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.
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🚀 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)
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🛠️ 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
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🎓 Former University Lecturer (UFPR) with 3.5+ years teaching engineering.
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🌍 Remote experience with distributed teams in the US, UK, and Europe.
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✍️ Content creator → YouTube, LinkedIn (7k+ followers), Substack (AI Engineering & SaaS).
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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