.NET Software Development & Consulting Services

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Gold Microsoft Partner | 100% U.S.-Based Senior .NET Consultants | 17+ Years Avg Experience

Keyhole Software provides senior-led .NET development and consulting to organizations across the United States. With 17+ years of development experience and an average consultant tenure of 5+ years, our 100% U.S.-based senior .NET consultants deliver high-quality, full-stack solutions.

As a Gold Microsoft Partner, we bring proven expertise in C#, .NET Framework, .NET Core development, and Azure cloud technologies—always using the right tools for each project's unique needs.

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.NET Consulting Services

NET Software Development Services | U.S.-Based Senior Developers

Advisory & PoC Services

We provide strategic analysis and tailored guidance for modernizing legacy .NET applications.

Whether it's Azure cloud migration, implementing microservices, upgrading from .NET Framework to .NET Core development, or aut omating DevOps, we help organizations future-proof their technology.

Custom .NET Application Development

Our U.S.-based senior .NET developers build scalable, maintainable, high-performance web, desktop, and mobile applications from start to finish or enhance existing solutions with new features that align with your goals.

We specialize in custom .NET application development using C#, ASP.NET Core, .NET Core development, and modern cloud-native architectures on Azure.

Architecture & Design

Our architects design robust .NET ecosystems that meet scalability, security, and maintainability requirements, ensuring your system is built to evolve.

From monolith-to-microservices transformations to Azure-native and event-driven designs, we create resilient .NET architectures that scale securely and perform reliably under real-world demands.

Project Augmentation

Need to extend your team? Our 100% U.S.-based senior .NET consultants integrate seamlessly into your development team, providing just-in-time expertise in .NET software development, architecture, or leadership.

Every Keyhole consultant is a full-time employee, with no contractors or C2C arrangements, with 17+ years of average experience.

Why Choose Keyhole For .NET Development

Award - Top .NET Developers in Kansas 2025

Award - Top .Software Developers in Kansas 2025

Gold Microsoft Partner

Proven Expertise In .NET

As a Gold Microsoft Partner, Keyhole brings validated expertise in .NET technologies, ensuring businesses get the most out of modern Microsoft solutions.

Elite Competency Tier - This Microsoft partnership level signifies that Keyhole has achieved the highest level of competence with .NET technologies.

Certified Experts – Our team has proven its expertise directly to Microsoft, passing rigorous exams validating their .NET knowledge.

Proven Client Results – Clients recognized our excellence implementing scalable, high-performance .NET solutions across industries.

Trusted by 250+ Organizations – Organizations across financial services, healthcare, insurance, manufacturing, and logistics choose our .NET software development services for senior-level expertise, transparent communication, and proven delivery quality.

With direct access to Microsoft resources and a proven track record across industries, we deliver efficient, future-ready software solutions tailored to your business needs.

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Keyhole Experts

Our 100% U.S.-based .NET consultants specialize in C#, .NET Core, ASP.NET Core, Azure, and full-stack cloud architectures, helping organizations build scalable, secure, and high-performance applications.

Keyhole Software's 100% U.S.-based employee .NET consultants bring an average of 17+ years of experience across industries like healthcare, finance, insurance, energy, and manufacturing, ensuring deep .NET software development expertise and seamless collaboration.Our domestic teams work in your time zone, understand U.S. regulatory requirements (HIPAA, SOC 2, PCI-DSS), and integrate directly with your stakeholders during standard business hours.

All Keyhole consultants are vetted employees—no contractors, C2C or offshore resources—so your project benefits from high-quality code, direct real-time communication, and strategic guidance that drives real business value. In our experience, offshore delivery often introduces 8–12 hour communication gaps, which can compound decision latency and coordination overhead over time.

Trusted Partner for Software Development Consulting Services

Trusted by 250+ organizations nationwide from Fortune 100 companies to innovative startups across diverse industries including financial services, healthcare, insurance, manufacturing, transportation, and logistics.

Our commitment to quality software development consulting services keeps clients coming back: 78% of projects last year were with repeat clients, with many partnerships spanning 5 to 15+ years. This retention rate reflects our focus on long-term value, architectural quality, and strategic partnership over transactional vendor relationships.

.NET Technologies

Technologies and Tools That Our Team Has Used Recently

Our U.S.-based .NET consultants have command over a variety of .NET technologies and we've helped organizations across healthcare, finance, insurance, energy, manufacturing, and transportation modernize and scale their .NET applications.

We are tool agnostic, meaning we use the best .NET tool, framework, or technology for each project or requirement. Significant experience includes .NET Core, ASP.NET Core, C#, .NET MAUI, Xamarin, and modern DevOps practices supporting CI/CD, observability, and cloud reliability.

