Joey Diaz
Director of Operations · Mac Daddy Sales & Service · Tampa Bay, FL
Founder · Foundation Operations LLC
I design and deploy production business systems using AI-assisted development, integrating payments, communications, data, and automation into unified platforms. Every system below is live, handling real transactions, real customers, and real infrastructure — built and operated by a single developer.
"Can one developer replace an engineering team?" — This portfolio is the answer. Five self-hosted production systems, zero SaaS dependencies, all built with AI-augmented workflows.
My Role
System architecture & design
AI-assisted development & iteration
Third-party integration (Stripe, Twilio, etc.)
Deployment, hosting & ops management
Database design & migration
Testing, monitoring & incident response
How I Build Systems
1
Define Business Workflow
2
AI-Accelerated Development
3
Validate Through Real Usage
4
Integrate Into One Platform
5
Deploy & Monitor Production
AI is a core part of my workflow — not a shortcut. I use Claude, GPT-4, and local LLMs to accelerate architecture decisions, generate boilerplate, validate code, and automate reviews. The output is production software that handles real money and real customers.
01 · Anchor Case Study
Mac Daddy Portal
Full Business Operating System · ERP · CRM · Payments
Used in daily operations at Mac Daddy Sales & Service, Land O' Lakes, FL · Handles real transactions and customer data · Self-hosted on dedicated VPS
A complete business management platform that replaced 5-6 separate SaaS products with one self-hosted system. Manages the entire repair lifecycle: customer intake → equipment registration → work orders → inspection → invoicing → payment → warranty claims → follow-up.
Before
Separate tools for CRM, invoicing, scheduling
Manual warranty claim submission
Paper-based equipment tracking
No centralized communications
$500+/mo in combined SaaS costs
After
Single platform — all business data in one place
Kanban warranty pipeline with auto-validation
Digital equipment records with serial tracking
Unified SMS, voice, email, and team chat
$0/mo platform cost — fully self-hosted
Outcome: Invoicing reduced from 20+ minutes to under 2 minutes per job. Warranty claims pipeline directly drives shop revenue — Joey is compensated on percentage of approved claims. 327 customer records, 384 work orders, and 65 warranty claims managed through the platform.
React 18Express.jsPostgreSQL 16Socket.IOTailwind v4StripeTwilioGoogle Drive APIZoom Phone
💳
Live Stripe Payments
Webhook listeners, payment audit log, invoice generation — real money, every transaction.
📞
Unified Communications
Twilio SMS/Voice, Zoom Phone, SMTP/IMAP email, Socket.IO team chat — one hub.
📊
Double-Entry Accounting
Chart of accounts, journal entries, expenses, vendors, tax reports.
🔧
EGO Warranty Pipeline
Brand-specific serial validation, kanban workflow, model doc library.
🔒
PII-Scrubbed Staging
Automated clone-prod-to-stage with full anonymization for safe testing.
👥
Customer Portal
Standalone customer-facing app — status checks, invoices, messaging.
02 · Architecture Evolution
Foundation Portal v3
Next-Gen Monorepo · Widget Workspace · Multi-Tenant
Deployed on self-hosted Docker infrastructure · 18 Supabase containers running in production
Ground-up rebuild of Mac Daddy Portal as a modern Turborepo monorepo with type-safe APIs, drag-and-drop widget workspace, and Supabase-powered auth. Designed as a multi-tenant platform — Mac Daddy is tenant #1.
Outcome: Migrating a 29K-line single-file React app to a type-safe monorepo — without disrupting daily operations. Multi-tenant widget architecture means the next service business deploys with configuration, not new code.
React 19tRPC 11Drizzle ORMSupabaseTurborepoViteShadcn/uiDocker
🏗️
Turborepo Monorepo
apps/web + apps/api + packages/db + packages/shared — fully typed across boundaries.
⚡
tRPC End-to-End Types
21 routers with Zod validation — zero runtime type errors between frontend and backend.
🧩
Drag-and-Drop Workspace
React-Grid-Layout with persistent per-user widget layouts.
🐳
Docker Stack
portal-web + portal-api + full Supabase (12 containers) on VPS.
03 · AI Innovation
Iron Sharpened Fitness
Self-Modifying PWA · Autonomous Code Pipeline · Community App
Live at isf2717.com · Handles real users · AI pipeline has shipped code with zero production incidents
A modular faith-based fitness PWA (Proverbs 27:17) with a 1,041-line autonomous code modification engine. The app writes, reviews, and deploys its own code changes through dual-LLM consensus with 11 safety guardrails.
Outcome: Production AI pipeline ships code autonomously with zero incidents. Dual-LLM review (local Ollama + cloud GPT-4o-mini) eliminates first-pass API costs while maintaining independent validation before any code touches production.
React 18Vite 6Express.jsPostgreSQLOllamaTailscaleGPT-4o-mini
11 Safety Guardrails
G1Syntax validation before commit
G2New dependency scanning
G5File scope allowlist (locked core)
G64,000 line diff cap
G7400 line deletion limit
G9Circuit breaker (2 errors = halt)
G11aLocal Ollama code review (free)
G11bCloud GPT-4o-mini validation
04 · DevOps Infrastructure
FOMCP Server
MCP Control Plane · Chat-to-Deploy · AI DevOps
Live at mcp.foundationoperations.com · 100% success rate across all production calls · Deployed on self-hosted infrastructure
A custom Model Context Protocol server that gives an LLM direct read/write/execute access to deploy code, query databases, manage DNS, and monitor uptime — turning AI into an autonomous DevOps engineer with human-in-the-loop approval.
Outcome: Replaced 100% of manual SSH server management. A deployment that previously required 5 terminal commands now takes one sentence. 66 production calls, zero errors — database queries, code deployments, DNS changes, and service restarts all from a chat window.
Node.jsPM2PostgreSQLDockerUptime KumaCloudflare DNSn8nOllama
49 Tools Across 8 Domains
Codebase Intelligence7
Database Operations7
Uptime Monitoring6
Deployment Pipeline5
Filesystem + GitHub10
DNS + n8n + Infra + AI Review14
05 · Rapid Prototyping
DiazOps
Personal Operations Center · 31 Standalone Tools
Deployed at diazops.foundationoperations.com · Used daily for personal operations
A personal productivity lab — 31 standalone apps built for tactical planning, fitness tracking, shift management, and daily protocol execution. Demonstrates the ability to identify a need, build a solution, and ship it same-day.
Outcome: 31 tools built in vanilla HTML/JS — no npm install, no build step, no framework lock-in. Average time from idea to deployed tool: under 2 hours. Replaced Google Sheets, Apple Notes, and 4 separate tracking apps with purpose-built interfaces.
Vanilla HTML/CSS/JSFirebaseChart.jsOpen-Meteo APIGoogle Auth
Featured Tools
Daily Protocol
Fasting, supplements, debrief
Training Tracker
14-day PPL with logging
Shift Command Center
14-day rotation + ICS export
Warrior Dining Guide
60+ restaurants, filters
Finance Dashboard
Chart.js KPIs + budgets
Fitness Tracker
Firebase cloud-synced