I'm a senior iOS engineer, and I've spent many years building and shipping production mobile apps. I work mainly in Swift and SwiftUI, and most of my attention goes to the parts that decide whether an app holds up over time: architecture, concurrency, performance, and how the pieces of the system fit together.
These days I also write code with AI tools like Cursor, Claude, and Codex. They help me move faster, but I still review every change and own the architecture, so the speed doesn't cost me maintainability or correctness on the platform. I especially enjoy writing Python this way. I use it to build developer tools, and I write up how each one works.
I've shipped enough real software to recognize the patterns that cause trouble later, and I keep learning as Apple's frameworks and AI-assisted workflows change. I enjoy mentoring and working through hard technical problems, and I like helping teams ship software they can rely on.
Site and case studies: rodneydegracia.com
Current development status: rodneydegracia.com/status-board
- LoreBuilder CLI: A persistent world you can talk to, built as a Python CLI with RAG, Chroma, and SQLite sessions.
- Bugmiester: A localhost trainer for spotting Swift bugs, built with Python, FastAPI, and free-text scoring.
- Monitor: A personal AI coding agent CLI, a Python REPL with tools and task planning.
- ultra-trace: Deterministic Swift static analysis that keeps assist and gate as separate steps.
- Desktopper: Turns an ordinary-language request into a local schema-driven app with Python, SQLite, and Safari.
- Maximus: An LLM harness for contest machine learning, with a person approving each training run.
- Greenfield: A spec-first harness for building a new app one verified unit at a time.
- super-duper: A planning and execution CLI that turns a goal into a hierarchical plan and validated workspace artifacts.
- llm-platform: An LLM tool-calling runtime with a plugin host that works across model providers.
- World-Sim: A local narrative simulation with split storage, grounded play modes, and a companion World Builder.


