const douglas = {
pronouns: "He/Him",
location: "Rio de Janeiro, Brazil 🇧🇷",
role: "Full Stack Developer @ Intelie",
alsoAnswersTo: "Vibe Coder Fixer",
writingCodeSince: 2019,
domain: "Real-time telemetry for Oil & Gas",
stack: {
backend: ["Java", "Kotlin", "Spring Boot", "REST APIs"],
frontend: ["TypeScript", "React", "Next.js", "PWA"],
data: ["PostgreSQL", "MongoDB", "event streaming"],
ai: ["RAG", "MCP servers", "agentic workflows"],
},
education: "BSc in Software Engineering, 2024",
passions: ["Algorithms", "Clean Code", "UX/UI", "Open Source"],
funFact: "I turn coffee ☕ into code",
}; |
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Since 2020 I've been at Intelie, on the Performance KPIs team for Oil & Gas operations — sensor data coming off drilling rigs that has to be correct and fast on the screen of the person running the operation.
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Sensor streams turned into operational KPIs, and rig-state classification engines that run live and over historical reprocessing — same rules, both paths.
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REST APIs with role-based authorization and per-rig configuration, message-broker microservices, and analytics pipelines feeding BI dashboards.
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An E2E suite built from scratch (timezone and midnight-rollover edge cases), plus real production saves: an out-of-memory fix in a high-volume export pipeline and incident root-cause analysis.
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My team's RAG knowledge base behind an MCP server that AI agents query, an AI patterns catalog, and AI-generated release notes wired into CI/CD.
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How I take features: end to end — refinement with domain experts → API design → implementation → tests → docs. Named decision-maker on team ADRs and a recurring reviewer for my teammates' code.
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Free and open mathematics platform — from early childhood to research level — fully bilingual (pt-BR / en-US), with interactive exercises, diagnostic feedback and progress kept on your own device. No account, no backend. Content-first, spec- and ADR-driven, published on every merge.
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Book lending system on the Google Sheets API, with a full unit-test suite and coverage reporting.
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Bilingual portfolio and technical blog — content authored in MDX, statically rendered.
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Lightweight web player that streams radio stations from Rio de Janeiro, right in the browser.
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Grab full-size images and thumbnails straight from social media links.
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Manage stock over Telegram: LLMs read products from photos and voice notes and sync them to Google Sheets.
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Offline-first PWA that puts spaced repetition on your real calendar. Built with an agentic, ticket-based workflow.
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Multi-tenant platform derived from LAMAR: any client spins up their own Telegram inventory bot plus a full web panel.
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Even solo, these ship with the same rigor: living specs & ADRs, C4 architecture, ticket-driven delivery and automated CI/CD with security scanning.
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🎨 Frontend
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⚙️ Backend & Infra
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🧪 Testing & Quality
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🤖 AI & ML
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🧰 Tools |
☁️ Exploring Courses, labs and services I develop for — not production ops. |
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