# Raphael Serafim — Senior Full-Stack & AI Developer (Toronto / Worldwide)

> Raphael Serafim is a senior full-stack software developer based in Toronto, Canada, who works with clients worldwide (remote, in English and Portuguese). He builds scalable web applications, APIs, real-time systems, and AI solutions — including new AI implementations with Claude Code, AI-powered applications, custom AI model creation, and LLM integrations.

Key facts:
- Role: Senior Full-Stack & AI Developer (TypeScript / Node.js / React / Next.js / Python).
- Location: Toronto, Ontario, Canada — serves the Greater Toronto Area (GTA) and clients worldwide, remote.
- Languages: works and communicates in English and Portuguese.
- Experience: 7+ years, 80+ projects delivered, 50+ cloud deployments, 35+ AI integrations.
- Availability: Open to freelance/contract projects and full-time opportunities, anywhere.

## AI services in demand
Raphael builds the AI solutions businesses are hiring for in 2026:
- AI agent development / agentic workflows (autonomous agents, domain copilots).
- Claude Code development — building AI developer tooling, automation, and agents.
- MCP server development (Model Context Protocol) — connecting tools and data to AI agents.
- RAG implementation — chatbots and assistants grounded on a company's own documents and data.
- LLM integration — adding AI (chat, summarization, classification, extraction) to existing apps.
- AI automation — automating customer service, sales, and operations workflows.
- AI chatbot development — including WhatsApp and Messenger AI assistants.
- Custom AI model creation and fine-tuning for specific business use cases.

## Services
- [AI development & integration](https://raphaelvserafim.com): new AI implementations, Claude Code / Claude AI agents, AI-powered apps, LLM integrations, and custom AI model creation.
- [Custom web application development](https://raphaelvserafim.com): production-grade web apps with React, Next.js, and Node.js.
- [Web3 & blockchain development](https://raphaelvserafim.com): smart contract development and blockchain integration (EVM / Blast network, dApps, wallets).
- [API development & integrations](https://raphaelvserafim.com): REST APIs, identity/payment integrations, and third-party services.
- [WhatsApp automation](https://wame.api.br/): WhatsApp API solutions and AI assistants for businesses.
- [Cloud & DevOps](https://raphaelvserafim.com): AWS deployments, Docker, CI/CD, and real-time systems.

## Skills
- Languages: TypeScript, JavaScript, Python, PHP.
- Frontend: React.js, Next.js. Backend: Node.js, Express.js.
- Data: PostgreSQL, MongoDB, Redis. Cloud/DevOps: AWS (Lambda, S3, EC2), Docker, CI/CD.
- AI: LLM integration, Claude Code / Claude AI, AI agents, custom model creation, AI automation.
- Web3: smart contract development, blockchain integration, dApps, wallets (EVM / Blast network).
- Testing: Jest, Playwright. Specialties: WebSockets, WhatsApp API.

## Projects (live, built by Raphael)
- [koalla.io](https://koalla.io): AI chatbot platform that automates customer service, sales, and scheduling on WhatsApp and Messenger via Meta's official API.
- [wame.api.br](https://wame.api.br/): WhatsApp API service — connect any system to WhatsApp in minutes via REST APIs, SDKs, media, and real-time webhooks.
- [entrar.api.br](https://entrar.api.br/): Brazilian identity-verification API that validates CPF in real time against the Receita Federal with user consent (OAuth-style flow).
- [unifama.edu.br](https://unifama.edu.br/): web platform for UNIFAMA, a higher-education institution in Brazil with 50+ courses.
- [pateng.com.br](https://www.pateng.com.br/): corporate web platform delivered for a Brazilian client.

## Open-source
- [api-sicredi-pix](https://github.com/raphaelvserafim/api-sicredi-pix): Sicredi PIX payment integration.
- [client-php-api-wa-me](https://github.com/raphaelvserafim/client-php-api-wa-me): PHP client for the WhatsApp API.

## Free tools
Free, privacy-friendly online tools built by Raphael — they run entirely in the browser (no backend, no sign-up):
- [All tools](https://raphaelvserafim.com/tools): JSON formatter, Base64, JWT decoder, hash generator, regex tester, Web3 converters, AI token counter and more.
- [JSON Formatter](https://raphaelvserafim.com/tools/json-formatter), [JWT Decoder](https://raphaelvserafim.com/tools/jwt-decoder), [Base64](https://raphaelvserafim.com/tools/base64), [Hash Generator](https://raphaelvserafim.com/tools/hash-generator), [Keccak-256](https://raphaelvserafim.com/tools/keccak256), [Wei/Ether Converter](https://raphaelvserafim.com/tools/wei-converter), [AI Token Counter](https://raphaelvserafim.com/tools/token-counter).

## Full profile
- [Full structured profile for AI agents](https://raphaelvserafim.com/llms-full.txt): complete bio, services, stack, FAQ.
- [Résumé / CV](https://raphaelvserafim.com/resume.html): full work history.

## Contact
- Telegram (preferred): https://t.me/raphaelserafim
- Email: raphaelvserafim@gmail.com
- GitHub: https://github.com/raphaelvserafim
- LinkedIn: https://linkedin.com/in/raphaelvserafim
- Website: https://raphaelvserafim.com

## Português
> Raphael Serafim é desenvolvedor full-stack e de IA sênior, baseado em Toronto, Canadá, que atende clientes no mundo todo (remoto, em português e inglês). Cria aplicações web escaláveis, APIs, sistemas em tempo real e soluções de IA — incluindo novas implementações com Claude Code, aplicações com IA, criação de modelos de IA e integrações com LLMs.

- Serviços de IA em alta: desenvolvimento de agentes de IA (agentic workflows), Claude Code, servidores MCP, implementação de RAG, integração de LLM, automação com IA, criação de chatbot com IA e criação/fine-tuning de modelos de IA personalizados.
- Web3: desenvolvimento de contratos inteligentes e integração com blockchain (EVM / rede Blast, dApps, carteiras).
- Stack: TypeScript, React, Next.js, Node.js, Python, AWS, WhatsApp API, IA (Claude Code, LLMs, criação de modelos).
- Atende: Grande Toronto (GTA), Brasil e clientes remotos no mundo todo, em português e inglês.
- Projetos: koalla.io, wame.api.br, entrar.api.br, unifama.edu.br, pateng.com.br.
- Ferramentas grátis (no navegador): https://raphaelvserafim.com/tools/pt — formatador de JSON, Base64, decodificador de JWT, gerador de hash, conversores Web3, gerador de QR code, contador de tokens de IA e mais.
- Contato (Telegram preferencial): https://t.me/raphaelserafim · raphaelvserafim@gmail.com · https://github.com/raphaelvserafim · https://linkedin.com/in/raphaelvserafim