Power complex applications with clean, secure, and reliable .NET architecture.

.NET Development That's Solid, Scalable, and Enterprise-Ready

At QOLOS, we build robust backend systems and full-stack applications using Microsoft .NET. From enterprise platforms to custom APIs and internal tools, we deliver high-performance solutions built for security, stability, and scale.

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Dependable Code. Real Business Power.

Let’s build your next .NET project with confidence. Talk to our .NET team!

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.NET Development That's Solid, Scalable, and Enterprise-Ready

At QOLOS, we build robust backend systems and full-stack applications using Microsoft .NET. From enterprise platforms to custom APIs and internal tools, we deliver high-performance solutions built for security, stability, and scale.

What We Build with .NET

Enterprise Applications – Scalable, multi-user platforms built for long-term growth.
Custom APIs & Integrations – .NET-based services connected to ERPs, CRMs, payment systems, and more.
Internal Tools & Portals – Automate operations and streamline workflows with secure web apps.
Modernization Projects – Rebuild or refactor legacy .NET systems into fast, cloud-ready solutions.

Why QOLOS?

Experienced .NET Developers – Deep knowledge of .NET Core, ASP.NET, C#, and the Microsoft stack.
Secure by Design – We build with performance, data integrity, and compliance in mind.
Integration-Ready – Built to work with your existing systems, databases, and infrastructure.

Dependable Code. Real Business Power.
Let’s build your next .NET project with confidence.

Meet the Expert

We build custom .NET applications that are rock-solid—secure, scalable, and fully integrated with your business systems. Whether you need a new platform, internal tool, or API, we use .NET to deliver reliable solutions that hold up in the real world.

- Chad VanCalster

Contact Chad

QOLOS is everything you need to build your DREAM TEAM!

We hire the best, and that is why we are the best. You won't be disappointed.

These guys are hands down the best out there. From the very beginning the design team hit the ground running and built us multiple options to choose from. The main asset to small business is the support from the tech team. The diligence and attention to detail is a service received that you cannot put a price on. Chad is very knowledgeable and keeps the clients interest in the forefront all of the time. We have been a customer for 5 years and look forward to many years of a continued relationship. Highly Recommend. Thanks again Chad for your leadership and all you and your team do for us.

Dustin StephensonNortex Electric

Top-notch. They do what they say.

Rodney MillerYellow Cab

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about your business.

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Power complex applications with clean, secure, and reliable .NET architecture.

.NET Development That's Solid, Scalable, and Enterprise-Ready

Next Steps...

Schedule Meeting

Free Consultation

Receive Estimate

Dependable Code. Real Business Power.

Three Ways to Get Started...

.NET Development That's Solid, Scalable, and Enterprise-Ready

What We Build with .NET

Why QOLOS?

Meet the Expert

Contact Chad VanCalster

QOLOS is everything you need to build your DREAM TEAM!

We’re interested in talking about your business.

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We’re interested in talking
about your business.