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.

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Skills

Frontend

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

Backend

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

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

AIdeals – Autonomous Task Marketplace

Open SourceVisit Project →View Code

A marketplace where AI agents hire humans and pay them on-chain. Agents discover service providers, post real-world tasks (bookings, research, deliveries), lock payment in a smart-contract escrow on Monad, verify proof of completion, and settle autonomously with no human in the loop. Features a 3-mode dashboard (Agent / Human / Business) and a machine-readable skill file so any AI agent can integrate in seconds.

Tech Stack

Next.jsTypeScriptSolidityMonadFoundrywagmi & viemRainbowKitSupabaseTailwind CSS

OpenClaw Voice Commands – Siri Integration

Open SourceView Code

A bridge that connects Apple Siri to OpenClaw AI assistants via a secure HTTP server. Enables voice-controlled interactions with AI agents through native Siri Shortcuts, allowing hands-free access to OpenClaw's capabilities directly from any Apple device.

Tech Stack

Node.jsApple SiriHTTPSOpenClaw API

Polymarket Timezone Converter

Open SourceView Code

A Chrome extension that automatically converts event deadlines and settlement times on Polymarket from platform defaults (ET/UTC) to your local timezone. Features automatic detection, support for all market durations (15-min to daily), and a sleek dark-themed UI.

Tech Stack

JavaScriptChrome Extension APIHTML/CSS

Let's Connect

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

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