Álvaro Castaño's resume
UI designer and engineer with over 20 years of experience, having worked for agencies, startups, scale-ups, and global brands. I bridge the gap between design and front-end development, creating seamless user experiences that are both visually stunning and technically robust.
Experience
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UI Developer — Nestlé Nespresso S.A.
– Present · Full-time contractor · Remote
Developed React and vanilla JS components, design tokens, and SVG assets for Nespresso HQ's Design System squad. Also developed React-based blocks and panels to build pages in the ecommerce globally.
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Front-End Lead — Siroko
– · Full-time · Remote
Led a team of 4 designers and front-end developers; managed delivery, team development, and coordination with the CEO and other leads.
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Designer & UI Developer — Siroko
– · Full-time · Gijón, Spain
Web and app UI design alongside UI development across Twig, Blade, WordPress, email templating, and Shopify.
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Designer & Co-founder — Klokut Watches
– · Full-time · Barcelona, Spain
Designed watches, website, and marketing materials; built the online store for this e-commerce startup.
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Designer & Co-founder — Cronnection
– · Full-time · Miami, US & Barcelona, Spain
Branding, illustration, responsive web design, iOS app design, wireframes, and concepts for an internet startup.
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Freelance Web Designer & Developer — vivaestudio
– · Freelance · Oviedo, Spain
200+ projects spanning web design, branding, illustration, and WordPress theme development.
Skills & tools
Development
- React
- Vite
- Storybook
- HTML & CSS / SCSS modules
- Vanilla JS
- Vitest
- GitHub Actions
- Web Performance
- Accessibility
- On-site SEO
- Design Systems
Design
- Figma
- UI & UX Design
- Design Systems
- Branding
- Illustration
- A/B Testing
- Prototyping & Wireframing