Senior UX Designer

Keystone Solutions; Brussel Hoofdstad; Hybrid; EUR 45,000 - 73,000; Full time

Job summary

Keystone Solutions is seeking a Senior UX Designer for an on-site consultancy at a client location. You will design intuitive interfaces, maintain and evolve the design system, and ensure accessibility across applications.

You will conduct needs analysis, plan user research, create mobile-first prototypes, and collaborate with analysts and developers to deliver user-centered solutions. Fluency in French and Dutch is required, with strong English communication for cross-site collaboration.

Qualifications

• Experience designing and maintaining design systems
• Ability to design mobile-first prototypes
• Collaborate with analysts and developers to implement designs
• Bilingual capabilities: French, Dutch, English

Responsibilities

• Design user-friendly interfaces and maintain the design system across products
• Ensure accessibility standards (WCAG 2.1) in all interfaces
• Plan and conduct user research (interviews, surveys, usability tests)
• Collaborate with clients, analysts and developers to deliver solutions
• Communicate progress and findings with stakeholders

Skills

Dutch (Active)

English (Active)

French (Native)

Tools

Figma/Sketch/Mockplus

Job description

Mission Overview:

As a Senior UX Designer, you will be engaged in a consultancy mission at a client site representing Keystone Solutions. Your role involves designing user-friendly interfaces and continuously improving the user experience of applications.

You will pay particular attention to the maintenance and development of the design system. You will ensure that components, patterns, and guidelines remain consistent, accessible, and up-to-date, while supporting teams in their correct usage.

Specifically, you will participate in needs analysis and ensure you understand users and their environment to best determine application requirements.

You will determine and plan research methods and assist in recruiting participants to gather necessary information (interviews, surveys, focus groups, user testing, etc.).

You will propose the most suitable solution and design low and high fidelity interfaces (mobile-first prototyping).

You will assist analysts and developers in designing user interfaces and ensure that the developed application meets user requirements and their environment.

You will ensure that the graphic design of applications complies with accessibility standards.

You have experience in designing, managing, and maintaining design systems and actively contribute to their evolution.

Throughout projects, you will maintain regular and effective communication with clients and the team.

You are bilingual (French and Dutch).

Why Join Keystone Solutions:

• Consultancy Nature: Focus on on-site work and embrace your consultant identity.
• Dynamic Projects: Engage with diverse challenges across various client environments.
• Turbo-Charged Learning: Experience professional development and broad learning opportunities.
• Skyrocketing Ambition: Commit to career growth within our framework.
• Values: As a

Duration:

As soon as possible - 31/12/2026 3 months (full time)

Skills required:

• Figma/Sketch/Mockplus ou autre - Level: Confirmed - Most recent: Any time
• WCAG 2.1 - Level: Confirmed - Most recent: Any time

Language requirements:

• Dutch
• Level Active knowledge
• English
• Level Active knowledge
• French
• Level Native