.NET Development Services

PS3G is a .NET development company with more than ten years on the Microsoft stack. We design, build, extend and maintain business software in C#: ASP.NET Core web applications and APIs, Blazor front ends, background services, desktop and mobile apps with .NET MAUI, and the SQL Server and Azure infrastructure under them. The work is scoped to what you need, whether you are a founder with a first version to build, an operations lead replacing a tangle of spreadsheets and Access databases, or an IT director with a .NET Framework system that has to keep running while it is modernized. You get working software, the source code, documentation and a team that stays available after launch.

Why .NET is still a strong choice for business software (and when it isn’t)

.NET is Microsoft’s open-source, cross-platform development platform. It runs on Windows, Linux and macOS, ships a new major version every year, and has a long record in the kind of software most organizations need: line-of-business applications, customer portals, internal tools, integrations and APIs. C# is a mature, strongly typed language with first-rate tooling in Visual Studio and VS Code, and the hiring pool is large.

Four reasons we recommend it often:

• Performance. ASP.NET Core runs on the Kestrel web server and performs well in independent benchmarks such as TechEmpower. Most business applications never come close to its limits, which usually means fewer servers.
• One language across the stack. With Blazor, .NET MAUI and ASP.NET Core, a C# team can cover the browser, the server, mobile and desktop without switching languages or hiring a second team.
• Fit with Microsoft environments. If you run Microsoft 365, Entra ID, SQL Server or Dynamics 365, .NET talks to all of them through supported SDKs.
• A predictable support rhythm. Even-numbered releases are long-term support (LTS) versions. Check Microsoft’s .NET support policy for the current windows rather than a date quoted in an article.

When it is not the right choice: if your team already lives in Python for data science, if the product is a content site that WordPress handles well, or if a JavaScript-only team will own the front end. We work in those stacks too and will say so. Our guide on whether .NET is still relevant covers the trade-offs in more detail.

What we build with .NET

Most of our .NET development services fall into six kinds of work.

Web applications

Customer portals, back-office systems, booking and scheduling tools, document workflows and SaaS products built on ASP.NET Core with Razor Pages, MVC or Blazor. Our web application development page explains how we scope a web project from the first screen to launch.

APIs and integrations

REST and gRPC APIs on ASP.NET Core with OpenAPI documentation, authentication through Entra ID or ASP.NET Core Identity, and integrations with payment providers, CRMs, logistics systems and partner APIs. We also connect .NET applications to the platforms described on our ERP solutions page.

Blazor front ends

Interactive user interfaces written in C# instead of JavaScript. Blazor development suits teams that want one language end to end, internal applications with many forms and grids, and products where the .NET team owns the UI.

Background services and scheduled jobs

Worker Services that run as Windows services, Linux daemons or containers; queue consumers on Azure Service Bus; scheduled processing with Hangfire or Quartz.NET; serverless functions on Azure Functions.

Desktop and mobile with .NET MAUI

.NET MAUI development for apps that run on Windows, macOS, iOS and Android from one C# codebase, plus WPF and Windows Forms work where an existing desktop application needs new features rather than a rewrite.

Data and reporting

SQL Server schema design, Entity Framework Core data layers, reporting with SQL Server Reporting Services, and dashboards through our Power BI consulting service.

ASP.NET Core, Blazor, Entity Framework, SQL Server, Azure: our stack

Layer	What we use	Notes
Language and runtime	C# on the current .NET LTS release	We keep projects on a supported version and plan the annual upgrade with you
Web	ASP.NET Core: Razor Pages, MVC, minimal APIs, SignalR	Kestrel behind IIS, Nginx or Azure App Service
Front end	Blazor (static server rendering, Interactive Server, WebAssembly, Auto), or React or Angular against a .NET API	The choice depends on your team and SEO needs
Data access	Entity Framework Core, Dapper	Migrations, query review, indexing
Databases	SQL Server, Azure SQL, PostgreSQL, Cosmos DB, Cassandra, Redis	Relational by default; NoSQL where the data model calls for it
Cloud	Azure App Service, Azure Functions, Container Apps, AKS, Key Vault, Service Bus, Storage, Application Insights	AWS and Google Cloud where you already run there
Identity	Entra ID, ASP.NET Core Identity, OpenID Connect	Single sign-on for staff, external identities for customers
Delivery	Git, GitHub Actions or Azure DevOps pipelines, Bicep or Terraform, Docker	Every project ships with a pipeline
Testing	xUnit, NUnit, WebApplicationFactory, Playwright, k6	Run with our testing center of excellence

