Looking for a job

João Batista Ferreira

@joobatistaferreira

Message

I build production AI-agent, RAG, and full-stack web platforms.

Brazil

Message

What I'm looking for

I'm looking to build production AI/LLM and RAG-powered web products, contributing across frontend and backend architecture while mentoring distributed teams and maintaining strong engineering standards.

I've spent 18+ years shipping product-driven web platforms used by millions, recently focusing on production AI/LLM products, RAG, and agentic systems.

At Dappier, I built and owned the frontend for an AI-agent platform, contributed to its Go API, hardened an embeddable AI-agent widget for third-party sites, and integrated OpenAI into product workflows. I also helped define API contracts for usage tracking and billing.

I've delivered LLM- and RAG-based applications for startups including Pump and Arancia, working across React, TypeScript, Node.js, Go, MongoDB, and AWS. At GoDaddy, I contributed generative-AI assistance to the merchant editing flow for a website builder and e-commerce platform used by millions.

I've led frontend development at Ender, mentored globally distributed teams, and set technical standards through architecture and code-quality reviews. My background spans React and frontend architecture as well as full-stack delivery with Node.js, Go, Java, and Ruby on Rails.

Experience

Work history, roles, and key accomplishments

Current

Freelance Full Stack Engineer / AI Consultant

Current

Self Employed

Sep 2025 - Present (1 year)

Design and build AI-powered web applications and LLM-based solutions for startups, from architecture through production. Shipped LLM- and RAG-backed features for clients including Pump and Arancia.