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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?

We are currently recruiting a Senior Backend Developer to support our cyber-security software activities in the Netherlands.

You will join a team working on challenging and high-impact European cyber-security projects, with technologies and platforms related to cyber ranges, cloud infrastructure, Infrastructure-as-a-Service, secure data management, and distributed software systems.

If you have a passion or interest for cyber security and would like to join a team of seasoned experts with diverse backgrounds, then you are in the right place. At Starion, you will have the opportunity to work and learn in an exciting environment and participate in unique large cyber-security projects for organisations such as the European Space Agency, NATO, and the European Commission.

As a Senior Backend Developer, you will contribute to the design and implementation of backend services and platform components used to support secure data management, system integration, resource sharing, orchestration, and cloud-native deployment. The work will typically involve Java, Spring Boot, databases, APIs, cloud and private-cloud environments, containerised services, and integration with internal and external platforms.

Tasks and activities

The scope of activities will include:

• Designing, implementing, testing, and maintaining backend services using Java and Spring Boot.
• Developing robust APIs and service interfaces for platform integration, data management, and system interoperability.
• Contributing to backend architecture, service decomposition, data modelling, and technical design.
• Implementing secure and maintainable data-management capabilities, including access control, validation, auditability, and traceability where required.
• Integrating backend services with internal platforms, cloud infrastructure, private-cloud environments, and external systems.
• Supporting cloud-native deployment approaches, including containerised services, configuration management, logging, monitoring, and operational readiness.
• Working with relational databases and persistence technologies to manage platform and application data.
• Implementing asynchronous processing, messaging, or queue-based integrations where appropriate.
• Contributing to secure software development practices, including authentication, authorisation, secrets handling, input validation, and secure API design.
• Collaborating with architects, DevOps/platform engineers, and cyber-security specialists to ensure solutions are scalable, secure, and deployable in different environments.
• Participating in code reviews, technical discussions, sprint planning, estimation, and troubleshooting.
• Producing clear technical documentation for APIs, data models, integrations, deployment assumptions, and implementation decisions.
• Taking ownership of backend implementation topics and contribute to the continuous improvement of the software platform.

Skills and experience

The following skills and experience are mandatory:

• Strong Java backend development experience.
• Solid experience with Spring Boot and the Spring ecosystem.
• Background in designing and implementing APIs and backend service interfaces.
• Good understanding of backend architecture, service decomposition, and maintainable code structure.
• Experience with data modelling, data management, and persistence.
• Practical experience with relational databases and non relational databases.
• Background in integrating backend services with external systems and APIs.
• Understanding of asynchronous processing and message-driven design.
• Hands-on experience with automated testing for backend services.
• Exposure with CI/CD and collaborative software development workflows.
• Practical experience with containers, especially Docker or equivalent.
• Understanding of cloud-native backend development concepts.
• Experience with at least one public or private cloud environment.
• Good understanding of secure backend development, including authentication, authorisation, input validation, secrets handling, and audit logging.
• Ability to collaborate with infrastructure, platform, and DevOps engineers while producing clear technical documentation.
• Senior-level ownership of backend implementation, integration, and data-management topics.
• Eligibility for EU security clearance.
• Fluent in English, both written and spoken.

The following Skills and experience are highly desirable:

• Hands-on experience with OpenNebula or other private cloud platforms.
• Proficiency with message queue technologies such as RabbitMQ, Kafka, ActiveMQ, or similar.
• Practical knowledge of infrastructure-as-code tools, including Terraform, Ansible, Pulumi, or equivalent.
• Strong understanding of OAuth2, OIDC, SAML, Keycloak, and identity federation principles.
• Expertise in RBAC/ABAC models, multi-tenant access control, and secure data sharing.
• Familiarity with cyber ranges, simulation platforms, training environments, or testbeds.
• Solid understanding of cybersecurity concepts, including vulnerabilities, attack scenarios, defensive monitoring, incidents, and threat emulation.
• Working knowledge of AI/ML concepts, with hands-on experience integrating AI/ML or analytics components into backend systems.

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.

Apply now