Are you interested in being part of a company that shapes the future of space and cyber technologies? We’re looking for a skilled UX/UI Engineer with strong experience in both design and implementation to join our team at our Diegem office, near Brussels, Belgium (hybrid homeworking model). You will join a multidisciplinary team developing a next‑generation, web‑based 'Model‑Based Systems Engineering' platform built on the new SysML v2 standard and leveraging the CDP4‑COMET foundation. This platform supports collaborative and concurrent design workflows for complex systems across sectors such as aerospace, defence, and automotive. In this role, you will lead the design and implementation of intuitive, high‑performing user interfaces tailored for system engineers, domain specialists, and project reviewers. Designing intuitive, role‑based interfaces for complex MBSE workflows Working closely with C# backend developers, systems engineers, and product owners to turn domain needs into efficient user journeys. Designing and maintaining a consistent design system (icons, typography, layout, colours). Supporting user testing with the QA engineer, including usability sessions and feedback collection from expert and novice users. Minimising cognitive load in complex data environments. NET Blazor components. Designing and delivering robust, high‑performance user interfaces that provide a visually appealing, intuitive, and unique user experience. Bachelor’s or Master’s degree in UX, HCI, Interaction Design, or a related field. ~3+ years of experience in UI/UX design, preferably within engineering or technical environments. ~ Proven experience designing complex, data‑driven web applications. ~ Experience working in agile teams, such as, SCRUM. ~ Knowledge of C# and experience with Blazor. ~ Fluency in English, both written and spoken. Knowledge of MBSE, SysML, UML or similar modelling languages, along with a solid understanding of accessibility and responsive design principles. Prior exposure to open‑source projects or distributed teams. access to training and development programmes; We therefore welcome applications from all candidates, irrespective of gender, sexual orientation, ethnicity, religious beliefs, age, disability or other characteristics.