Leon Johnson

Stop Paying for Software That Doesn't Fit

Custom AI Builds & Build Coaching, Secured

Generic SaaS was built for everybody and fits nobody. I build the one tool your business actually needs, or teach your team to build it. With 20 years in offensive security, I make sure it doesn't become your next breach.

Book a Free Consultation See How It Works

Two Ways to Work With Me

The cost of custom software just dropped ~90%. That opens the door to building the exact tool your business needs, the one no off-the-shelf vendor will ever make. I either build it for you, or teach your team to build it themselves. Either way, it ships secure.

Done for you

Custom Vertical AI Builds

You know your business better than any software vendor. I turn that knowledge into a tool built around exactly how you actually work, deployed on infrastructure you control, with your data staying yours.

  • Replace expensive SaaS that almost fits with software that does
  • AI-assisted builds in weeks, not months, at a fraction of old custom-dev cost
  • Workflow automation: document processing, reporting, triage, pipelines
  • Security review baked into the build, not bolted on after
For: operators who have the domain knowledge but not the time to build it themselves.
Done with you

AI Build Coaching & Strategy

The moat isn't the code. It's knowing your industry from the inside. If you want to own the build, I'll get you there: where AI actually fits, how to build it with modern AI tooling, and how not to ship a liability doing it.

  • AI strategy: cut the hype, find the workflows worth automating
  • Hands-on coaching to build with AI-assisted development tools
  • Team workshops: prompt engineering, AI-assisted dev, AI security risk
  • Guardrails so a self-built tool doesn't leak your customers' data
For: teams that want to own the capability and build it in-house with expert guidance.
🔒

The part almost nobody else includes: security

Anyone can vibe-code a tool now. Almost nobody building these can also tell you why it won't leak your customer data. After 20 years in offensive security, currently leading privacy red-teaming at TikTok (USDS), that's the part I don't skip. It's the through-line in everything above, especially for legal, accounting, healthcare, and other privacy-critical work.


How It Works

Every engagement follows a straightforward process. We find what's slowing you down, figure out where AI fits, build it, and get it running on your terms.

01
🔍

Identify

We find the workflows costing you the most time, money, or frustration. The ones where generic software falls short.

02
🗺

Map

I document your current process step by step and pinpoint exactly where AI can make the biggest impact.

03
🛠

Build

I build your custom app using AI-assisted development. Fast, iterative, and built to your exact spec.

04
🚀

Deploy

Your app runs on infrastructure you control: cloud, private server, or your own hardware. Your data stays yours.


The Kind of Work This Solves

Everyday problems generic software was never designed to handle. The kind that show up in legal, accounting, healthcare, and other industries where the data is sensitive and the workflow is specific.

📈

Custom Reporting

Dashboards and reports tailored to your data, pulling from the exact sources you use, formatted the way you need.

📧

Email & Inbox Automation

AI agents that screen, sort, and pre-draft responses to your email based on your rules and communication style.

📄

Document Processing

Turn receipts, invoices, contracts, and forms into structured data. Works across formats, languages, and regulatory requirements.

🔒

Security Tooling

AI-powered vulnerability scanning, threat analysis, and automated security workflows built for your specific environment.

📅

Scheduling & Coordination

Smart assistants that manage calendars, coordinate across time zones, and tell you what to focus on each day.

💡

Your Idea Here

Have a workflow that frustrates you? A process you've been procrastinating on? Something you can't do without the right tool? Let's talk.


Why Me

2024 – Present
AI Consulting, Independent
Independent

Building custom AI apps, workflow automations, and strategy consulting for businesses adopting AI. Shipped dozens of hyperspecific tools for clients and personal use.

2024 – Present
Privacy Red Team Lead
TikTok (USDS)

Leading offensive privacy testing and vulnerability research. Deep experience with AI/ML platform security from the inside.

2023 – 2024
AI Security Researcher
RunSybil

Researched AI security threats and developed automated security testing methodologies for AI/ML systems.


Tools I've Built

gitwho
GitHub profile intelligence tool. Analyzes contributions, tech stack, and activity patterns to build a developer profile. Try it live →
Voice
Local speech-to-text for macOS. whisper.cpp + Ollama/OpenAI/Anthropic for AI text cleanup.
cloudlamma
One-command local LLM deployment via Ollama + Cloudflare tunnels. Zero to internet-accessible LLM.
oclient
CLI client for Ollama's local LLM API. Lightweight Python tool for interacting with local models.
gpt_tools
AI-assisted pen testing and red team tools. Security tooling built with ChatGPT.
claude_hunter
Scans GitHub repos to find where Claude AI has contributed code.
jwtmap
JWT vulnerability mapper using OpenAI API for analysis.

Media & Talks

2025
Xygeni SafeDev Talk
AI-generated podcast

Let's Build Something That Actually Fits

Want me to build it for you, or coach your team to build it themselves? Either way it ships secure. First call is free. No jargon, no sales pitch, just whether this is a fit.