01KM 2020 · THE BLOCK
It all started in a garage.
Technical degree in Systems Development at ETEC (2020–2022). First code, first logic — and the urge to build things that actually work.
Click the screens and signs to open the cases.
Km 0 · São Paulo
Guilherme Yuji
Data Engineering · Data Analytics · BI · Automation
I build systems that validate, monitor and automate data at scale — and ship custom software for small businesses. This is the road so far.
02KM 2022 · FREELANCE
Fifteen storefronts, fifteen systems.
Since 2022, as an independent developer, I deliver custom systems end to end for auto repair shops, optical stores and service companies — from requirements to deployment and support.
I want a system like this03KM 2025 · CELLERE
Big Data on the Vivo project.
Data Analyst at Cellere Soluções em TIC (May–Dec 2025), assigned to the Vivo project — across four workstreams.
04KM 2026 · ENGINEERING BRASIL
Same project, new home.
In 2026 I stayed on the Vivo project, now as a Junior Data Analyst at Engineering Brasil — on the Data Curation workstream. Below, the key deliverables.
05KM 2026 · AI AGENTS
Cars that drive themselves.
Still at Engineering Brasil, I lead the AI agents initiative for Vivo: Python, LangGraph and multi-agent architectures to automate business workflows — in its early stage.
06TOLL PLAZA · CERTIFICATIONS
Every certificate, a gate that opens.
CS50x (Harvard), Data Engineering Foundations (Astronomer) and four data & AI courses at Alura. Alongside the degrees: ETEC, FATEC and Mackenzie.
Lookout
Next stop: your project.
A data & AI role, or a custom system for your business. Let's talk.
© 2026 Guilherme Yuji · São Paulo