Independent engineering,
deliberately small.
DPM Enterprise LLC is a privately held software engineering firm based in Quincy, Illinois. We build custom web applications and operate them for clients who expect the work to be done right the first time.
DPM Enterprise was founded on a simple premise: most businesses that hire software teams end up frustrated — by account-management layers, billable-hour surprises, and deliverables that look like every other template on the internet. We built this firm to be the opposite of that.
We handle the full engineering stack: frontend design, backend architecture, database modeling, API development, deployment, and the ongoing operations required to keep production systems healthy. Every engagement is scoped, quoted, and contracted in writing before any code is written — and every deliverable transfers to you on final payment.
Our clients range from solo operators launching their first product to established businesses modernizing legacy systems. If software can solve your problem, we want to hear about it. If we’re not the right fit for your engagement, we’ll tell you directly and, where we can, point you toward someone who is.
Derek Deppermann
Derek founded DPM Enterprise LLC in 2026 after years of building production systems for operators who needed real software, not marketing deliverables. He personally leads every client engagement — from first conversation through deployment and ongoing operations — and is accountable for the quality of the work that ships.
Company Information
What we stand for.
Six commitments we hold ourselves to on every engagement — scoped up front, measured at delivery.
Speed Without Shortcuts
We ship quickly because we’re experienced, not because we cut corners. Clean code, thorough testing, predictable delivery.
Fixed-Price Contracts
You get a written quote before work begins. The price doesn’t change unless the scope does — and only with your written approval.
Full Code Ownership
You own everything we build on final payment — source code, assets, documentation. No vendor lock-in, no recurring license fees.
Transparent Process
Weekly status reviews, live demos, direct communication. You always know exactly what’s shipping and when.
Post-Launch Support
We don’t disappear after deployment. Every engagement includes a warranty period and optional managed-operations retainers.
Security First
Every application we ship follows security best practices — encrypted connections, authenticated access, and regular dependency audits.
Interested in Working Together?
We take on a limited number of new engagements at any given time. Tell us about your project and we’ll let you know if we’re the right fit.