AI Engineer | Fullstack Developer | Product-Oriented Builder

I’m a Senior Software Engineer with a Ph.D. in Engineering, specializing in fullstack web development and AI-powered applications.
I design, build, and scale production-grade applications end-to-end — from backend systems and APIs to intuitive UIs and intelligent AI features.

• 🚀 Current Work

  • AI Engineer @ Vera (NYC-based startup automating accounting workflows with AI agents)
  • Freelance @ fischerafael (LLM-powered SaaS for US/EU startups & SMBs)
  • Author of AI Engineering in Practice (Manning Publications, 2025)

• 🛠️ Core Stack

  • Frontend → React, Next.js, TypeScript, TailwindCSS, shadcn/ui
  • Backend → Node.js, Python, Django
  • Databases → PostgreSQL, MongoDB, Firebase
  • AI/ML → OpenAI, LangChain, Pydantic AI, vector databases, RAG, AI Agents
  • DevOps → Azure, Vercel, Docker, CI/CD, TDD

• 🎓 Former University Lecturer (UFPR) with 3.5+ years teaching engineering.

• 🌍 Remote experience with distributed teams in the US, UK, and Europe.

• ✍️ Content creator → YouTube, LinkedIn (7k+ followers), Substack (AI Engineering & SaaS).

• AI Agents for Accounting Automation (Vera)
  Reduced accountant onboarding time from months → hours by building secure, scalable, AI-native workflows.

• Custom AI Workflows for SMBs (Freelance)
  Designed Next.js + Python apps with agentic features, automating repetitive back-office tasks.

• AI Engineering in Practice (Manning, 2025)
  Co-authoring a hands-on developer guide to AI Engineering & Prompt Engineering, with real-world examples.

• Open-Source UX Arch
  Platform from my PhD research → AI predicting architectural experiences, powered by Brain.js + TypeScript.

⭐️ From rafaelsanfischer