Mario Carlos Roca Peñafiel

I am a senior frontend developer with over 10 years of experience, specializing for over 6 years in JavaScript technologies such as React.js, React Native, Next.js, Astro, Vue, and Nuxt.js with TypeScript. Residing in Spain, I work fully remotely. I build scalable, high-performance web applications; my approach combines engineering and design.

For global state management in the React ecosystem with Zustand, Redux Toolkit, React Query, TanStack Store, or Context API. In Vue or Nuxt.js, I prefer Pinia. Both with TypeScript. However, MobX or Signals are also excellent alternatives.

Regarding styling, I use modern pure CSS (nested) or Sass, leveraging their new features, or CSS-Modules, both under BEM. However, many projects have required TailwindCSS and/or ShadCN UI. Likewise, I have experience using Styled-Components.

I structure based on hexagonal architecture (Domain, Application, Infrastructure) and componentize in a monorepo or separate repo under Atomic Design or Domain Driven, with respective documentation in Storybook and testing with Testing Library.

For unit testing, I use Vitest.

For agile backend, I usually use Headless CMS like Strapi, GraphCMS, or Wordpress through a plugin that exposes its Rest or GraphQL API, or SaaS like Supabase or Firebase.

I have many years of experience working on monolithic projects from the frontend side, using Symfony, Ruby on Rails, Django, Spring Boot, and WordPress. For various sectors, Retail, Real Estate, Fintech, and Digital Marketing.