Freelancer Opportunity

Job title: Senior UX/UI designer for the Small and Medium Enterprise website

Job location: Brussels, Belgium

Job duration: 2026-03-16 to 2026-12-31

Job weekly hours: 40 hrs./week

Job salary range: 80 to 85 euros an hour

Are you driven by designing experiences that convert visitors into loyal SME customers? At Proximus, we are looking for a Senior UX/UI Designer to play a key role in shaping high-impact, data-driven digital journeys for small and medium businesses on Proximus.be.

Role description:

As a UX/UI Designer for the SME segment, you’ll craft intuitive, conversion-oriented experiences that make it effortless for entrepreneurs and business owners to understand, choose and manage our solutions.

You’ll work at the crossroads of UX, UI and experimentation: transforming insights, analytics and user research into seamless flows, clear interfaces and impactful pages. Collaborating closely with product owners, content designers and developers, you’ll ensure every SME journey feels simple, professional and consistent from first visit to long-term relationship.

Key responsibilities:

As a Senior UX/UI Designer, you will:

Drive the overall UX/UI and experience of the Small and Medium Enterprise website. Create user flows for SME-oriented journeys.

Translate strategic objectives and value propositions into clear concepts, user journeys and flows.

Design wireframes, high-fidelity interfaces and interactive prototypes for mobile, balancing user needs, business goals and technical constraints.

Turn research, analytics, and customer feedback into clear design decisions and measurable improvements.

Actively contribute to and evolve the design system and UX standards, ensuring consistency and quality across the app.

Present and defend design decisions to stakeholders and leadership.

Proactively identify experience gaps and opportunities to meaningfully improve the customer journey. ·

Take full accountability for UX quality within your scope, following up on implementation and outcomes.

User Research & Insights

Lead and conduct user research and usability testing, selecting appropriate methods to validate concepts and design solutions with SME profiles (entrepreneurs, freelancers, small business managers).

Translate research findings into actionable insights, personas, user journeys and service blueprints.

Identify usability issues and pain points specific to SME digital behaviors.

Collaboration & Delivery

Collaborate closely with product owners, analysts, developers, and other designers, while confidently challenging assumptions and proposing alternatives when needed.

Participate in short and mid-term feature delivery cycles in an Agile context.

Present concepts clearly to stakeholders and validate designs through iterative feedback loops.

Continuous Improvement

Use analytics tools (Content Square, Adobe Analytics) to drive data-based decisions.

Stay on top of new trends and best practices in UX, UI and conversion optimization.

Contribute to the UX research library and to the evolution of the SME part of the design system.

Experience & Background:

Bachelor's degree in computer science, Information Systems, Graphic Design, Product development, Psychology or related field, or equivalent work experience.

5+ years of experience as a UX/UI designer, with proven end-to-end ownership of design work.

Strong background in user research, from exploratory research to usability testing.

Experience designing for AI-powered products or assistants.

Skills & expertise:

Excellent command of Figma for UX/UI design and prototyping.

Strong understanding of mobile UX patterns, interaction design, and accessibility.

Knowledge of Content Square, Adobe Analytics or other analytics tools to inform and validate design decisions.

Solid understanding of Double Diamond and human-centered design principles.

Mindset & ways of working:

We are specifically looking for someone who:

Brings an analytical and data-driven mindset.

Is deeply customer-focused, with a hands-on, pragmatic, and can-do mentality.

Is a strong facilitator, able to lead workshops, align diverse stakeholders, and guide teams toward shared decisions.

Has strong stakeholder management and influencing skills, able to navigate differing opinions and push back constructively.

Thrives in complex and evolving contexts, able to stay effective in the face of ambiguity, change and bring clarity.

Works confidently autonomously, taking initiative and ownership while keeping stakeholders aligned. · Communicates clearly and confidently, adapting their message to different audiences.

Demonstrates strong planning and organizational skills, coordinating projects across multiple tribes and departments.

Is curious, future-oriented, and motivated by shaping what comes next, especially in the context of AI and evolving digital experiences.

Languages:

Fluent in Dutch or French, with strong English (spoken and written).

Nice to haves:

Experience with service design and cross-channel journeys.

Experience in telecommunications or similarly complex industries and corporate environments.

Familiarity with Agile product development environments.

Apply now and start your journey with Team Possible! We want to get to know you.

After your application, we will verify your profile and get back to you within 3

working days.

If you’re successful, you can expect the following steps:

An initial conversation with our recruiter - Swati Kumari

Interview with the Hiring Manager and the team.

Final decision

About Proximus

We are Team Possible turning tech into opportunities.

We are driven by four core pillars: "I care," "I make a difference," "I radically simplify," and "I embrace the future". This means you'll join a team that genuinely cares for customers and colleagues, is empowered to make a real impact, strives to radically simplify complex challenges, and is always looking ahead to embrace the future of technology. We believe in an inclusive and safe environment where everyone can thrive, offering extensive career development resources, including access to over 5,000 training modules and a minimum of 5 days of training per year, to help you continuously learn, grow, and tackle bold challenges with us.