Ubirajara LUCENA
Senior Product Designer & UX Researcher

With a background in cognitive ergonomics and product design, I have been working in the field of user experience for over 20 years.

User‑centred design and human factors are the fundamentals of my work, and I am driven by the desire to improve people's lives by delivering high-quality experiences on the products and services they use.

One of the things that I particularly enjoy about my job is taking into account the specific constraints of a project and facilitating the implementation of concrete solutions, from start to finish.

I have experience with all stages of the software development lifecycle: from preliminary UX research and task analysis to dynamic prototyping, usability testing, and front-end development.

More recently, I have been deeply involved in AI-based eHealth and HealthTech. My focus was on translating real user needs into logic and UX workflows for AI assistants, ensuring that advanced technology functioned as an intuitive and efficient tool for healthcare professionals.

Download my CV (French, PDF)

Core Expertise

  • Cognitive Ergonomics & Heuristic Evaluation

    Applying human factor principles (ISO 9241, Nielsen, and Bastien & Scapin) to reduce mental workload. Expertise in defining experimental protocols, including eye-tracking based testing.

  • UX Research & Usability (Multilingual)

    Leading full-cycle research: from contextual inquiries and participant recruitment to analysis and reporting. Conducted over thousands of hours in English, French, and Portuguese for public and private sectors.

  • Inclusive Design & Web Accessibility

    Expert in auditing and implementing WCAG 2.2 / RGAA 4.1 / WAI-ARIA standards. Proven track record managing accessibility for large-scale public institutions, including the French National Employment Agency and the Central Bank of Brazil.

  • High-Fidelity Design & Prototyping

    Architecting complex interaction schemes and design systems. Expert use of Figma, Axure, and Sketch, transitioning seamlessly from paper wireframes to high-fidelity, production-ready prototypes.

  • Design Strategy & Front-end Synergy

    Bridging the gap between design and code with a solid background in HTML5, CSS3, and JS. I ensure design feasibility and interoperability within complex enterprise architectures.

  • AI & Prompt Engineering

    Designing conversational flows and system prompts for context-aware AI tools, ensuring emerging technologies meet rigorous human-factor standards.

Contact me