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We help organizations design digital products that are intuitive, accessible, and built for real users.
At UXellence, we transform complex digital challenges into seamless user experiences.
With 18+ years of experience across telecom, publishing, public sector, and media, we bring senior-level UX expertise to every stage of the product lifecycle—from research and strategy through design and delivery.
Whether you need to rethink your product's architecture, validate a design with real users, scale your design system, or ensure your platform is accessible to everyone, UXellence is your partner.
Our Services:
UX Strategy & Design Leadership: We work with product teams and stakeholders to define UX visions that align user needs with business objectives—then we execute on them.
User Research & Usability Testing: We uncover what your users actually need through interviews, surveys, usability testing, and behavioral analysis—turning insights into design decisions that drive results.
UX/UI Design: We craft intuitive, engaging interfaces grounded in research and best practices—from wireframes and prototypes to polished, production-ready designs.
Information Architecture: We structure content and navigation so that complex products feel simple—reducing cognitive load and helping users find what they need, fast.
Design Systems: We build and maintain scalable design systems that ensure visual and interaction consistency across products and teams while accelerating delivery.
Accessibility consulting: We audit digital products for WCAG compliance, identify barriers, and build actionable roadmaps for inclusive design—including European Accessibility Act readiness.
UX Audits: We conduct comprehensive evaluations of your existing digital products, delivering prioritized, actionable recommendations that improve usability, engagement, and conversion.
Trusted across industries
About UXellence
UXellence was founded by Matthaios Mantzios, a UX design leader with 18+ years of experience building human-centered digital products.
Matthaios has worn most hats in this field—researcher, architect, designer, manager—and that breadth is what UXellence brings to every engagement: a holistic view of user experience that connects research, strategy, design, and delivery.
Mentoring and Writing
Beyond client work, UXellence is committed to advancing the UX community. Matthaios writes about the evolving UX landscape—from AI's impact on design to inclusive UX strategy—for UX Planet, Fast Company, and The Decision Lab .
His book, Web and Mobile Accessibility: A Comprehensive Guide, is available on Amazon.
Matthaios also mentors emerging designers on ADPlist, helping the next generation build careers rooted in user-centered design
Skills
- UX/UI Design
- Information Architecture (IA)
- Accessibility Consultation
- Usability Testing
- UX Research
- User-Centric Design Strategies
- Interactive Design
- Wireframing & Prototyping
- User Testing & Feedback Analysis
- Trend Analysis & Forecasting in UX/UI
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