• Collaborating with stakeholders to define functional and non‑functional requirements for new software and applications.
• Using modern tools and methodologies to design high‑level and detailed software solutions.
• Defining all aspects of development, from technology selection and workflows to coding and quality standards.
• Clearly communicating concepts and guidelines to the development team.
• Overseeing development progress to ensure alignment with the initial design.
• Delivering technical guidance and mentoring within an Agile development team.
• Implementing code in compliance with defined quality standards.
• Ensuring delivered software complies with all defined quality standards.
• Solving and clearly communicating complex problems across application design, development, and user experience.

Skills and experience

The following skills and experience are mandatory:

• Bachelor’s or Master’s degree in Computer Science, Mathematics, or a related field.
• More than five years of professional software development experience, including technical leadership or architectural responsibilities.
• Experience with large‑scale, complex software systems.
• Extensive full‑stack development experience
• Strong experience with modern Java (Java SE 20+ and recent LTS versions) and JavaScript/TypeScript, including modern front‑end frameworks.
• Significant understanding of common software architecture patterns, including layered, hexagonal, event‑driven, and microservices.
• Experience with Agile methodologies, Git‑based source control, and UML/SysML architectural modelling
• CI/CD and automated testing experience.
• Strong knowledge of software quality assurance, static analysis, and code quality tools, such as, SonarQube, with strong analytical and problem‑solving skills.
• Proven technical team leadership and mentorship.
• Fluent in English, both written and spoken.

The following skills and experience would be highly desirable, in order of priority;

• Experience with software architecture documentation for complex systems.
• Knowledge of both private and public cloud platforms (OpenStack, Azure, AWS, etc.).
• MBSE principles experience.
• Exposure to Spring Boot and cloud‑native platforms (AWS, Azure, GCP).
• Proven experience with containerization and orchestration technologies such as Docker and Kubernetes, including building, deploying, and operating containerized workloads in development and production environments.
• Recognised project management certification (PMP, PRINCE2, or equivalent).

Why should you apply?

• You will have the opportunity to work within leading space organisations across Europe.
• We encourage everyone to think outside the box and to push the boundaries of traditional knowledge. This role is an opportunity to join a forward‑thinking company and allows for a deeper understanding of the industry.
• To be part of a company that values integrity, inspiration, care and collaboration.
• Benefits include: competitive remuneration packages; unique career opportunities, including working in other countries; access to training and development programmes; flexible relocation support.

We are proud to be an equal opportunity employer, committed to achieving diversity within the workforce and creating an inclusive working environment. We therefore welcome applications from all candidates, irrespective of gender, sexual orientation, ethnicity, religious beliefs, age, disability or other characteristics.

As part of our commitment to providing an inclusive and barrier‑free recruitment process, we will provide reasonable adjustments and support to ensure neuro‑diverse applicants or those with a disability or long‑term condition can be their best during the recruitment process.

About Starion

Starion is one of two new legal entities rebranded from the RHEA Group, focused on space consultancy and space engineering services and solutions. Starion provides engineering expertise and solutions for space, defence and other critical infrastructures across Europe, pushing the boundaries of innovation. Our teams work on world‑leading space projects that deliver the pioneering missions that provide us with the information and technologies we use today.

Starion offers over three decades of expertise in professional engineering services, developing and operating systems and solutions tailored to our clients’ needs. By combining space and system engineering with established and emerging technologies, such as AI and quantum, we produce innovative solutions that make a fundamental difference for our clients and for society.

Starion employees are located across Europe, close to our clients’ offices, enabling us to be responsive and agile. Our engineers and researchers are among the most trusted and respected in the industry, helping build space‑based solutions that address major challenges on Earth such as civil security, climate change and deforestation.

How to apply

Looking to take your career to the next level or find out more details about this opportunity? Interested applicants should submit their CV and Cover Letter to Starion’s Recruitment team at careers@stariongroup.eu no later than 25 February 2026

Preference will be given to candidates eligible for an EU or national personal security clearance at the level of CONFIDENTIAL or above.

Apply now

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