Carlos de Leon
Specializing in Next.js, MongoDB & Firebase integrations
Hi there! I'm Carlos De Leon, a Software Engineer currently completing a development internship at a tourism technology company serving Mexico and the Dominican Republic. Previously, I spent 10+ years as a COO and General Manager in the Hospitality Industry, where I successfully led teams of 100+ professionals and managed operations generating $1.5M USD in monthly revenue with 30% profit margins.
Today, I’m focused on building modern, scalable, and responsive web applications with React, Next.js, Astro, Tailwind CSS, and Firebase, with a strong emphasis on clean code, performance, and intuitive UI/UX. My leadership background adds proven strengths in project management, data-driven decision making, and thriving under pressure which I bring to every technical challenge I take on.
Experience
Frontend Developer
Tourism Tech Solutions • Mexico & Dominican Republic
- Currently in a development internship building production-ready applications for airport and e-commerce clients using React, Tailwind CSS, Next.js, ASTRO and REST APIs.
- Led the implementation of a dynamic coupon system with Google Wallet and Apple Wallet integration, collaborating with backend teams to deliver seamless payment flows.
- Self-taught developer advancing through hands-on projects, technical documentation, and structured online learning while pursuing formal certification.
- Multilingual communicator: Spanish (native), English (C1), Portuguese (B1) — enabling effective collaboration across international teams and clients.
- Leverage 10+ years of operations leadership to drive technical projects with clear architecture decisions, stakeholder alignment, and consistent delivery.
Stack
Mainly working with:
- Next.js
- Javascript
- React
- Tailwind
Also building with
- Astro
- React
- Tailwind
Tools & Integrations
- HTML
- CSS
- Vite
- Firebase
- Shopify
- Postman
- i18Next
- Figma
- Framer Motion
- Shadcn/UI
- Prettier
- Git
- GitHub
- Linux
- NPM
- Vercel
Projects
ThreadHive, Community Platform
A next-generation community platform combining social discussion with gamification and complete brand identity. ThreadHive demonstrates end-to-end product development from strategic naming and visual design to full-stack implementation. Features include: WoolPath achievement system with 200+ custom-designed badges, NSFW content detection using TensorFlow.js, real-time notifications via Firebase, rich text editing with Tiptap, comprehensive moderation tools with role-based access, and privacy-controlled communities. Tech stack: Next.js 15, React 19, MongoDB, Redux + Zustand + TanStack Query for state management, JWT authentication, and Vercel deployment. Includes complete custom branding (mascot design system, naming strategy, visual identity) conceptualized and executed alongside technical development.
Ecommerce Next.js, Shopify Headless API
Modern, responsive e-commerce storefront built with Next.js, Tailwind CSS, and Shopify Storefront API. Features clean UI, advanced product browsing, customer reviews with images, wishlist via Firebase, and scalable PWA support with offline use and iOS 'Add to Home Screen' install.