Hello, I'm Charlie Rios. I'm a Senior Full-Stack Software Engineer based in Amsterdam.
I build products end-to-end — from UI architecture to APIs, infra, and production deployments.
About me
I build products end-to-end: from UI architecture and design systems to APIs, infra, and production deployments. I've led frontend teams as Frontend Lead, owned features as a Product Engineer, and shipped across web, mobile, and cloud. Nowadays I'm growing into a native AI developer, building intelligent systems that reach real users.
What I bring: strong product sense · scalable React/TypeScript frontends · full-stack ownership · AI-native tooling
Featured projects
A selection of products I've designed, built, and shipped — from native macOS apps to full-stack web platforms.
My skills
- HTML
- CSS
- JavaScript
- TypeScript
- React
- Next.js
- Node.js
- Git
- Tailwind
- Prisma
- MongoDB
- Redux
- GraphQL
- Astro
- Express
- tRPC
- Python
- Shadcdn
- Framer Motion
My Experience
Frontend Lead | Product Engineer (React / Next.js)
Timbal AI
Barcelona, Cataluña, España
November 2025 - Present (8 months)
- Leading frontend development of a core AI product using React and Next.js.
- Defining the product's look, feel, and user experience directly in code.
- Collaborating with founders to shape product vision and strategy.
- Building impactful, high-performance interfaces with autonomy and ownership.
Frontend Lead Developer (React)
Aplicaciones Web Mardo
Mataró, Cataluña, España
November 2024 - November 2025 (1 year 1 month)
- Development and maintenance of modern web applications using React 19, Node.js 23, React Router v7, React Bootstrap, Vite, and Axios.
- Creation and integration of RESTful APIs with CRUD architecture.
- Implementation of Server-Side Rendering (SSR) using Next.js and advanced React Router.
- Collaboration with multidisciplinary teams to deliver scalable, accessible, and high-performance solutions, applying WebSockets and the latest WCAG accessibility guidelines.
Fullstack Developer & UI/UX Designer
Pixelimperium
Eivissa/Ibiza, Islas Baleares, España
August 2023 - September 2024 (1 year 2 months)
- Full-stack development using React, Next.js, TypeScript, Node.js, Python, and Java.
- Design and deployment of eCommerce platforms on AWS, Vercel, Netlify, and Cloudflare Pages.
- Creation of UI/UX interfaces, custom APIs, and solutions with SQL databases.
- Experience in Blockchain and Web3 (Solidity, Ether.js) for decentralized applications.
Senior Frontend Web Developer
Pixelimperium
Eivissa/Ibiza, Islas Baleares, España
September 2022 - August 2023 (1 year)
- Architecting high-performance, accessible web applications with React, Next.js, and TypeScript for robust code quality.
- Led development of complex UI/UX interfaces and component libraries, ensuring WCAG accessibility compliance.
- Optimized frontend performance and state management by leveraging Vite for rapid bundling and defining efficient RESTful API consumption via Axios.
- Implemented WebSockets for real-time data flow, significantly enhancing application responsiveness and user experience.
- Managed seamless deployment and hosting of applications on platforms including Vercel, Netlify, and Cloudflare Pages.
IT Consultant & Web 3.0 / Apps Developer
DR FINANTRUST
Barcelona, Cataluña, España
May 2022 - September 2022 (5 months)
- Development of trading software for currency and stock markets using React, React Native, Node.js, and Java.
- Work with AWS, Oracle Cloud, Cloudflare, and Ether.js to build secure and scalable systems.
- Training and mentorship of the junior team, improving productivity and adoption of internal tools.
IT Consultant & Web Developer
Businessprinter, S.L.
Barcelona, Cataluña, España
November 2020 - May 2022 (1 year 7 months)
- Responsible for a 5-person IT team, managing client applications, websites, and systems using React, Angular, Node.js, PHP, Java, and Swift.
- Delivery of B2B solutions, strengthening client relationships and generating add-on sales for IT services.
- Full-stack development and management within cloud environments (AWS).
Web Developer (Junior)
Businessprinter, S.L.
Barcelona, Cataluña, España
June 2020 - November 2020 (6 months)
- Assisted in the development of client websites and applications using React, Angular, and Node.js under the guidance of senior developers.
- Focused on front-end feature implementation and bug resolution, contributing to the deployment of new B2B solutions.
- Maintained and updated legacy code in PHP, Java, and Swift to ensure system stability and cross-platform compatibility.
- Gained foundational experience in full-stack development principles and contributed to basic cloud environment tasks on AWS.
Software Engineer (Junior)
Magnum Object, S.L.
Cornellà de Llobregat, Cataluña, España
July 2018 - June 2020 (2 years)
- Development and maintenance of websites, evolving toward React with strong foundations in JavaScript, HTML/CSS, and SQL.
Systems & Networks Admin
Magnum Object, S.L.
Cornellà de Llobregat, Cataluña, España
August 2017 - July 2018 (1 year)
- Comprehensive IT department support: system configuration, server/network management, hardware maintenance, SAP and RMA.
- Multi-platform support (Windows, macOS, Linux) for B2B clients.
Systems & Networks Admin (Junior)
Magnum Object, S.L.
Cornellà de Llobregat, Cataluña, España
May 2017 - August 2017 (4 months)
- Supported systems, networks, and hardware maintenance for B2B clients while learning core IT infrastructure practices.
Certificates
Smart Contracts with Applications in FSC
Advanced Blockchain Skills Certificate
MiCA Regulation and CBDC's Certificate
Ethical & Governance in Blockchain FGC's
Google Ads Apps Certificate
Bitcoin101 Certificate
Mozilla's JavaScript Certificate
Digital Forensics Certificate
Diploma in Data Analytics
Oxford's Data Analytics
Blockchain Developer Training
Introduction to MERN Stack
Network Defense Certificate
Jira Advanced Certification
Advanced Web Analytics
Advanced Content Marketing
Contact me
Please contact me directly through this form.