Senior UI/UX Designer - EU Agency

Altia; Brussel; Hybrid; EUR 60,000 - 90,000; Full time

Job summary

Altia is seeking a Senior UI/UX Designer to join our IT Consulting Group. You will translate complex business requirements into intuitive UI solutions, create and maintain design systems, and drive an end-to-end design-to-development lifecycle across large-scale enterprise software projects.

The role emphasizes strong prototyping, UX research, accessibility, and collaboration within an international, multicultural project environment. Primarily remote with occasional on-site presence in Brussels.

Qualifications

• University degree required.
• 17+ years IT experience with measurable outcomes.

Responsibilities

• Translate complex business requirements into intuitive UI solutions.
• Create and maintain design systems, tokens, and component libraries.
• Lead end-to-end design-to-development lifecycle and usability testing.

Skills

Design systems

Prototyping

UI/UX design

UX Research

Usability testing

Web accessibility

Data visualisation

Wireframing

Illustration

Education

University degree

Tools

Figma

Balsamiq

InVision

UXPin

Framer.js

Job description

Hello everyone! We are currently looking for a Senior UI/UX Designer to join our team.

About us

We are an IT Consulting Group providing innovative digital solutions across Europe.

Learn more: www.altiacompany.com/en

The project

Join an international project supporting large-scale enterprise solutions in areas such as grant management, UX/UI improvements, and digital transformation. You will play a key role in translating complex business requirements into intuitive UI solutions, creating design systems, and facilitating the end-to-end design-to-development lifecycle.

Requirements

• Education: University degree.
• Total IT Experience: At least 17 years of professional experience in IT with concrete examples of projects and measurable outcomes.
• Languages: Minimum B2 level in English or French (spoken and written).

Core Design & Prototyping Skills

• Advanced expertise in design, wireframing, and interactive prototyping tools (e.g., Figma, Balsamiq, InVision, UXPin, Framer.js).
• Creation and maintenance of comprehensive Design Systems (style guides, tokens, component libraries, templates, guidelines).
• Graphic design, illustrations, infographics, and data visualisations.

UX Research & User Testing

• End-to-end UX research (personas, user journeys, task analysis, heuristic evaluations, analytics).
• Experience conducting usability testing, A/B testing, hallway testing, and post-release validation (eye tracking knowledge is a plus).

Web Standards

• Strong foundation in interface ergonomics, responsive design, web accessibility, data protection, and security principles.

What we offer

• Work Mode: Mainly remote / far-site work setup (with occasional on-site presence in Brussels)
• International, multicultural, and high-impact project environment.
• Opportunity to shape large-scale European enterprise software products and design standards.
• Long-term collaboration and career growth opportunities.

This job offer has been drafted with impartiality and non-discrimination on the basis of gender, race, ideology or any other grounds in mind. In particular, it complies with current regulations on gender equality between women and men (Royal Decree-Law 6/2019).