NVFreelancer profile translated to English.
Back to original languageAbout Nelson
I am a Full-Stack Developer specializing in building complete applications from start to finish: design, development, backend, frontend, database, deployment, and maintenance. I work with modern technologies like Vue 3, React, Next.js, TypeScript, Python/Flask, and PostgreSQL, creating robust, fast, and scalable solutions.
I can help you launch a real project into production, following a clean and modular architecture (DDD, near-hexagonal approach, clear separation by domains and layers), ensuring maintainability, scalability, and easy onboarding for any future team.
I have experience deploying in multiple environments (dev, pre, production) and configuring CI/CD pipelines, automating build, test, and release processes, and ensuring frictionless continuous delivery. I also work with VPS, Vercel, Render, Fly.io, and cloud databases like Neon.
I place great importance on code quality and testing: Vitest, Jest, React Testing Library, Pytest, as well as integration tests and consistent validations between frontend and backend.
In the web area, I implement technical SEO: Google indexing, dynamic metadata, Open Graph, sitemaps, performance, Lighthouse, semantic structuring, and optimizations to improve ranking. I can also manage Google Maps indexing and high-performance configurations for your website or platform.
I have developed SaaS platforms, administration panels, dynamic blogs, authentication systems with JWT + CSRF, private areas, multi-language support, and complete production-ready web applications.
If you need a developer capable of handling the entire cycle: analysis, architecture, development, testing, deployment, and maintenance, I will be happy to help you take your project to the next level.
English
Native or bilingual
Catalan
Native or bilingual
Spanish
Native or bilingual
Remote only
Primarily works remotely
Experience
- The Roas FactoryFull-Stack and SEO DeveloperDEFENSE AND MILITARYJanuary 2025 - Today (1 year and 5 months)Madrid, SpainDevelopment of the corporate website with React.js, React Router, React Helmet, optimized with technical SEO (dynamic metadata, Open Graph, GTM). Within the agency, I participate in the creation of digital platforms for different sectors, adapting architecture and technologies according to client needs. I use proprietary reusable templates and clear documentation to accelerate development and facilitate maintenance.
- EsstupendasBeautyNovember 2025 - Today (7 months)Tarragona, SpainArchitecture with Next.js 15 + Tailwind + Zustand and Flask + PostgreSQL; local SEO with dynamic routes per city/service; integration with Booksy for reservations and private area with promotions.
- Boost A ProjecFull-Stack DeveloperJanuary 2025 - September 2025 (8 months)Las Rozas de Madrid, SpainModular architecture with Next.js App Router (frontend) and Flask (backend); admin panel with CRUD for articles and manual HTML editor; 270 total tests (187 frontend + 83 backend, 93% backend coverage); advanced security with JWT in HttpOnly cookies + CSRF.
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Education
- Architecture, Urbanism, and Strategic Infrastructures.Arquitectura, urbanismo e infraestructuras estratégicas.
- Full-Stack Development4Geeks Academy Spain2024Desarrollo Full-Stack