Custom Software · Senior Engineering
Custom software,
actually engineered.
Production software written by a senior US-based engineer with 28 years of hands-on experience. Operations platforms, internal tools, integrations, modernization. One engineer, every line of code, no handoffs.
When custom software is the right call
Off-the-shelf SaaS is the right call for commodity functions. Custom software is the right call when the way your team operates is the actual competitive advantage. The moment your team is duct-taping spreadsheets, exporting CSVs across four tools, or paying for SaaS modules that almost fit, you are paying twice — once in subscription fees and once in the operational tax of the workaround.
What we build
Operations platforms that replace a spreadsheet that has been holding the business together for a decade. Internal tools that compress a five-step manual process into one click. Data and API integration plumbing that makes ten systems behave like one. Modernization of legacy applications that the original developer left behind years ago. Every project is engineered to be operated for the long run — not handed off and forgotten.
The senior-engineer difference
Most agency engagements layer junior developers, project managers, and account executives between the business and the person writing the code. The architectural decisions get made too early, by someone too removed from the business, and the project absorbs the cost of every misread requirement for the rest of its life. Champlin Enterprises removes those layers. One senior engineer with 28 years of production experience makes the call, writes the code, and stands behind it.
Where we work
Headquartered in Chicago, Illinois — serving Fortune 500 businesses nationwide and regional businesses across Chicagoland, Lake County, the North Shore, and the Illinois Valley. Remote-first when remote works, on-site when on-site matters.
What this looks like in practice
Operations platforms
Manufacturing, distribution, healthcare, dealership, and field-service tooling. Built around how your business actually runs.
Internal tools
The five-step manual workflows that should be one click. Senior staff time is too expensive to spend on copy-paste.
Integration & data plumbing
CRMs, ERPs, payment systems, ticketing, and the long tail of internal databases — all behaving as one system.
Modernization & rebuilds
Legacy PHP, classic ASP, ColdFusion, jQuery monoliths — assessed honestly, modernized strategically, no rewrite-religion.
FAQ
Common questions
When does custom software make sense vs. SaaS or low-code?
When the workflow is the business. SaaS is the right call for commodity functions — accounting, CRM, helpdesk. Custom software is the right call when the way your team operates is the actual competitive advantage and forcing it into a templated tool gives that advantage away.
Who actually writes the code?
Kevin Champlin, personally. Every line. No offshore handoffs, no junior developers learning on your dollar, no account managers between you and the engineer. That is the entire model.
How long do typical engagements take?
Sprint engagements run two to six weeks for a focused, scoped problem. Build engagements run two to six months for a meaningful production system. Multi-quarter Build and Fractional engagements are available for larger or longer programs.
What stacks do you ship on?
Laravel, Next.js, Node, TypeScript, PHP, Python on the backend. React and Next.js on the web. Kotlin Multiplatform for cross-platform mobile. Postgres, MySQL, and Redis on the data layer. Hosting on AWS, Vercel, or hardened Plesk-managed servers depending on the operating profile.
Do you handle hosting and operations after launch?
Yes. Production hosting, deploys, monitoring, and ongoing maintenance are part of the engagement. Software that ships and then breaks two months later is not really shipped.
Can you take over an existing codebase that someone else built?
Yes — and that is one of the most common engagement shapes. A senior engineer assesses the existing code, lays out the realistic options (stabilize, refactor, or rebuild), and then executes the path you choose.
Do you sign NDAs and standard MSAs?
Yes. Standard NDAs and MSAs are signed before code is written. For Fortune 500 engagements, work routes through the appropriate legal and procurement channels.
A softer step
Not sure if you even need this kind of work?
Most businesses don't need a custom build — they need 30 minutes of real conversation to figure out whether they do. That's what the Free AI Opportunity Audit is: thirty minutes on Zoom, three concrete places AI quietly pays for itself in your business, a one-page plan emailed within 48 hours. No pitch. No follow-up sales sequence. You keep the plan whether or not we ever work together.
Custom software, engineered for the long run.
A real problem, a real budget, one senior engineer doing the work. The application takes ten minutes.
30-minute call. One-page plan emailed within 48 hours. No pitch deck.