Port-
Folio
Product Design and UX/UI
for Complex Digital
Ecosystems
Guillermo Sánchez, 8+ years crafting and optimizing Experiences, UX, UI and Design Systems for clients like PreZero, Cepsa, Ferrovial, and Engie.
01
End-to-end cross-device platform
User-centered design across web, mobile, and desktop.
1,000+ companies · 80% interface adoption
02
Scalable Design System in Figma
Streamlining styles and boosting visual consistency.
Up to 35% faster design and development cycles
03
Responsive mobile app for training
Hands-on training with industrial machinery.
20% maintenance time reduction.
04
Corporate Website UX/UI Redesign
Research, Prototyping, Validation, Development and Iteration.
+10% in Monthly Sign-Ups.
05
Desktop App for Incident Management
Internal Tool for Tunnel Inspections
50% reduction in tunnel closure time.
06
E-commerce and Dashboard for B2B SaaS
E-commerce design and account management.
Freeing up to 40% of the commercial team’s workload.
Design approach
1
Research
Analyze product, objectives, competition and industry through interviews, user research...
2
Prototype
Transform research insights into wireframes and user flows aligned with business and development.
3
Design
Design hi-fidelity interfaces and functional prototypes, improving user interaction and experience.
4
Validation & Iteration
Test, optimize and iterate with stakeholders using user feedback and metrics.
Let's talk about me
During my eight years of experience in digital product design and user experience (UX/UI), I have specialized in scaling design in complex environments, applying user-centered design, design systems, and UX strategy.
I enjoy working in multidisciplinary and cross-functional teams, collaborating closely with business, developers, technology, product owners, and other stakeholders.
I have created international strategic solutions in design and digital products for companies such as Prezero, Cepsa, Ferrovial, and Engie, applying agile methodologies (Scrum, Lean UX).
I am fascinated by how the best design is invisible, which is why I am highly experienced with UX research techniques such as customer journeys, user interviews, surveys, usability testing, and A/B testing, always measuring impact through metrics and KPIs.
In my projects, I combine UI design, interaction design, prototyping in Figma, and wireframes, with a strong focus on accessibility, responsive design, and visual consistency. I apply user-centered design methodologies from research and ideation to prototyping, usability testing, iteration, and final implementation.
