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Joe Simo
Latest blogThe time I found a v0 API billing bug

Joe Simo

Designer/developer, FL.

React / Next.js / TypeScript / JavaScript / Tailwind CSS / shadcn/ui / Three.js / Motion

Work

GitHub projects

joesimo

Public TypeScript repository for joesimo.com and the current portfolio surface.

public repo / TypeScript / Next.jsopens in a new tab

skills

Community agent skills by Joe Simo, including the Vercel Geist design-system skill.

public repo / agent skills / Vercel Geistopens in a new tab

love-presentation

Public TypeScript project for lightweight private slideshow links.

public repo / TypeScript / Next.jsopens in a new tab

joe-simo-pet

Public MIT package for Joe Simo's Codex pet assets and package metadata.

public repo / MITopens in a new tab

openai-agents-js

Public GitHub fork described as a lightweight framework for multi-agent workflows and voice agents.

public repo / agent workflowopens in a new tab

Live products

Official product links

sim0

A browser workspace for previewing, editing, and reviewing an app.

sim0.comopens in a new tab

signature0

A focused utility for preparing signature-copying workflows that survive real email paste behavior.

signature0.comopens in a new tab

ChessLM

A chess training product with a Next.js web/backend app and a Unity client for browser, iPhone, and iPad.

chesslm.comopens in a new tab

Astrosimo

An iOS stargazing app with night planning, verified capture, and live sky guidance screens.

astrosimo.comopens in a new tab

Systems

Systems that keep moving.

Databases, Windows Server, VPN, backups, virtualization, endpoint security, and restores.

01

System Administrator

Macromedica Dominicana

Managed databases, Windows server infrastructure, directory services, telephony, VPN access, virtualization, cabling, and core office infrastructure.
02

Disaster Recovery Engineer

Never Off Technology

Installed, supported, and troubleshot disaster recovery, high availability, business continuity, virtualization, backup appliances, restores, and security workflows.
03

IT Systems Administrator

Brox Industries

Owned daily infrastructure checks, server health, network access, backups, endpoint security, scheduled updates, snapshots, and manufacturing systems support.

Certifications

Certifications

Next.js Pages Router Fundamentals

Next.js App Router Fundamentals

Next.js SEO Fundamentals

React Foundations for Next.js

PPC Fundamentals Exam badge

PPC Fundamentals Exam

Content Marketing Fundamentals Exam badge

Content Marketing Fundamentals Exam

Technical SEO Exam badge

Technical SEO Exam

Local SEO Exam

Mobile SEO Exam

Backlink Management Exam

Keyword Research Exam

SEO Fundamentals Exam

Content Marketing and SEO Fundamentals Exam

Role of Content Exam

MTA: Networking Fundamentals certified 2018 badge

Microsoft Technology Associate: Networking Fundamentals

CompTIA A+ certification badge

CompTIA A+

CompTIA Network+ CE certification badge

CompTIA Network+

Unitrends Certified Associate badge

Unitrends Certified Associate (UCA)

Datto Technical Specialist I

Datto Technical Specialist II

Barracuda SignNow

Barracuda Web Security Service Certified Engineer

Barracuda Email Security Service Certified Engineer

Part 107 Small Unmanned Aircraft Systems Initial

Part 107 Small Unmanned Aircraft Systems Recurrent

Commercial Drone Pilot: CFR Part 107 Explained

Cert Prep: FAA Part 107 Commercial Drone License

Use the arrow keys to browse the React Miami photo rail.

Blog

Blog

Short notes and writing.

Responsible disclosure

The time I found a v0 API billing bug

A private report about successful v0 API calls missing from billing, the evidence I sent to Guillermo Rauch, and the v0 engineer who confirmed the fix.

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