Carlos Mario Gonzalez Sarmiento

Full-Stack Developer

Buenos Aires, Argentina

About me

Full-Stack Developer specialized in web, mobile, and backend development, proficient in modern technologies such as React, React Native (with Expo), Node.js, NestJS, PostgreSQL, MongoDB, SQLite, and Docker. Passionate about building efficient and scalable solutions, combining strong technical knowledge with hands-on experience from multiple personal and collaborative projects. Committed to code quality, continuous improvement, and delivering results that make a real impact.

Work experience

Neworld

FullStack Web Developer

February 2025 - July 2025

I developed a complete online store, implementing a payment gateway with MercadoPago. I used SvelteKit to build both the frontend and backend, and managed the PostgreSQL database with Prisma as the ORM. The goal was to create a robust and scalable e-commerce platform.

Education

Web and Mobile Development - Self-taught

August 2022 - July 2025

Intensive training in web and mobile application development through: - Study of official technical documentation - Development of practical projects - Use of modern development tools (Cursor AI) - Continuous learning through specialized digital resources

Projects

Neworld online store •

Development of a fully functional technology store, with integration of the MercadoPago payment gateway to securely process transactions.

Frontend Web DevelopmentBackend DevelopmentSveltekit
Helpy •

A web platform to connect users with local professionals via an interactive map, making it easy to find and contact experts to solve service needs quickly and efficiently.

Full-Stack Web DevelopmentInteractive MapsGeolocation
ChatGPT web •

ChatGPT clone with advanced features, including image and audio generation by integrating with the OpenAI API.

Frontend Web DevelopmentReact
ChatGPT mobile

Mobile version of the ChatGPT clone, developed with React Native and Expo, enabling image and audio generation on mobile devices.

Mobile DevelopmentReact native & Expo
ChatGPT backend

RESTful API built with NestJS to manage client requests and integration with the OpenAI API, serving as the application's brain.

Backend DevelopmentNestJsOpenAi
Teslo store mobile

E-commerce mobile application for a clothing store, developed with React Native and Expo to provide a seamless shopping experience.

Mobile DevelopmentReact Native & Expo
Teslo store web •

A complete e-commerce web platform for a clothing store, built with Next.js and Tailwind CSS for optimal performance and a modern design.

Full-Stack Web DevelopmentNextJs & Tailwind
Teslo store backend

Robust REST API developed with NestJS, designed to manage products, orders, and user authentication for the Teslo platform.

Backend DevelopmentNestJs
Chat to your pdf

Web application that allows users to interact with their PDF documents, asking questions and getting answers based on the file's content.

Full-Stack Web DevelopmentNextJs & Tailwind
Spotify clone

Functional Spotify clone that allows browsing albums and playing songs, built with Astro, React, and Tailwind for a fast and modern interface.

Full-Stack Web DevelopmentAstro, React & Tailwind
Kotflix

Mobile application to browse movies currently in theaters, view details like synopsis and cast. Natively developed for Android with Kotlin.

Mobile DevelopmentKotlin & Android
Todos

Task management mobile application with user authentication and cloud data storage, using Firebase and React Native.

Mobile DevelopmentReact Native & ExpoFirebase

Skills

HTML
CSS
Tailwind
TypeScript
Nest
Expo
Kotlin
Node
Postgresql
Git
GitHub
Next.js
Svelte
React