Hello, I'm Guillermo 👋

Software Engineer

📍 Bay Area

Mobile engineering lead with 6 years on React Native — deep on offline-first architecture, performance at scale, and iOS release pipelines. Full-stack side projects across GraphQL, Postgres + pgvector, and LLM tooling.

Current Work

Inertia ICD Hub App Icon

Inertia - Construction Collab

Built and scaled an app for construction workers to access and annotate 300MB+ blueprint drawings. Implemented offline-first architecture and optimized load times for large files in bandwidth-constrained environments.

React NativeTypeScriptCSSReduxOffline-firstAWS (S3, RDS, CloudWatch)AWS

Kiku — AI-Powered Bookmark Manager

Save links from any device and ask questions across your library. Full-stack side project: one Expo Router codebase targeting iOS, Android, and web (React Native Web), plus a Chrome extension — all sharing a typed package. GraphQL API with background content extraction, and a streaming RAG pipeline (OpenAI embeddings + pgvector + Claude) with citations.

React NativeExpoTypeScriptGraphQLPostgreSQL + pgvectorDrizzle ORMClaude APIRAG
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