Bringing clarity to complex products.
I’m Helder Martins, a Senior Product Designer creating design systems and AI experiences for financial software.
My approach to AI design focuses on trust: making financial context clear, helping users verify data accuracy, and designing error states that explain what happened and how to recover.
AccessibilityProduct designComplex workflows
SELECTED WORK
Selected case studies
Design systems and AI experiences at Prophix.
One foundation across eight applications
Reduced design time by 60%, with 117 shared components adopted across 10 teams.
Password-protected case study · Password on request by email
Design systems · 2023–present
Helping users work faster with Copilot
Achieved 70% adoption and reduced time spent on planning tasks by 30%.
Password-protected case study · Password on request by email
AI product design · Live product
Explore the project summaries above. Detailed case studies are password-protected. Request access by email.
ACCESSIBILITY + FRONTEND
Connecting component design with implementation.
I bring WCAG 2.2 AA knowledge and hands-on HTML, CSS, and JavaScript skills to design systems work, connecting component design with accessibility requirements and implementation.
WCAG 2.2 AA · HTML · CSS · JavaScript
FROM PEOPLE I’VE WORKED WITH
What colleagues say.
“Helder has a deep understanding of the complexities involved in building AI-driven products.”
Executive Product Leader
September 2026
“Helder is a great team player, always looking for improvements and deeply involved with the team to receive feedback or to help clarify any doubts or suggestions.”
Product Manager, Prophix
August 2024
“Helder is a gifted front-end web developer with a rare combination of resilience, technical knowledge and a user-centered design mindset.”
User Research · Digital Accessibility · Product Strategy
July 2018
Excerpts from LinkedIn recommendations. Read the full recommendations on LinkedIn ↗