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SinProp/README.md

πŸ‘‹ Hi, I'm Roberto Goyco Jr.

Full-Stack Developer | Software Engineering / Tech Officer | AI-Assisted Development Expert

I'm a Full-Stack Developer at Island Millwork with 4+ years of software engineering experience. From November 2025 through January 2026, I shipped 5 production apps for Island Millwork plus 1 for Volunteers of Americaβ€”exponential productivity visible in my GitHub commit graph. Proficient across 4 major agentic coding suites: Codex, Claude Code, Antigravity, and GitHub Copilot. I build production applications using TypeScript, React, Next.js, Python, and Swiftβ€”integrating with Microsoft Dataverse, Azure, and enterprise APIs while extending Claude Code's capabilities as a platform engineer.


🧰 Languages and Tools

TypeScript

React

Next.js

Python

Swift

Rust

Node.js

Flask

PostgreSQL

MySQL

Azure

AWS

Docker

Git

GitHub

Tailwind CSS

JavaScript

HTML5

CSS3




πŸš€ What I'm Building

Island Millwork Production Applications

πŸ—οΈ Manifest-App - AI-Native Take-Off Estimation (BETA)

  • Next.js 16 + React 19 enterprise SaaS platform for construction blueprint take-off and job costing
  • Integrations: Microsoft Dataverse, Autodesk Platform Services (APS), QuickBooks Online
  • AI-powered estimation assistant using Claude API with RAG (Retrieval-Augmented Generation)
  • 3-legged OAuth for Autodesk APS with secure token management and PDF-to-SVF2 conversion
  • 16 REST API endpoints with type-safe middleware, error handling hierarchies, and request validation

βš™οΈ Value Chain Manifest - Dual-Backend Architecture System (PROD)

  • Next.js 15 with innovative dual-backend system supporting PostgreSQL and Microsoft Dataverse
  • Abstraction layer enabling seamless backend switching without frontend code changes using repository pattern
  • Graph-based workflow visualization using React Flow with custom node/edge components
  • Drizzle ORM for type-safe PostgreSQL queries with automated migrations

πŸ’° Cost Estimator - Job Costing Platform (PROD)

  • React 19 (CRA) + Flask full-stack application with 19,000+ lines of Python backend code
  • LLM-powered Excel import analyzing legacy costing templates and extracting reusable product definitions
  • Reference-based pricing system scaling costs from historical data using surface area calculations
  • Deployed to Azure App Service with MySQL database, SSL connections, automated CI/CD via GitHub Actions

🏭 Island Platform - Production Monorepo (PROD)

  • Monorepo containing two production applications sharing Microsoft Dataverse as primary data source
  • Fab Scheduler: Flask + React (CRA) + MUI production scheduling board with drag-drop kanban, QuickBooks sync
  • SwiftSail: Next.js 14 delivery dispatch app with MapLibre GL mapping, driver assignment, real-time Dataverse sync

Volunteers of America

πŸŽ–οΈ ValorTrack - Veterans Tracking Application (BETA)

  • Flask + SQLAlchemy + Azure web application for veterans tracking
  • Beta testing across 10+ Florida locations automating residency reporting to State and grant-paying entities
  • Digitized PDF forms with Power Apps, SharePoint Lists integration

Personal Projects

πŸŽ™οΈ Sepia-AI - AI Podcast Production Assistant

  • SwiftUI macOS native application for bi-weekly podcast briefing pack generation
  • OpenAI Realtime API for low-latency voice interaction with push-to-talk and live transcription
  • Convex backend for real-time data sync, scheduled jobs, embedding search
  • Perplexity API integration for news aggregation and research

πŸ›οΈ GovPulsePro - Legislative Tracking Platform

  • TanStack React application for government legislative tracking and analysis
  • Convex backend for real-time data synchronization
  • Shadcn/ui component library for responsive UI

🧠 AI-Assisted Development Mastery

Proficient Across 4 Major Agentic Coding Suites

  • πŸ€– OpenAI Codex - Multi-AI orchestration and advanced code generation
  • 🎯 Claude Code - Platform engineering with custom skills, hooks, plugins, and MCP servers
  • 🌐 Google Antigravity IDE - Next-generation development workflows
  • πŸ’» GitHub Copilot - AI pair programming and code completion

Claude Code Platform Engineering

I don't just use Claude Codeβ€”I extend it:

Custom Skills (26)

  • πŸ” Code review and security scanning
  • πŸ—οΈ Architecture planning and system design
  • πŸš€ Deployment automation and CI/CD
  • πŸ“š Documentation generation
  • πŸ§ͺ Test automation and quality assurance
  • πŸ”§ Quick-fix utilities and lint automation

Production Hooks (8)

  • βœ… Real-time security validation (PreToolUse)
  • πŸ›‘οΈ File protection and permission checks (PreToolUse)
  • πŸ“ Command logging and audit trails (PreToolUse)
  • ✨ Auto-formatting on save (PostToolUse)
  • 🌐 Environment validation (SessionStart)
  • πŸ”’ Prompt security checks (UserPromptSubmit)
  • πŸ”” Notification handlers (Notification)
  • 🏁 Completion tracking (Stop)

Premium Plugins (7)

  • Frontend Design, Safety Net, Agent SDK Dev, Plugin Dev, Claude Delegator, Ralph Loop, Swift LSP

MCP Server Integration

  • OpenAI Codex integration for multi-AI orchestration
  • Custom MCP servers for specialized workflows

πŸ› οΈ Tech Stack

Languages:
  TypeScript  β–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–‘  95%
  Python      β–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–‘  95%
  JavaScript  β–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–‘β–‘  90%
  Swift       β–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘β–‘  55%
  Rust        β–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–ˆβ–‘β–‘β–‘β–‘β–‘  80%

