Software Engineer
Building production systems for global teams, from Brazil, for anywhere.
I have 5+ years shipping and operating software that businesses depend on, three of them at AB InBev (BEES), a global B2B commerce platform, where I worked across CMS and micro-frontend architecture, API integration, automated testing, on-call and production incident response. Promoted twice in three years and recognized for merit in 2024 and 2025.
Today I split my time between Lean Owl Software, open-source work on the Qaul decentralized P2P platform, and my own consulting practice.
🔌 Integrations & automation — connecting CRMs, ERPs, legacy systems and third-party APIs; replacing manual processes with reliable automated workflows (n8n, webhooks, scheduled jobs).
🤖 Applied AI — LLM APIs, retrieval-augmented workflows, embeddings and vector search, agent/tool pipelines. Practical implementations, not demos.
⚙️ Backend & APIs — Node.js, Express, NestJS, REST APIs, PostgreSQL and relational data modeling, containerized with Docker.
🖥️ Web & cross-platform apps — React, TypeScript, React Native and Flutter; design systems and reusable component libraries.
🛡️ Quality & reliability — end-to-end test strategy (Playwright, Jest, Selenium), tracing, metrics, monitoring and root-cause analysis.
🧩 Legacy modernization — incremental migrations that keep the business running while the architecture improves.
🎓 BSc in Computer Science — Federal University of São João del-Rei (UFSJ)
🔬 Undergraduate ML researcher on NELL (Never-Ending Language Learning): knowledge extraction and data-quality evaluation at web scale
🌍 Experience with distributed international teams (Brazil, Spain, global open source)
🗣️ Portuguese (native) · English (C2)
Languages
Backend & data
Front-end & cross-platform
Infra, quality & tooling
Data science & design
Have a system that needs building, integrating, or rescuing? I take on contract and full-time work, remote worldwide.
📬 contact@gustavodcs.com · LinkedIn
💬 Happy to talk about any technology, I'm not tied to a single language or framework.