UX/UI Engineer for Next-Generation Model-Based Systems Engineering Platform

Are you interested in being part of a company that shapes the future of space and cyber technologies? To have a job where you can contribute to real-world missions with long-term impact?

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.

Tasks and activities

The scope of work will include:

• 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.
• Creating wireframes, mockups, and prototypes in Figma.
• 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.

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• Contributing to high‑fidelity frontend development using ASP.NET Blazor components.
• Participating in SCRUM sprints, demos, and retrospectives.
• Designing and delivering robust, high‑performance user interfaces that provide a visually appealing, intuitive, and unique user experience.
• Leading the front-end development strategy and define the technological roadmap to drive innovation, performance, and scalability.

Skills and experience

The following skills and experience are mandatory:

• 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.
• Familiarity with systems‑engineering contexts and technical users (e.g., engineers, system architects).
• Strong command of wireframing and prototyping tools (e.g., Figma, Adobe XD, Balsamiq).
• Experience working in agile teams, such as, SCRUM.
• Knowledge of C# and experience with Blazor.
• Fluency in English, both written and spoken.

The following skills and experience would be highly desirable:

• 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.

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.