Blazor deserves a note. Since .NET 8, a Blazor Web App can render components statically on the server, make them interactive over a SignalR connection (Interactive Server), run them in the browser on WebAssembly, or start on the server and switch to WebAssembly once the runtime has downloaded (Interactive Auto).

We pick the render mode per page, which is why a Blazor application can load quickly and still be fully interactive where it matters. Blazor Hybrid lets the same components run inside a .NET MAUI desktop or mobile app. Our comparison of Blazor and React goes deeper.

Cloud hosting is covered on our cloud solutions page. The short version: we are vendor-neutral and will host on Azure, AWS or Google Cloud depending on where your data and people already are.

Modernizing existing .NET Framework applications

A large share of the .NET work we are asked about involves software that already exists: an ASP.NET MVC application on .NET Framework 4.x, a WebForms intranet, a WCF service layer or a VB.NET desktop tool. .NET Framework 4.8 is the last major version of the Windows-only framework. Microsoft continues to service it as a Windows component but does not add features, and new libraries and tools target modern .NET. Check Microsoft’s lifecycle page for the current support status of each version rather than relying on a date you read elsewhere.

We handle this as a separate, assessment-first service. Microsoft’s .NET upgrade tooling and a dependency analysis tell us what can move in place and what needs redesign. From there we choose between an in-place upgrade, a strangler-fig migration where the new application takes over route by route, or a targeted rewrite of the parts (WebForms, WCF) that have no direct equivalent. Read how it works on our .NET migration and modernization page, and see application modernization for systems that are not .NET at all.

Hire .NET developers or a dedicated .NET team

Not every need is a project. If you have a product owner, a backlog and a codebase, you may just need more hands that know ASP.NET Core and Azure. We provide C# developers, Blazor and front-end developers, SQL Server and data engineers, Azure and DevOps engineers, and QA engineers, individually or as a dedicated team with a lead.

• Engineers in Wilmington, Delaware and at our India delivery center, with overlap into US working hours and the option of round-the-clock coverage.
• Monthly engagements that scale up or down with notice; no long lock-in.
• Your tools, your repositories and your process, or ours if you do not have one yet.
• Interviews before placement, and a replacement if someone is not working out.

The details of how placement works are on our staff augmentation page.

Our process and QA

1. Discovery. A first conversation, then a short assessment: goals, users, existing systems, data, constraints such as HIPAA or SOC 2, and what done looks like.
2. Architecture and plan. A written proposal with the solution design, the stack, the milestones, and a fixed-scope quote or a team plan.
3. Build in increments. Two-week iterations with a demo at the end of each. Code review on every change and a CI pipeline from day one.
4. Test. Unit and integration tests written with the code; functional, regression, performance and security testing by our testing center of excellence before each release.
5. Release. Infrastructure as code, staged environments, a rollback plan and monitoring through Application Insights or your tool of choice.
6. Maintain. Patching, dependency updates, the annual .NET version upgrade and new features under a defined SLA.

Request a fixed-scope quote for your .NET project.

Engagement models

The engineering is the same whatever your size; the engagement is scoped differently.

• Fixed-scope project. A defined deliverable, a written quote and a schedule. Suits a first version, a specific module or a migration with clear boundaries.
• Dedicated team or staff augmentation. Named engineers on a monthly basis, inside your process, scaled up or down as the roadmap changes.
• Managed services. We run and support the application under defined SLAs: monitoring, patching, upgrades and small changes.
• Advisory. Architecture review, migration assessment, .NET consulting for a team that will do the build itself, or a fractional CTO.

How we start: a first conversation, a short assessment, a written proposal.

