About Jim Mosier
Hi. I'm Jim. I've been building software since I was 13. Here's what 40 years looks like.
I started on a TRS-80 COCO 2 in Oklahoma City. Taught myself to program from magazines. Built things that worked. Built things that didn't. Learned more from the ones that didn't. Founder of MosierData. Based in Lakeland, Florida.
Start a ConversationThe background
I've seen every major technology shift. From the inside.
First client. First real system.
AL-CO Door & Window in Oklahoma City. Bob put Jim through every department in the company before a line of code was written: building screens, glazing windows, cutting glass, working the counter, doing the books. The system I built after that ran until 1999. 15 years. It lasted because it matched how the business actually worked.
The desktop era. Building real systems for real businesses.
Visual Basic, Access, FoxPro. The tools of the 90s. Manufacturing, distribution, professional services. Every project: learn the business first, build the software second. That rule hasn't changed.
The web shift. Passenger systems. Atlas Cruises.
When the web became infrastructure, I moved with it. Built the booking, manifest, and passenger management systems for Atlas Cruises. A client relationship that's now 25+ years old and still running.
MosierData, formally.
Incorporated in Lakeland, Florida. The business had been running for years; this was just making it official. Focus: custom operational software for growing businesses that had outgrown whatever they were running on.
Custom software. AI systems. Legacy modernization.
Still building from first principles. Still learning the business before writing the code. The technology changes constantly. The methodology doesn't.
The methodology
Learn the business first. Build the software second.
In 1985, Bob at AL-CO Door & Window put me through every position in the company before I wrote a single line of code. I built screens. Glazed windows. Cut glass. Worked the counter. Did the books. Went on installations.
Only after understanding how the work actually happened did I build software to improve each part of it. That system ran until 1999. Over 15 years. It didn't run that long because the code was fancy. It ran because it matched the way the business actually worked.
Every project we take on starts the same way. We don't assume we know your operation. We ask. We watch. We document. Then we build.
We scope before we quote.
No estimate before we understand the problem. A fixed-price project based on a misunderstood scope is a promise nobody can keep.
We document the business logic first.
Before any code, everything your operation depends on gets written down and validated with your team.
You own everything we build.
Source code, database, documentation. All of it. No lock-in, no ongoing licensing, no dependency on us to keep your business running.
We build for longevity, not novelty.
The systems we build are running 10, 15, 25 years later. That's not luck. It's the result of good architecture decisions made upfront.
On AI and system design
We are not an AI vibe coding shop.
AI can write code, and AI can write it fast. The hard part is architecting a system that can stand the race conditions you don't see coming. Can it withstand a security audit? Is the business logic sound? Does it handle edge cases that only show up 18 months after launch?
You have to look at all of that before you can place something in a mission-critical production system. That's systems engineering. It requires experience that no LLM has yet.
We use AI as a tool. We don't let it design the architecture.
The person
There's more to me than the work.
I live in Lakeland, Florida with my wife Angela and our Puggle, Harley. I'm a lifelong reader. Non-fiction only. I credit reading as the single biggest factor behind pretty much everything I've accomplished.
I'm a Tampa Bay Lightning fan. I was in the building for both Stanley Cup wins. I drive a Slingshot for local cruising and recently took up cycling. I'm a Christian and attend Free Life Chapel in Lakeland.
If you want to get a real feel for who I am — my sense of humor, how I think, a throwback to the 1980s BBS world I grew up in — visit JimMosier.com. It's personal, it's a little weird, and it's very much me.
The businesses we like working with are ones that take their operations seriously. Where the software isn't decoration, it's infrastructure. If that sounds like you, we should talk.
Book a Free Clarity CallLet's figure out what you actually need.
A real conversation about your situation. Not a pitch. Not a package. Just an honest look at what's going on and whether we can help.
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