Freelancer profile translated to English.

Description

Full-Stack Senior & Product Visionary

12+ years | Remote (Spain)

Looking for a developer or a tech partner who understands your business? I lead the complete product lifecycle, bridging the gap between design, development, and business with a focus on conversion, accessibility, and technical SEO.

THE TRIPLE DIMENSION: BRANDING, UX/UI, AND CODE

Product & Conversion:Design from branding and logo to high-fidelity UX/UI interfaces. If you're launching a SaaS or Dashboard, I guarantee WCAG and A11y standards. For positioning, I optimize metadata, structured data, and Core Web Vitals to the millisecond (LCP, INP, CLS, FCP, TBT).
Expert Frontend:Absolute mastery of React.js, React Native, Next.js, Astro, and Vue/Nuxt.js with TypeScript. Specialist in Monorepos, Hexagonal Architecture, and clean componentization with Atomic Design.
Expert Backend:Robust engineering in Node.js (TypeScript) and PHP, structured under Hexagonal Architecture (Domain, Application, Infrastructure). Projects in Next.js with Prisma ORM and solutions with Headless CMS (Strapi, WordPress API).

SOFTWARE STRUCTURE & QUALITY

State Management: Advanced according to the ecosystem. For React: Zustand, Redux Toolkit, or React Query. For Vue/Nuxt.js: Pinia.
Styling & QA: Pure CSS/Sass (BEM methodology), TailwindCSS, and ShadCN UI. Code documented in Storybook and tested with Vitest, Jest, and Testing Library.

ARE YOU A RECRUITER?

Although I master Full-Stack, I integrate perfectly as an Expert Frontend in React. My focused stack: React.js, TypeScript, Monorepos, Redux, React-Query, CSS/Sass (BEM), TailwindCSS, Jest, Testing Library, Vitest, and Storybook.

SECTOR EXPERTISE

Fintech, SaaS, E-commerce, Retail, Real Estate, Startups, AI platforms, HR, Insurance, Health, Education, and Incentive Marketing.

I INVITE YOU TO REVIEW MY PORTFOLIO BELOW

I transform complex ideas into profitable, accessible, and scalable products.

Languages

Spanish
Native or bilingual
English
Conversational

Workplace preferences

Remote only

Primarily works remotely

ChangeTheBlock
Frontend Developer
TECH
March 2024 - Today (2 years and 5 months)
- Development of React.js, Next.js applications in TypeScript
- Development of mobile applications with React-Native, using Expo.
- Global state management using Context API, Redux Toolkit, and Zustand.
- Remote state management with React Query, optimizing fetching and cache.
- Development with Next.js and implementation of hexagonal architecture (application, domain, infrastructure).
- Creation of reusable components in Storybook.
- Responsive styles with Tailwind CSS, Sass, and CSS Modules.
- Unit testing using Vitest.
- Development considering WCAG.
- Styling using modern CSS, Sass with CSS Modules, based on BEM.
- Styling with TailwindCSS, Shadcn
- Use of server actions using Next.js.

Clients: Mercedes Benz, Reale, BCG
Next.js TailwindCSS Hexagonal Architecture Typescript React-native
Ayesa - Freelance
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March 2025 - November 2025 (8 months)
Client: Ayesa
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Application for the Basque Government, whistleblower channel.
Development for EJIE, using:
- React.js, Typescript, TailwindCSS
- Hexagonal Architecture (domain, application, infrastructure)
- React-query, Zustand, Tanstack Store
- WGCA accessibility
- Storybook for documentation and testing with testing-library
- Unit tests with vitest
- Design and implementation of the user interface
React.js Typescript Zustand TailwindCSS Hexagonal Architecture
The Cocktail • Freelance
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May 2024 - November 2024 (6 months)
Client: TheCocktail
By Pixie

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- React.js, Typescript, Styled-components, TailwindCss, CSS, CSS-Modules
- Vitest for unit testing
- Hexagonal architecture (domain, application, infrastructure)
- React-query and Zustand for global state management
- Communication with native mobile applications based on events (Bridge)
React.js Typescript TailwindCSS Storybook Next.js