Hi, I'm Chris, a developer based in the Pacific Northwest. I build websites, Android apps, and custom software tools — with a background that's taken me through IT, manufacturing, and the trades. I enjoy solving problems that mix structure, precision, and real-world practicality.

If something needs to be built, debugged, refactored, or automated cleanly — that's my wheelhouse.

• HTML / CSS / JavaScript
• React
• REST APIs

• Kotlin
• Jetpack Compose
• Android SDK
• MVVM architecture
• Coroutines
• Material 3
• React Native / Expo
• TypeScript

• Python
• FastAPI
• SQLite / FTS5
• OCR workflows (Tesseract / PyMuPDF)
• PDF processing
• Automation & system utilities

• C# / .NET 8
• WinForms
• Git / GitHub

Android app for modeling marine propeller-shaft assemblies with parametric components and real-world machining rules.

Key features:

• Jetpack Compose UI with live dimensioned canvas preview
• Parametric bodies, tapers, liners, threads
• Snap engine, taper calculations, OAL logic
• PDF export and drawing layout engine
• Clean, modular architecture with full unit test coverage

👉 github.com/chrisjmendoza/ShaftSchematic

A local AI software engineering agent that accepts a natural-language task, scans a repository using semantic search, generates a structured plan via LLM, and executes each step through a controlled tool layer.

Key features:

• Multi-LLM support: Anthropic Claude, OpenAI, Ollama, Groq, LM Studio
• File patching, test running, git commits, GitHub PR creation
• Issue watcher daemon — polls GitHub and auto-resolves labeled issues
• Per-repo memory for continuity across sessions
• Dry-run mode, structured task reports, 20+ test files

👉 github.com/chrisjmendoza/Hephaestus

A corkboard-style note canvas app for Android. Pin 6 note types to a large pannable and zoomable canvas across multiple named boards.

Key features:

• Pan/pinch-zoom canvas at 120fps (UI thread, Reanimated 4)
• Sticky notes, index cards, checklists, photos, text bubbles, links
• Note resize, rotation, color themes, snap-to-grid
• Rubber-band multi-select, tack grouping, board templates
• Persistent local storage with schema versioning and migration
• 426 passing tests / 19 suites

👉 github.com/chrisjmendoza/hanna-notes

A Windows backup utility that automatically backs up folders to a USB drive the moment it's plugged in.

Key features:

• Drive identification via sentinel marker file — not fragile drive letters
• WMI USB detection with event storm protection and debounce
• Robocopy-based backup engine with job object process control
• Silent system tray operation with async buffered logging
• Full install/uninstall scripts, scheduled task integration

👉 github.com/chrisjmendoza/portflow

A local-first, AI-powered document management system. Drop in a scanned PDF or image — DocArchivist extracts text via OCR, applies AI-driven metadata, and files everything into a searchable archive.

Key features:

• PDF text extraction with OCR fallback (PyMuPDF + Tesseract)
• AI metadata: title, vendor, date, category, summary
• Multi-provider AI: OpenAI and Anthropic, switchable at runtime
• SQLite FTS5 full-text search across all documents
• React + TypeScript frontend with TanStack Query

• Web development for small businesses — sites, landing pages, contact forms
• Android features, UI builds, and bug fixes (Kotlin + Compose)
• Python tooling, data extraction, OCR pipelines
• FastAPI backends and automation workflows
• Custom desktop utilities and system tools
• Refactoring legacy codebases into maintainable systems

I focus on:

• Clear communication and honest expectations
• Thoughtful, predictable engineering
• Strong debugging and systems thinking
• High-quality code that's built to last
• Fast iteration without cutting corners

• Portfolio: chrismendoza-dev.vercel.app
• Upwork: upwork.com/freelancers/~016923630116835d05
• LinkedIn: linkedin.com/in/chrisjmendoza
• Email: chrisjmendoza@gmail.com

• React Native / Expo deeper architecture
• Production-grade OCR pipelines
• Web development for small business clients

If you're working on Android apps, web projects, automation tools, or engineering-focused software, feel free to reach out. I enjoy building things that make technical work easier, clearer, and more efficient.