pten
Available for projects & opportunities

Turning ideas into
AI-POWEREDDIGITALPRODUCTS
— from prototype to production.

Software and product engineer focused on applied AI, systems architecture and high-impact solutions. From concept to deploy — with strategic vision and technical polish.

What I do

From idea to shipped product

Take an idea — sometimes just a sentence — and turn it into a real, working, one-of-a-kind product. From vision to architecture, from the first sketch to a production deploy.

I don't ship code — I ship solutions with product vision and architecture built to scale. Designed and built Zoan from scratch: an autonomous AI agent operating on Mercado Livre today in production. That's the kind of result on the table.

Idea
Strategy
Engineering
Product

AI products

Apps and agents powered by generative AI: automated financial auditing, intelligent classification, decision automation and autonomous flows wired to frontier models (Gemini, GPT, Claude).

Automation & integrations

Connecting APIs, marketplaces and systems to remove manual work — operational management, data pipelines, ERP integrations and platforms that run on their own, without human intervention.

Software engineering

Performant frontend, scalable backend and well-modeled data. B2B platforms, operational control dashboards, internal systems — clean, secure, refined architecture built to evolve.

01

Idea & vision

Getting to the real problem and designing the solution with product vision: what matters, what scales, what creates value.

02

Architecture & build

Building using AI as an engineering lever: clean, secure architecture in record time, without trading away quality.

03

Shipped & live

Deploy, monitoring and continuous evolution. Something that truly works in the user's hands — not a prototype.

14+

years immersed in tech

2

real products in production

100%

from prototype to deploy

Got an idea in mind?

Tell me what you need. I reply fast and the first conversation is no strings attached.

Chat on WhatsApp
Selected work

Projects

Products I designed and built — from concept to production code.

In production★ Featured
2025 —

Zoan

Autonomous AI agent for Mercado Livre sellers

A multi-tenant SaaS that behaves like an autonomous agent. From a single photo and a short description, the AI writes an optimized title, professional copy and 5 studio photos — and publishes the listing on its own. It also answers buyer questions, monitors orders in real time and centralizes everything in a mobile panel. From idea to a product in production.

  • Publishes listings with AI: title, copy and studio photos
  • Answers questions and monitors orders autonomously
  • Multi-tenant, credits + subscription (Stripe), live in production
zoan.com.br
NestJSNext.jsTypeScriptGeminiOpenAIPostgreSQLRedisDocker
Read the caseView live
In production
2024

Imu Email Classifier

Smart real-time email classification

Bulk email classifier powered by generative AI that prioritizes critical messages in real time, cutting noise and speeding up response.

ReactPythonFlaskGeminiTailwind CSS
View live
Live
2026

Portfólio

This portfolio — shaders and motion

Portfolio with an iridescent GLSL shader hero, smooth scroll and micro-interactions. Bilingual, performant and production-ready.

Next.jsReact Three FiberGLSLFramer Motion
Code

Want to build something at this level?

About me

AI as a lever, product as an obsession

Into tech since age 6 — what started as curiosity became an obsession with product and engineering.

IA

AI as a real tool

I don't use AI as decoration — I use it as an engineering lever. I wield AI models and tools so effectively that I build products in record time, with clean, secure, efficient and refined architecture, and high added value. It's the difference between 'using AI' and building with AI.

Since the age of 6, I've been taking things apart, testing and building on the computer. That curiosity never stopped: it became study, it became practice, and today it's how I create.

I'm 20 and studying Computer Science at Uniritter. I work end-to-end as a software and product engineer — frontend, backend and data — focused on architecture and shipping something that truly works.

The desire to know is the driving force behind all science.

Since

age 6

Focus

Applied AI + Product

Base

Full Stack

Studies

Computer Science

Stack

The tools I use to turn an idea into a product with professional polish.

TypeScriptReactNext.jsNode.jsPythonTailwind CSSPostgreSQLDockerOpenAIClaudeThree.jsGit

What's next

Going deeper into context engineering and AI-focused software architecture — and open to opportunities and partnerships to build increasingly intelligent, high-impact products.

Contact

Let's build something together

For projects, partnerships or opportunities. Pick the channel you prefer — I reply fast.

Direct channels

WhatsAppWhatsAppEmailcontato.rosiak@gmail.comGitHub@johnrosikLinkedIn/joaorosiak