Senior UX Designer

Keystone Solutions; Brussel; On-site; EUR 60,000 - 90,000; Full time

Benefits offered by this job

On-site consultancy

Professional development opportunities

Diverse client projects

Job summary

Keystone Solutions is seeking a Senior UX Designer for on-site consultancy in Brussels. You will design user-friendly interfaces, improve applications UX, and maintain the design system to ensure consistency and accessibility.

You will collaborate with analysts and developers, conduct needs analyses, plan and run user research, and create mobile-first prototypes that meet user requirements and client environments.

Qualifications

• Proven experience designing and maintaining design systems.
• Fluent in French and Dutch; on-site consultancy.
• Mobile-first UI design with accessibility focus (WCAG 2.1).

Responsibilities

• Design user-friendly interfaces and continuously improve the UX of applications.
• Maintain and develop the design system for consistency and accessibility.
• Ensure components, patterns, and guidelines stay up-to-date and correctly used by teams.
• Participate in needs analysis to understand users and environments for requirements.
• Plan and conduct user research (interviews, surveys, focus groups, testing).
• Design low- and high-fidelity interfaces (mobile-first prototyping).
• Collaborate with analysts and developers to implement user-centered designs.

Skills

Figma/Sketch/Mockplus

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