Latest blogThe time I found a v0 API billing bug

Joe Simo

Designer/developer, FL.

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

Work

GitHub projects

11 public and private repositories, shown without private implementation details.

joesimo

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

public repo / TypeScript / Next.js

skills

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

public repo / agent skills / Vercel Geist

love-presentation

Public TypeScript project for lightweight private slideshow links.

public repo / TypeScript / Next.js

sim0

Private TypeScript product repository for the browser workspace at sim0.com.

private repo / TypeScript / productPrivate

astro

Private Swift repository for the Astrosimo stargazing app and planning screens.

private repo / Swift / iOSPrivate

chesslm

Private TypeScript repository for the ChessLM chess training product.

private repo / TypeScript / training productPrivate

garden0

Private C# repository for the garden0 Unity iOS game and landing page.

private repo / C# / UnityPrivate

website

Private TypeScript repository for earlier website work and portfolio iteration.

private repo / TypeScript / websitePrivate

platforms-starter-kit

Private TypeScript repository for a starter-kit experiment and deployment surface.

private repo / TypeScript / starter kitPrivate

joe-simo-pet

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

public repo / MIT

openai-agents-js

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

public repo / agent workflow

Systems

Systems that keep moving.

Support, recovery, infrastructure, and operational work across production environments.

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

System Administrator

Macromedica Dominicana

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

Disaster Recovery Engineer

Never Off Technology

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

IT Systems Administrator

Brox Industries

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

Certifications

27 credentials

Next.js Pages Router Fundamentals

Next.js App Router Fundamentals

Next.js SEO Fundamentals

React Foundations for Next.js

PPC Fundamentals Exam

Content Marketing Fundamentals Exam

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+

CompTIA Network+

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

Joe Simo with ThePrimeagen at React Miami 2026

Joe Simo with a React Miami attendee at La Tropical

Joe Simo with a React Miami attendee in Miami

Joe Simo with a React Miami attendee after hours

Joe Simo with a React Miami attendee near the expo floor

Joe Simo with a React Miami attendee inside the conference room

Joe Simo with a React Miami attendee holding a sticker

Joe Simo with a React Miami attendee in a hallway

Joe Simo with a React Miami attendee at the event backdrop

Joe Simo with React Miami attendees in the audience

React Miami attendees seated in the conference room

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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