About QOS Software
How We Work: Six Principles Behind Every Build
The standards a founder-led team holds itself to on every project.
Relationships First
We build long-term partnerships, not one-off transactions — the relationship outlasts the project.
Plain-English Communication
We explain technical decisions in plain language, without hiding behind the jargon wall.
Honest, Predictable Scoping
Scope is agreed openly up front, so there are no surprise change orders mid-build.
Quality & Security in the Code
Secure, tested, and standards-based from the first commit — not bolted on at the end.
Engineering Discipline
Documented, maintainable software you can keep growing on long after launch.
Senior-Led Accountability
Every developer on your project is senior — AI handles the junior-level work — and a founder-led team answers for all of it, start to finish.
The Difference a Founder-Led Software Partner Makes
Most software gets built through layers of account managers and junior hand-offs. Here's what changes when the people building it are the people you talk to.
A typical dev shop
- Account managers relay your needs
- Surprise change orders mid-build
- Junior developers learning on your budget
- Code no one can maintain after launch
A founder-led partner
- The founder in the room from day one
- Scope agreed honestly up front
- Senior developers only — AI handles the junior work
- Documented, secure, maintainable code
Our Story: Nearly Two Decades of Building Software
The QOS family has delivered software since 2007. QOS Software carries that development practice forward — the same discipline of building applications that solve real business problems, now focused entirely on custom software for the companies and founders who depend on it.
Nearly two decades is a long time in software. It means we’ve watched platforms, languages, and best practices turn over more than once, and we’ve built through all of it — from early custom builds to the web, mobile, e-commerce, and business applications we design and ship today. Longevity like that isn’t a trophy; it’s the reason we can tell you honestly what will still be standing in five years and what won’t.
QOS Software is a QOS Holdings company — part of the QOS family of companies since 2007, alongside sister firms in managed IT, staffing, and AI. That structure gives a founder-led team the backing of a larger organization, without the layers of hand-offs that come with a big-shop build.
Who Is QOS Software?
QOS Software is a founder-led custom software development company in the QOS family of companies, designing and building web, mobile, e-commerce, and business applications since 2007. In plain terms: we build the software you can't buy off the shelf.
- Web application development
- Mobile app development (iOS & Android)
- E-commerce development
- Business & workflow applications
- API & third-party integrations
- UI/UX design
- Application modernization
- Ongoing support & maintenance
Meet Aaron Mason, Founder & CEO
Aaron Mason founded the practice in 2007 and has been CEO since 2018, bringing more than 30 years of leadership experience in technology. Founder-led isn't a tagline here — it's an operating model: when you hire QOS Software, the person whose name is on the company is accountable for the work.
- Direct access to the decision-maker
- Senior engineers, not junior hand-offs
- Continuity across the whole build
- A name behind the work
“We build strong relationships, ask for feedback often, and tailor every solution to the customer — that’s been our playbook since day one.”
How We Work With Clients
Every engagement runs the same path: discovery, honest scoping, a build shipped in reviewable increments, and support after launch. We're a founder-led team of senior developers, not a 500-seat body shop billing junior hours. If you want the cheapest possible commodity hourly rate, we're the wrong door. If you want a standalone AI product, that's our sister company QOS Agentic — we'll introduce you. What you get here is the founder in the room and honest scoping.
- Scope and estimate openly
- Design before we build
- Ship in reviewable increments
- Test for quality and security
- Document what we deliver
- Support after launch
Where We Work & Who We Build For
Our corporate office is at PO Box 14, Sheridan, IN 46069, with a branch office at 728 Northwest Highway, Suite 270, Fox River Grove, IL 60021. We build for clients nationwide — the work is remote-friendly by nature, so where you are matters far less than what you're building.
Download the Custom Software Partner Evaluation Checklist
Choosing who builds your software is high-stakes and hard to compare — every shop's website says the same things. This checklist gives you the exact questions to ask on scope, ownership and IP, security, communication, support, and exit. Walk into any vendor conversation able to tell substance from sales.
Frequently Asked Questions About QOS Software
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What is QOS Software?
QOS Software is a founder-led custom software development company in the QOS family of companies. Since 2007 it has designed and built web, mobile, e-commerce, and business applications — the custom software businesses can't buy off the shelf. Its corporate office is in Indiana, with a branch in Illinois and clients nationwide.
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How long has QOS Software been in business?
The QOS family has delivered software since 2007 — nearly two decades. That tenure describes the development practice itself: the team has built through multiple generations of platforms and languages, which is the experience behind every project QOS Software ships today.
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Who owns QOS Software, and how does it relate to QOS Consulting?
QOS Software, LLC is a QOS Holdings company, a sister to QOS MSP (managed IT), QOS Staffing (staff augmentation), and QOS Agentic (AI). QOS Consulting is the original firm founded in 2007 and is an independent sister company within the QOS family — not the parent of QOS Software. All four Holdings companies share the "since 2007" heritage.
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Where is QOS Software located?
QOS Software's corporate office is at PO Box 14, Sheridan, IN 46069, with a branch office at 728 Northwest Highway, Suite 270, Fox River Grove, IL 60021. It builds custom software for clients nationwide, so location is rarely a constraint on who it can work with.
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What kind of software does QOS Software build?
QOS Software builds web applications, mobile apps for iOS and Android, e-commerce platforms, and business and workflow applications, plus API and third-party integrations, UI/UX design, application modernization, and ongoing support. See web application development and e-commerce development for two of its core practices.
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Does QOS Software also do AI, staffing, or managed IT?
No. QOS Software builds custom software; its sister companies own the rest. Standalone AI, agents, and automation are QOS Agentic (qosagentic.com); staff augmentation and contractors are QOS Staffing (qosstaffing.com); managed IT, help desk, and security operations are QOS MSP (qosmsp.com). QOS Software will introduce you to the right one.