Marcio Barbosa
Full-Stack Developer

A Brazilian lifelong learner with a passion for problem-solving and an ability for rapid learning, I'm driven by curiosity about innovation and emerging technologies such as Artificial Intelligence and blockchain.

𝕏

Skills

Frontend

  • React & Next.js
  • TypeScript & JavaScript
  • Tailwind CSS
  • Electron (macOS/Windows apps)
  • React Native

Backend

  • Node.js & Express
  • REST APIs & WebSockets
  • MongoDB
  • Python
  • NestJS

AI & ML

  • OpenAI and other LLM Integrations
  • AI Agents
  • Speech-to-Text
  • Text-to-Speech
  • MCP

DevOps & Deployment

  • Docker & Docker Compose
  • Git, GitHub Actions / CI-CD
  • Vercel / Netlify / Heroku
  • Nginx & Reverse Proxy
  • Linux Server Basics

Blockchain

  • Solidity (Smart Contracts)
  • Ether.js & Web3.js
  • IPFS
  • The Graph
  • Chainlink

Soft Skills

  • Adaptability & Quick Learning
  • Feedback Receptiveness & Growth Mindset
  • Emotional Intelligence
  • Problem-Solving & Analytical Thinking
  • Product vision

Experience

Full-Stack Developer

•Independent Contractor / Freelancer
Jan 2021 - Present•Remote

Designing and building diverse software solutions including web applications, AI-enhanced tools, data analytics platforms, blockchain solutions, and automation systems.

Technologies

JavaScript/TypeScriptReact & Next.jsNode.jsPythonMongoDBOpenAI APISmart ContractsSolidityEther.jsWeb3.jsRest APIWebhooksGitDocker

Full-Stack Developer

•Ethereum FoundationView Project →
Mar 2023 - Nov 2023•Remote

Engineered privacy-focused web tools for the Zuzalu Montenegro community project, implementing authentication systems and event management features.

Technologies

Zero-Knowledge ProofsSemaphore ProtocolNext.jsReactTypeScriptNode.jsTailwind CSSSupabase

Attorney

•Legal Practice
2013 - 2018•Brazil

Led complex legal cases in public law and constitutional rights, developing innovative solutions through systematic problem analysis. This experience in breaking down complex problems and identifying root causes directly translates to my current work in software architecture.

Skills

Complex Problem SolvingAnalytical ThinkingAttention to DetailTechnical DocumentationProcess OptimizationTeam CollaborationPublic Speaking

Side Projects

AI Comparison

Open SourceVisit Project →

An open-source web application for comparing responses from different AI models in real-time. Features side-by-side comparison of multiple AI models (OpenAI, Anthropic, Google AI), adjustable temperature settings, secure API key management, and real-time response streaming.

Tech Stack

Next.js & TypeScriptReactTailwind CSSShadcn UIOpenAI SDKAnthropic AI SDKGoogle Generative AI SDK

Intocoin - AI Analytics Platform

Visit Project →

Intocoin tracks real-time tweets from a curated list of top crypto 𝕏/Twitter profiles, analyzing market trends and sentiment. It delivers valuable insights and analysis, curating the latest discussions, and providing users with key data to make smarter, informed investment decisions.

Tech Stack

Next.js & TypeScriptMongoDBNode.jsExpress.jsMVC patternHerokuRESTful API

Note AI - Meeting Summarization App

Private Project

A macOS desktop application that uses AI to automatically capture and summarize online meetings. The app employs advanced AI agents to extract key points, action items, and decisions from meetings. Not publicly available, but can be showcased upon request.

Tech Stack

TypeScriptElectronC++AI AgentsOpenAI APIWebSocketsLangGraphPostgreSQLPrisma ORMDocker

Let's Connect

Let's collaborate on innovative solutions that push the boundaries of technology and creativity.

𝕏