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.

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

Research

Analyze product, objectives, competition and industry through interviews, user research...

Prototype

Transform research insights into wireframes and user flows aligned with business and development.

Design

Design hi-fidelity interfaces and functional prototypes, improving user interaction and experience.

Validation

Test and optimize with stakeholders using user feedback and metrics.

Iteration

Iterate on designs and prototypes, optimizing experience and maximizing usability.

Let's talk about me

Guillermo Sánchez Product designer

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.

Let's talk about you

E-mail: guillermosanchez_uxui@outlook.com

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