Why PS3G as your .NET development company

• We run our own software on this stack. Our HIPAA-compliant EHR and telehealth platform, DocVilla, is built on ASP.NET MVC (C#) with a distributed NoSQL database and runs in the cloud. We live with the consequences of our architecture decisions every day, which changes how we make them for you.
• 10+ years on the Microsoft stack, with Microsoft-certified and open-source-certified engineers who will tell you when the open-source option is the better fit.
• US headquarters in Wilmington, Delaware, plus an India delivery center, so you get an accountable US contact and the scale to run around the clock.
• Full lifecycle in one place. Consulting, build, testing, cloud, managed services and the governance work (data, AI, security) around them.
• A testing center of excellence that treats QA as its own discipline rather than a task developers do at the end.

Related services

• .NET migration and modernization: moving .NET Framework, WebForms and WCF applications to modern .NET and Azure.
• Web application development: portals, SaaS and internal tools in .NET or open-source stacks.
• Microsoft technology services: Azure, SQL Server, Dynamics 365, SharePoint, Microsoft 365 and Power Platform.
• Cloud solutions: hosting, migration and cost management on Azure, AWS and Google Cloud.
• Staff augmentation: hire .NET developers into your own team.
• Application modernization: for legacy systems that are not .NET.
• Power BI consulting: reporting on the data your .NET applications produce.
• All services: the full list of what we build, modernize and run.

Guides on this topic

• How to Choose a .NET Development Company: 12 Questions to Ask
• .NET Framework End of Life: How to Migrate to Modern .NET
• Blazor vs React: Which Front End for Your .NET Application?
• .NET MAUI vs Flutter: Cross-Platform Choices for .NET Shops
• Is .NET Still Relevant for Business Software? An Honest Assessment

Frequently asked questions

What does a .NET development company actually do?

It designs, builds, tests and maintains software on Microsoft’s .NET platform: web applications and APIs in ASP.NET Core, Blazor or JavaScript front ends, background services, desktop and mobile apps, and the SQL Server and Azure infrastructure they run on. At PS3G that includes the architecture work before the build, QA from our testing center of excellence, and maintenance after launch, under a fixed-scope project, a dedicated team or a managed service.

Which .NET version will you build on?

New work starts on the current long-term support (LTS) release of .NET unless you have a reason to use a standard-term release. Even-numbered versions are LTS. We plan the annual upgrade as part of maintenance so your application never sits on an unsupported runtime. For the current support windows, check Microsoft’s .NET support policy rather than a date in an article.

Can you work with our existing ASP.NET application instead of rewriting it?

Yes. Most .NET Framework applications can be upgraded in place or migrated incrementally rather than rewritten. We start with an assessment using Microsoft’s .NET upgrade tooling and a dependency analysis, then recommend an in-place upgrade, a strangler-fig migration or a targeted rewrite of the parts with no modern equivalent, such as WebForms pages or WCF services. Our .NET migration and modernization service describes the full approach.

Do you build Blazor applications or use React with a .NET back end?

Both, and we will recommend one based on your team and your product. Blazor keeps everything in C#, which suits internal applications and teams without JavaScript specialists. React or Angular against an ASP.NET Core API suits products with a separate front-end team, heavy public-facing SEO needs or an existing JavaScript investment. Our Blazor vs React guide walks through the trade-offs.

Can we hire .NET developers from PS3G for our own team?

Yes. Through staff augmentation you can add C#, ASP.NET Core, Blazor, SQL Server, Azure, DevOps or QA engineers to your team on a monthly basis, individually or as a dedicated team with a lead. Engineers work from Wilmington, Delaware and our India delivery center, inside your tools and process. You interview before placement and can scale the team up or down with notice.

Do you host .NET applications on Azure only?

No. Azure is the natural home for most .NET workloads, and we use App Service, Azure Functions, Container Apps, AKS, Azure SQL and Key Vault regularly. Modern .NET also runs on Linux and in containers, so AWS and Google Cloud work well too. We recommend the platform your data, people and existing contracts favor, and we say so in writing before the build starts.