Horizon Data Processing

Sioux Falls, South Dakota

Software that works as hard as you do.

A website, a simple app, a report that finally adds up, or a spreadsheet that has outgrown itself. I build and fix the technology behind small businesses, and I explain it in plain English.

Tell me what you need See what I do

  • 25+years building software
  • MCSDMicrosoft certified
  • AIassisted, human reviewed

What I can help with

Websites

A clean, fast site with your hours, services, and a way for customers to reach you. No monthly fees for features you do not use.

Spreadsheets to real tools

When a shared spreadsheet is breaking down, I can turn it into a simple database and screens your whole team can use.

Accounting and reporting

I hold an accounting and finance degree, so I speak both languages. Invoices, billing, reconciliations, and reports that tie out.

Automate the busywork

Retyping the same data, emailing the same report every Monday, copying numbers between programs. Most of it can be automated.

Fix or rescue old software

An aging program nobody dares touch, or a developer who disappeared? I can read it, document it, and keep it running or move it forward.

Senior help, done sooner

Experience plus modern AI-assisted tooling means it gets done right, and gets done sooner. Not sure you need software at all? Ask. I will tell you honestly.

About me

I am Dan Eichacker, a software developer in Sioux Falls with more than 25 years of experience. I have built billing, trading, and payment systems for state government, financial services, and a large manufacturer, systems where the numbers have to be right.

I enjoy helping local shops and small teams get the same quality of work big companies get, without the big-agency overhead. Horizon Data Processing has been my banner since 2006, and this is a side practice: I take on a small number of projects at a time so each one gets real attention.

I also build with modern AI-assisted development tools every day. Done carefully, with a seasoned developer checking the work, that means projects get finished faster, without cutting corners on quality or security.

How it works

  1. Talk. A free conversation about what you need.
  2. Quote. A clear, fixed-price quote before any work begins. No surprises.
  3. Build. I deliver in small steps so you see progress early.

Get in touch

Tell me a little about your business and what is frustrating you. I read every message and reply personally, usually within a couple of business days.