Frontend:
  React 18/19           Next.js 14/15/16     Tailwind CSS v4
  Shadcn/ui             React Flow           MapLibre GL
  SwiftUI               MUI

Backend:
  Node.js/Express       Python Flask         SQLAlchemy
  REST APIs             GraphQL

Databases:
  PostgreSQL (Drizzle ORM)    MySQL           SQLite
  MongoDB                      Microsoft Dataverse

Cloud & Enterprise:
  Microsoft Azure              AWS
  β”œβ”€ Dataverse                 β”œβ”€ EC2
  β”œβ”€ Azure AD                  β”œβ”€ RDS
  β”œβ”€ App Service               β”œβ”€ S3
  β”œβ”€ Functions                 └─ Lambda
  └─ SharePoint

AI Development:
  Codex                 Claude Code         Antigravity
  GitHub Copilot        OpenAI API          Perplexity API

Testing & Quality:
  Vitest                Playwright          React Testing Library
  Pytest                Jest                ESLint

DevOps:
  GitHub Actions        Docker              CI/CD Pipelines
  Git                   Bash Scripting

APIs & Integration:
  QuickBooks Online API          Autodesk Platform Services (APS)
  Microsoft Graph API            SharePoint REST API
  OAuth2 / NextAuth / MSAL       Smartsheet API

πŸ“Š GitHub Activity

GitHub Streak


πŸ† Key Achievements

  • 8 Production Applications delivered: 5 for Island Millwork (Nov 2025 - Jan 2026), 1 for VOA, 2 personal projects
  • 4+ Years of Software Engineering Experience at Island Millwork (Dec 2021 - Present)
  • Exponential GitHub Activity visible in commit graph showing rapid productivity acceleration
  • 4 Major Agentic Coding Suites proficiency: Codex, Claude Code, Antigravity, GitHub Copilot
  • 26 Custom Claude Code Skills extending platform capabilities
  • 8 Production Hook Scripts automating security, validation, and workflows
  • 19,000+ Lines of Python in Cost Estimator backend demonstrating depth in backend architecture
  • 10-12 Daily Users on Island Time with 99.5% uptime over 3+ years
  • Dual-Backend Architecture pioneered enabling PostgreSQL/Dataverse abstraction layer
  • Enterprise Integration Expert across Azure (Dataverse, Azure AD, App Service, SharePoint), AWS, and third-party APIs
  • Claude Code Primitives Mastery skills, hooks, plugins, MCP servers, agents, subagent coordination

πŸ’Ό Professional Experience

Island Millwork | Dec 2021 - Present | Ocala, FL

Software Engineering / Tech Officer Role (June 2025 - Present)

  • Building production apps with AI-assisted workflows and enterprise integrations
  • Shipped 5 production applications from Nov 2025 - Jan 2026 using TypeScript, React, Next.js, Python, Swift
  • Proficient across 4 major agentic coding suites: Codex, Claude Code, Antigravity, GitHub Copilot
  • Expert in Microsoft Dataverse, Azure ecosystem, AWS, and enterprise API integration
  • Extended Claude Code platform with 26 custom skills, 8 production hooks, and 7 premium plugins

Earlier Work (Dec 2021 - May 2025)

  • Architected and deployed Island Time labor tracking web application (Flask, React, MySQL, AWS) serving 10-12 employees with 99.5% uptime over 3 years
  • Enhanced production systems with TypeScript migration, security middleware, and 40% query performance improvement
  • Integrated Smartsheet API endpoints for real-time job updates and automated database synchronization
  • Optimized Office 365 tools (SharePoint, Microsoft To-Do) improving cross-team collaboration efficiency by 35%

Volunteers of America | Nov 2023 - Present | Ocala, FL

Volunteer Developer

  • Built ValorTrack: Flask + SQLAlchemy + Azure veterans tracking application
  • Power Apps, SharePoint, Azure integrations for 10+ Florida locations
  • Automated residency reporting to State and grant-paying entities

πŸŽ“ Education

Coding Dojo - Full Stack Web Development Certification | March 2022

  • 32-week intensive bootcamp
  • "Red Belt" certification across 3 full-stack frameworks (MERN, Python, Java)

πŸ“« Connect With Me

LinkedIn GitHub Portfolio Email


πŸ“ˆ Current Focus

  • πŸ”­ Building enterprise applications at Island Millwork with modern web technologies
  • 🌱 Mastering 4 major agentic coding suites: Codex, Claude Code, Antigravity, GitHub Copilot
  • πŸ‘― Deepening Azure integration expertise (Dataverse, Azure AD, App Service, SharePoint)
  • 🀝 Extending Claude Code ecosystem (skills, hooks, plugins, MCP servers, agents)
  • πŸ’¬ Ask me about: AI-assisted development, Claude Code, TypeScript, React, Next.js, Python, Enterprise APIs, Azure
  • πŸ“« How to reach me: sinproper@gmail.com
  • ⚑ Fun fact: Shipped 5 production apps in 3 months (Nov 2025 - Jan 2026) - check my commit graph!

🎯 Interests

  • AI-Assisted Development Workflows
  • Cross-Platform Desktop Applications
  • Enterprise System Integration
  • Modern Full-Stack Architecture
  • Developer Tooling & DX
  • Claude Code Platform Engineering

πŸ’‘ "4+ years of software engineering excellenceβ€”proficient across Codex, Claude Code, Antigravity & GitHub Copilot while shipping production applications."

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Built with ❀️ using Claude Code, TypeScript, and copious amounts of coffee β˜•

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