Recent .NET Client Successes

API Modernization & Azure Cloud Enablement

Case Study: Modernizing AMC Theatres’ Digital Commerce Ecosystem

Mobile Usability Modernization & Developer Mentorship for a Global Insurance Brokerage

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Recent Thought Leadership In .NET

Stay ahead in the ever-evolving .NET ecosystem with our expert insights.

Our thought leadership articles, tutorials, and case studies provide practical strategies, best practices, and deep technical knowledge to help developers and businesses optimize their .NET applications, architecture, and performance.

From 38 Seconds to 1.5: A Claude Code Performance Win

CI/CD for Legacy .NET Framework Apps: How to Automate Deployment Pipelines

Long-Running Workflows Made Simple with C# + Azure Durable Functions

.NET Performance Video Insight

Chief Architect Zach Gardner shares the best ways to improve .NET performance including optimizing code, utilizing efficient data structures, and leveraging caching strategies.

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.NET Software Development Services for Modernization & Azure Cloud Migration

Future-Proof Your .NET Applications with Senior .NET Consulting

Modernizing legacy applications is crucial for performance, scalability, and security. Keyhole Software's .NET software development services help organizations replatform, refactor, and migrate their applications to modern architectures—whether moving from .NET Framework to .NET Core development, transitioning to microservices, or leveraging Azure's cloud-native capabilities.

Our senior .NET consultants bring 17+ years of experience modernizing .NET applications, ensuring minimal business disruption. Our team specializes in:

Cloud Migration & Optimization
Seamless transitions to Azure, AWS, or hybrid cloud environments.

Legacy System Modernization
Upgrading .NET Framework applications to modern, scalable architectures.

Microservices & Containerization
Breaking down monoliths into agile, high-performance services with Docker, Kubernetes, and API gateways.

Performance Tuning & Cost Optimization
Enhancing application speed, reliability, scalability, and efficiency.

Recent .NET Case Study

Large-Scale COBOL Modernization and Microservices Implementation with .NET Core

"We have a very high respect for [Keyhole Consultant] and he has bailed [us] out of several potentially large, critical problems. He has done very well for us and has reflected well on your company too."
- Engineering Manager, Multi-National Railroad System Corporation

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We've provided .NET solutions to 100+ clients

Here are some frequently asked questions our clients have had about .NET services.

See Our Clients

View Our Successes

Flexible engagement models allow organizations to choose the right level of .NET software development services for their specific needs:

Software Outsourcing
Our project management + software development team builds end-to-end solutions for you.

Dedicated Dev Teams
A fully integrated, dedicated consulting team works continuously on your long-term .NET project.

Fractional & Advisory Services
Our senior software leaders provide strategic guidance to drive digital transformation.

Staff Augmentation
Our .NET developers and specialized experts join your team to accelerate development.

Whether you need a full team to build a custom .NET application, expert consultants to integrate with your existing team, or strategic guidance to modernize a legacy system, our U.S.-based, vetted consultants provide the right expertise at the right time.

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.NET microservices architecture allows applications to be broken into independent services that can be deployed, scaled, and maintained separately.

With ASP.NET Core, Docker, Kubernetes (AKS), and gRPC, we design high-performance, cloud-native applications that optimize resource utilization, enhance fault tolerance, and improve deployment efficiency. By leveraging Event-Driven Architecture (EDA) and RESTful APIs, we ensure seamless communication between microservices, resulting in a more resilient and scalable system.

Our .NET software development services span healthcare, finance, insurance, energy, manufacturing, and transportation, delivering enterprise-grade applications that prioritize security, compliance, and performance. We tailor our approach to industry-specific challenges, whether it’s optimizing financial transactions, processing high-volume healthcare data, or modernizing legacy transportation management systems.

Our 100% U.S.-based .NET consultants average 17+ years of experience. We follow best practices for clean code, unit testing, DevOps automation, and security-first development. Our consultants utilize SOLID principles, dependency injection, and CI/CD pipelines with Azure DevOps or GitHub Actions to streamline development and deployment.

In our experience, clients consistently cite our technical depth, responsiveness, and ability to deliver maintainable systems without post-launch surprises.

Yes, legacy .NET modernization is one of our core .NET software development services. We help organizations transition from monolithic .NET Framework applications to modern, cloud-ready architectures using .NET Core, Blazor, and microservices. Our team has extensive experience migrating COBOL, VB6, and outdated .NET applications to scalable, maintainable solutions that integrate with Azure, AWS, and Google Cloud environments.

Ready For Keyhole's .NET Software Development Services To Accelerate Your Project?

Let Keyhole Software provide the expert .NET developers, architects, and consultants you need to build, modernize, or scale your application. Our 100% U.S.-based senior .NET consultants deliver architectural judgment, real-time collaboration, and proven .NET software development quality.

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