Kevin Champlin · Senior Software Engineer
I build custom software, mobile apps, and AI systems that ship.
Fortune 100 and Fortune 500 work through Champlin Enterprises. Local businesses because community matters. 20+ years shipping production systems—end-to-end, no junior handoffs, no offshore layers.
- What I build Web apps · iOS & Android · AI integrations
- Stack TypeScript · Swift · Kotlin · PHP · .NET · Python
Latest article
Apr 21, 2026
Improving Delivery Speed with Private AI Tools
Enhance your business processes by accelerating delivery speed using private AI tools.
Generative Identity Engine
New: CTA Builder — multi-product, multi-spokesperson ads in one click.
Business owners plug in their workspace narrative, hero products, and teammates once—then let CTA Builder craft campaign-ready stills with auto-generated copy. Surface the right people, the right SKUs, and the right CTA in a single batch.
- ⚡ Zero-cost trial with instant CTA Builder access
- 🎯 Keeps every face, product, and tone on-message across ratios
- 📈 Business owners save ~$4–6K/mo on agencies and media freelancers
me as superman flying through the air fast into space.
Avg render time (latest batch)
12 seconds
Social posts launched
4,100+
Reference angles needed
Front · Left · Right
Capabilities
Custom software built to ship—not to demo.
Web apps, mobile apps, and AI integrations engineered end-to-end by a senior engineer. Your code, your repo, your ship date. No middle layers.
Custom Software Development
Web apps, APIs, and internal platforms built for production. Full-stack engineering across TypeScript, PHP, .NET, and Python—designed to scale, documented to maintain, owned by you.
See how I engineer itiOS & Android Apps
Native iOS (Swift/SwiftUI) and Android (Kotlin/Compose) apps—plus Kotlin Multiplatform when you need both without doubling the cost. App Store and Play Store ready.
See shipped appsAI Integration & Training
LLM systems that survive production: agentic workflows, RAG pipelines, and custom tooling. Plus self-serve training through three published books and the Generative Identity Engine.
See AI capabilitiesEnterprise WordPress
Custom themes, custom plugins, headless WordPress, and performance tuning. Content systems that stay fast at scale and integrate cleanly with the rest of your stack.
See WordPress workAbout Kevin
Senior engineer. Builder by hand.
I build production software. Web, mobile, and AI systems shipped end-to-end. 20+ years of code behind me—PHP, .NET, Swift, Kotlin, TypeScript, Python—which means I skip the handoffs and ship the thing myself.
Most of my Fortune 100 and Fortune 500 work runs through Champlin Enterprises, LLC—senior engineering on AI integration, platform rebuilds, and custom software for companies like Wells Fargo and household-name consumer brands. No junior handoffs, no offshore layers.
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I also work with local businesses—restaurants, nonprofits, chambers, the occasional chiropractor. Community matters. Same engineer who ships for a global apparel brand is the same one who'll build your storefront or your booking app.
- Fortune 100 & 500 engineering Through Champlin Enterprises—AI integration, platform rebuilds, custom software under NDA.
- Mobile & web builds iOS (Swift), Android (Kotlin), cross-platform (KMP), and full-stack web apps—shipped end-to-end.
- Local businesses welcome Community work matters. Same senior engineer, same standards, scoped to fit.
New from Kevin Champlin
Three books on practical AI — for operators, builders, and everyday users.
Just Use It is the no-jargon guide to ChatGPT, Gemini, and Claude for parents, students, business owners, and seniors. The Operator's Edge gives small business owners a 30-day plan to deploy AI across the whole business. Ship It is the field report on using AI to build two working apps in a single afternoon.
- Available on Amazon Kindle
- No technical background required
- Read in a weekend, apply the same week
Why hire me
One engineer. Full accountability. Shipped code.
20+ years in production
Code shipped at Fortune 100 banks, global consumer brands, and your-block local businesses. Same engineer, same standards.
Full-stack, cross-platform
Web, iOS, Android, APIs, and data—engineered together so your product doesn't live on a handoff boundary.
AI that survives production
LLM integrations built past the demo: guardrails, verification, cost control. Real systems, not prototypes.
Ships without ceremony
Direct work. Weekly demos if you want them. Code you own, in your repo, the moment it's written.
From the journal
Notes on AI strategy, agentic workflows, and leading teams through adoption.
For more writing, see the Champlin Enterprises, LLC blog.
Improving Delivery Speed with Private AI Tools
Enhance your business processes by accelerating delivery speed using private AI tools.
Read more
Journal
How I Cut My Claude Token Usage in Half Without Losing Capability
How I Cut My Claude Token Usage in Half Without Losing Capability
Most Claude users burn through their usage limits without realizing the biggest cost driver isn't their prompts — it's the invisible context accumulating in every conversation. Here's how I optimized my workflow to get more done with less.
Read more
Journal
Anthropic Accidentally Leaked Claude Code's Source — Here's What It Means
Anthropic Accidentally Leaked Claude Code's Source — Here's What It Means
Anthropic shipped a source map in their npm package that exposed the full Claude Code CLI source. What was revealed, why it matters, and what every dev team should learn from it.
Read moreCommon questions
Frequently asked questions
What does Kevin Champlin build?
Custom web applications, iOS and Android apps, and AI integrations—shipped end-to-end. Kevin engineers full-stack systems across TypeScript, Swift, Kotlin, PHP, .NET, and Python. Code lives in your repo, owned by you, built to scale in production.
Does Kevin work with Fortune 500 companies?
Yes. Most enterprise work runs through Champlin Enterprises, LLC—senior engineering for Fortune 100 banks, global consumer brands, and household-name apparel and beverage companies. Engagements are under NDA; the standard is not.
Does Kevin take on local business projects?
Absolutely. Local businesses, restaurants, nonprofits, chambers, and small operators are welcome. Community matters. The same senior engineer who ships for Fortune 500 clients builds local projects with the same standards, scoped to fit.
How much does a custom build cost?
Small projects and focused sprints start under $10k. Most mobile apps and custom platforms land in the $25k–$100k range depending on scope. Ongoing retainers and fractional engineering are quoted individually. Flat fee where possible, so you know the number before you sign.
Does Kevin offer AI training?
Yes—self-serve. Three published books covering practical AI for operators, builders, and everyday users. Plus the Generative Identity Engine (GIE), a hands-on platform for multi-product, multi-spokesperson AI campaigns. Training through content and tools, not hour-billed coaching sessions.
What tech stacks does Kevin work with?
20+ years across PHP, .NET, C#, TypeScript, JavaScript, Swift, Kotlin, and Python. Mobile in Swift/SwiftUI (iOS), Kotlin/Compose (Android), and Kotlin Multiplatform (cross-platform). AI integration with Claude, GPT, Gemini, and custom agentic toolchains. Legacy modernization across Visual Basic and Classic ASP when it comes with the territory.
Start a project
Custom software, a mobile app, or an AI integration?
Send me the details—what you're building, what's in the way, what ship date you need. I'll reply within 24 hours with a realistic plan, not a sales pitch.
- Location Naperville + La Salle, IL · working globally
- Fit Fortune 100/500 via Champlin Enterprises · local businesses welcome
- How it runs Your repo, your code, direct with me. Weekly demos if you want them.