Senior Developer Relations Engineer at Google based in London 🇬🇧 (originally from Brazil 🇧🇷). Former double Google Developer Expert (GDE) in Go & GCP, with 20+ years of distributed backend and data architecture experience.

I build developer tools, advocate for "disciplined vibe coding" (pairing AI coding agents with compiler rigor and automated verification), and write technical deep dives at danicat.dev.

• 🩺 danicat/godoctor: CLI & MCP server for automated Go architectural diagnostics, style enforcement, and AST-aware refactoring.
• 🧬 danicat/selene: High-performance mutation testing engine for Go to verify test suite efficacy and catch surviving mutants.
• 🔍 danicat/testquery: SQL analytics engine over Go test executions, coverage reports, and benchmark metrics.
• 🕹️ danicat/pacgo: Learn Go by building a complete terminal-based Pac-Man clone from scratch.

• ⚡ danicat/speedgrapher: CLI and MCP server for editorial linting, readability scoring (Fog index), AI slop detection, and SEO diagnostics.
• 🧠 danicat/skills: Open-source specialized Agent Skills for AI coding assistants (catalog at skills.danicat.dev).

• 📈 danicat/read.dbc: R package to extract and decompress DATASUS health databases.

• 🐹 Go Systems Programming: Modern CLI tooling, clean flat architecture, concurrency, and mutation testing.
• 🤖 Autonomous AI Agents: Multi-agent swarms, Model Context Protocol (MCP), Genkit, and the Gemini API.
• 🎮 Retro Game Development: 2D game loops, procedural art, and chiptune audio in Go (Ebitengine).
• 🐈 Cozy Web & Writing: Independent technical blogging, long-form engineering essays, and cozy developer experiences.

I regularly deliver keynotes and hands-on workshops at international conferences like GopherCon, TEDx, and Google Cloud Next.

• 📅 Past & Upcoming Talks (Slides & Recordings)
• 🎙️ Sessionize Speaker Profile (CFP abstracts and speaker kit)

• 🌐 Website & Blog: danicat.dev
• 💼 LinkedIn: /in/petruzalek
• 🦋 Bluesky: @danicat83.bsky.social
• 🐦 X / Twitter: @danicat83
• ✉️ Email: daniela@danicat.dev