Olá — Portfolio 2026 · Open to work

I build AI products end‑to‑end.

I like boring-in-production systems, honest trade-offs, and the occasional 4am debugging win.

Walber Fellipe

6+ years shipping full-stack systems — ML pipelines, agentic infrastructure, and the APIs and interfaces around them.

ROLE
Full-stack engineer · AI focused
BASED
Remote · Brazil
NOW
Deepening applied AI through coursework

About

Strategy and execution — reliable software, and teams that grow around it.

I bridge strategy and execution — shipping reliable software while helping teams grow. I care about clear architecture, measurable outcomes, and honest trade-offs when complexity shows up.

Full-stack engineer with 6+ years shipping products end-to-end — currently leading engineering at Diagonal, with a strong focus on AI-assisted products and platform architecture, from discovery through production metrics.

Recent work spans marketplaces and portals (Cibus, Chevrolet Seminovos), GIS-heavy public-sector platforms (Regulariza.ai), mobile and web at scale (Strings Brasil), and automation around data pipelines and Slack reporting.

Experience & impact

15k+concurrent users supported through infra & optimization work (Strings Brasil).
20k+users impacted through platform work at Cibus.
AILLM integrations, agentic workflows, RAG, evaluation & guardrails — deepening applied AI through formal coursework.

How I work

TypeScript-first backends (Node, NestJS, Express), React and Next.js on the frontend, Postgres and pragmatic ORMs, AWS building blocks (S3, Cognito), queues when workloads need it, and observability so production stays boring — in a good way.