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marcuscastrodev/README.md

🇺🇸 English · 🇧🇷 Português · 🇪🇸 Español

Hey, I'm Marcus Castro 👋

Web & full-stack developer · Product-minded builder

I turn business problems into useful, well-designed digital products.

📍 Valencia, Spain  ·  🌍 Open to international and remote opportunities

View portfolio Explore projects Featured case Live project


About me

I'm a web and full-stack developer with a background in digital marketing, UX, and project management. I work across the product journey: understanding the problem, shaping the experience, building the interface, connecting data, testing important flows, and shipping the result.

My portfolio spans a multi-tenant SaaS product, a content and commerce platform, a custom WordPress newsroom, and conversion-focused web experiences.

My perspective: good software should serve both the people using it and the business behind it.

Core toolkit

Frontend: HTML · CSS · JavaScript · TypeScript · React · Next.js · Tailwind CSS
Backend & data: Node.js · PHP · WordPress · PostgreSQL · Supabase · REST APIs
Quality & delivery: Git · Docker · Netlify · Render · Playwright · pgTAP

Featured work

Project What I built Stack & links
🚀 MOVA, by EMI
Multi-tenant SaaS
A workspace-based product for clients, projects, Kanban tasks, calendars, collaborators, and financial workflows. It includes role-based access, PostgreSQL Row Level Security, database business rules, and automated testing. Next.js · TypeScript · Supabase · PostgreSQL
Engineering case study · Private demo
🧭 Entre Destinos
Content & commerce platform
A statically generated travel platform with a Decap CMS editorial workflow, blog and category generation, clean URLs, structured data, sitemap automation, Mercado Pago checkout, webhook delivery, and automated tests. Node.js · Netlify · Decap CMS · Mercado Pago
Case study · Live website · Private production source
📰 Lícia Fábio
News & editorial platform
A custom WordPress theme, editorial workspace, and reusable content plugin with REST API integration, capability-based permissions, revision checks, and publishing workflows. PHP · WordPress · JavaScript
Source & case study · Live website
🩺 RedlineMD
UX/UI design challenge
A mobile-first landing-page redesign focused on message clarity, trust, pricing visibility, and a lower-friction physician contract-review journey. UX/UI · Responsive design · Conversion strategy
Case study

More selected work

  • HQBeds web experiences: multilingual hospitality landing pages, research-led lead generation, and conversion-oriented interfaces.
  • MOVE LAB: a framework-free responsive landing page with accessible navigation and vanilla JavaScript interactions.

Some client and product work is presented through public case studies while production source, credentials, customer information, and proprietary assets remain private.

How I approach development

  • Product thinking: connect technical choices to user needs and business outcomes.
  • Frontend craft: build responsive, accessible interfaces with clear information hierarchy.
  • Full-stack engineering: work with authentication, authorization, APIs, relational data, and database-level rules.
  • Responsible delivery: document trade-offs, protect sensitive environments, test critical flows, and ship maintainable solutions.

What I'm looking for

I'm open to web and full-stack development roles, design-engineering opportunities, international remote collaborations, and selected freelance projects.


Let's build something useful.

Explore the projects above and follow their documentation, live experiences, and engineering decisions.

Product thinking, technical execution, and digital strategy in one practice.

Pinned Loading

  1. mova-showcase mova-showcase Public

    Full-stack SaaS for managing clients, projects, tasks and finances. Built with Next.js, TypeScript and Supabase.

  2. entre-destinos-showcase entre-destinos-showcase Public

    Content platform combining custom publishing workflows, SEO, digital services and e-commerce.

  3. licia-fabio-news-platform licia-fabio-news-platform Public

    Custom WordPress news portal with an editorial dashboard, REST API integration and modular PHP plugins.

    PHP

  4. redlinemd-challenge redlinemd-challenge Public

    Mobile-first landing page redesign focused on UX/UI, responsive interfaces and conversion strategy.

    HTML

  5. hqbeds-web-experiences hqbeds-web-experiences Public

    Conversion-focused landing pages and multilingual web experiences for the hospitality industry.

  6. move-lab move-lab Public

    Responsive marketing landing page built with HTML, CSS and vanilla JavaScript, featuring accessible navigation.

    HTML