# caiothedev — portfolio > Software Engineer, FullStack Developer and UX/UI | Next.js, Node.js, Tailwind CSS, JavaScript, TypeScript and React Caio Oliveira, known online as caiothedev, is a software engineer, full-stack developer and UX/UI designer based in Salvador, Bahia, Brazil. He has spent more than five years building digital products end to end: research and interface design in Figma, front-end implementation with Next.js, React and TypeScript, back-end services in Node.js, Java and PostgreSQL, and the deploy that puts everything in production. This portfolio gathers those projects, the stack behind them and the way he works. It is published in Portuguese, English and Spanish from the same set of URLs. ## When to use this site - Deciding whether Caio Oliveira fits a web project: hiring, freelance work or a contract that mixes interface design with full-stack development. - Answering questions about his stack, years of experience, location, availability and the kind of product he ships. - Pulling the details of a specific case: every project has its own page under /works with year, category, stack and a written summary. - Getting in touch: LinkedIn is the fastest channel for work inquiries and the resume is available in three languages. - Not a fit for generic web development tutorials or framework documentation: this site describes one person's work, not a product API. ## What I do - Web development: landing pages, institutional sites and web applications built with Next.js, React and TypeScript. - Interface design: UX and UI work in Figma, from the first wireframe to a design system, with responsive and accessible screens. - Visual identity: branding, logo and the visual language that keeps a product consistent across every touchpoint. - Back end and APIs: Node.js, Java, Go and PostgreSQL, including the data model and the integrations a product depends on. - Full delivery: one person from the first Figma screen to the application running in production, with no hand-off gaps. ## Stack Next.js, React, TypeScript, JavaScript, Tailwind CSS and Framer Motion on the interface. Node.js, Java, Go, SQL and PostgreSQL on the server. Figma, Adobe Photoshop and Adobe After Effects for design and motion. ## Code and design in the same place - 4+ — Years building digital products - 20+ — Projects delivered - Salvador, Brazil ((UTC−3)) — Available for new projects ## Pages on this site - [About](https://caiothedev.com/about): Who Caio Oliveira is: background, interests and the technologies behind the work. - [Works](https://caiothedev.com/works): Works and projects by Caio Oliveira — websites, web systems, apps, APIs, UI/UX interfaces and visual identity. - [Services](https://caiothedev.com/services): All my services in web development, software architecture, interface design, and more. ## Selected works - [Controller Esp32 + Display128x64](https://caiothedev.com/works/controller-esp32display128x64): 2026 · Personal project / Studies — Mirroring the PC screen to a 128×64 OLED display connected to an ESP32 via USB. - [Ciné Nova Bossa](https://caiothedev.com/works/cinenovabossa): 2026 · Enterprise - [Volkswagen Brasil](https://caiothedev.com/works/vw-br-website): 2026 · Personal project / Studies — A corporate website inspired by Volkswagen Brazil. - [TocaCine](https://caiothedev.com/works/tocacine): 2025 · Enterprise - [Urbanpay](https://caiothedev.com/works/urbanpay): 2025 · Personal project / Studies — Structure of a fintech and financial services platform. - [Lucy](https://caiothedev.com/works/lucy-ia): 2025 · Personal project / Studies — A multi-agent artificial intelligence platform designed to solve different types of problems. - [Crabfy](https://caiothedev.com/works/crabfy): 2025 · Personal project / Studies - [VyseSystem](https://caiothedev.com/works/vysesystem): 2025 · Personal project / Studies — POS system, web, app, software, and business analytics platform. - [Vtrack](https://caiothedev.com/works/vtrack): 2024 · Enterprise — Workout tracking platform for gyms, from interface design to the API. - [pythoncraft](https://caiothedev.com/works/pythoncraft): 2024 · Personal project / Studies — A clone of the Minecraft Java game, developed in Python. - [snakegame](https://caiothedev.com/works/snakegame): 2024 · Personal project / Studies — The classic pixel-art Snake game on the web. - [Roadsvisuals](https://caiothedev.com/works/roadsvisuals): 2024 · Personal project / Studies — Car simulator built with Three.js. - [EC2K - Landing Page](https://caiothedev.com/works/ec2kmedia): 2023 · Enterprise — Corporate website for the marketing agency EC2K Media. - [Abrigo Lar Irmã Benedita Camurugi](https://caiothedev.com/works/larirmabenedita): 2023 · Enterprise — Website of the Lar Irmã Benedita Camurugi shelter. ## Contact and profiles - [Caio Oliveira on Instagram](https://instagram.com/caiothedev) - [Caio Oliveira on GitHub](https://github.com/caiovisuals) - [Caio Oliveira on LinkedIn](https://linkedin.com/in/caiothedev) --- [HTML version](https://caiothedev.com) Every page here also answers to `Accept: text/markdown` and to the same path with a `.md` suffix.