.NET Development Services: ASP.NET Core Web Apps, APIs, and Legacy Migrations
We take on .NET builds as a senior engineering service: ASP.NET Core web apps and Web APIs, enterprise backends, and moving legacy .NET Framework code onto a modern, cross-platform stack. It is a newer service line for us, so we will say so plainly. You get senior engineers, a written scope, and a flat INR quote, and we lean on the API design, testing, CI, and migration work that carries straight over from the rest of what we build.
A senior team taking on .NET, and honest about where we stand
buildbyRaviRai is a web and software development agency in Noida, Sector 62, in Delhi NCR, running since 2021. Across all our work we have shipped 56+ projects for clients in India, the United States, the UK, Canada, and the UAE. Our production stack is mostly Next.js, React, Node.js, TypeScript, Laravel, and Flutter, so we will be straight with you: .NET is a service line we added on purpose, not a decade-old portfolio we are dressing up. What carries over is the part that actually decides whether a backend build succeeds.
A well-built ASP.NET Core API is not fundamentally different from a well-built Node or Laravel one. The same discipline around clean HTTP contracts, database schema and versioned migrations, auth, tests, and CI is what separates a backend that lasts from one that quietly rots. That discipline is where our senior engineers spend their days. C# and ASP.NET Core are mature, heavily documented, strongly typed, and genuinely good to work in, so getting productive is a matter of applying engineering we already do, not learning to code from scratch.
We staff .NET work with senior people, scope it in writing, and quote a flat INR number before any code is written. If a project needs deep, specialized .NET internals that sit outside what we can deliver well, we tell you rather than take the money and learn on your budget. That honesty is the reason to hire a small senior team instead of a sales-led vendor in the first place.
What we build with .NET
The .NET work we take on, all of it on current .NET (8, the long-term-support release) and ASP.NET Core, each with a written scope and a flat INR quote before we start.
REST and minimal APIs on ASP.NET Core with clean controllers or minimal endpoints, model validation, JWT or OAuth auth, and OpenAPI docs. The backend behind a web front end, a mobile app, or a partner integration.
Server-rendered MVC and Razor Pages apps, or a .NET API paired with a React or Next.js front end. A good fit for admin panels, internal line-of-business tools, and customer portals in a Microsoft-standard shop.
Interactive web UI written in C# with Blazor, when a team wants one language across front and back and less JavaScript to maintain. We will tell you honestly when Blazor fits and when React is the safer pick.
Business logic, background jobs, and integrations with SQL Server, message queues, payment gateways, ERPs, and third-party APIs. Entity Framework Core for data access, with real, versioned migrations rather than hand-edited schemas.
Moving .NET Framework 4.x, older MVC5, or WebForms apps onto .NET 8 and ASP.NET Core, incrementally, so the business keeps running while the code modernizes. There is more on how we run these below.
New features, performance work, and maintenance on an existing .NET codebase, month to month, when you want senior hands on it without hiring a full in-house team.
When .NET is the right call, and when it is not
A backend stack is close to a ten-year decision, so it is worth getting right. Here is where we would point you toward .NET, and where we would point you elsewhere.
- You already run on Microsoft: SQL Server, Azure, Active Directory, or a team that standardizes on C#. .NET fits that estate with far less friction than bolting on a different runtime.
- You need a fast, strongly typed backend for high-throughput APIs. ASP.NET Core on Kestrel is genuinely quick, and static typing catches a whole class of bugs before they reach production.
- You are modernizing an old .NET Framework or WebForms app and want to stay in the same language and hiring pool instead of rewriting in something unfamiliar to your team.
- Your team hires C# developers and will own the code after us. Handing a Node or Laravel app to a .NET team, or the reverse, is a real long-term cost worth avoiding.
- If none of that is true and you are starting fresh with no Microsoft ties, we will often steer you to Node or Laravel instead, the stacks we run deepest in. Saying that costs us the .NET brief and saves you money, which is the trade we would rather make.
How a legacy .NET migration runs
Rewrites that freeze the business for six months are exactly how migrations fail. We move incrementally so the app keeps serving users the whole way through.
We read the existing codebase, database, and integrations and document what it does, what is load-bearing, and what is dead. You get an honest picture and a plan before any rewrite begins.
We put clean API boundaries around the old system, a strangler pattern, so new .NET 8 code and the legacy app can run side by side and hand off traffic module by module.
We move features onto ASP.NET Core and Entity Framework Core one slice at a time, with tests around each slice, so behavior is proven on the new stack before the old code is switched off.
Once a module is live and stable on the new stack, we retire the legacy path, then hand over full code, docs, and CI so your team can run it without us.
How we build, and what we are honest about
The engineering standard is the same one we hold every backend to, .NET or not. The honesty about a newer service line is part of the deal, not a caveat we bury.
- Senior engineers on your project directly. No account-manager layer, no offshore handoff, no juniors swapped in after the sale.
- A written scope before any code, and a flat INR quote inside 24 hours, so the price is set before we start. USD invoicing to a foreign parent entity if that suits your accounting.
- Automated tests and CI in the build from the start, not bolted on later. For a strongly typed C# codebase that discipline is most of the reason to choose it.
- You own the code, the repo, the database, and the hosting. Nothing is locked to us, and you can leave with everything at any point.
- We are straight that .NET is a newer service line for us, not a decade-long portfolio. What is not new is the engineering discipline underneath it.
- If your build needs specialized .NET internals beyond what we can deliver to a senior standard, we say so up front rather than learning on your budget.
Frequently asked questions
Do you have a .NET portfolio?
Not a long one, and we will not pretend otherwise. .NET is a service line we added deliberately. Our shipped work is mostly Next.js, React, Node.js, Laravel, and Flutter across 56+ projects since 2021. What transfers directly to .NET is the part that actually decides a backend: API design, database migrations, testing, CI, and moving legacy systems onto modern stacks. We staff .NET work with senior engineers and price it against a written scope.
What version of .NET do you build on?
Current .NET, which is .NET 8, the long-term-support release, with ASP.NET Core for web apps and APIs and Entity Framework Core for data. It is cross-platform, so it runs on Linux and in containers, not only Windows. If you are on an older .NET Framework 4.x app, we plan a path onto .NET 8 rather than leaving you on a runtime that is winding down.
Can you migrate our old .NET Framework or WebForms app?
Yes, and we do it incrementally so the business keeps running. We audit the existing code, wrap clean API boundaries around it, then move features onto ASP.NET Core one slice at a time, with tests around each, before switching the old path off. A big-bang rewrite that freezes the app for months is how these go wrong, so we avoid it by design.
Should we pick .NET or Node and Laravel for a new backend?
If you already run on Microsoft, SQL Server, or Azure, or your team hires C# developers, .NET is the low-friction choice and we will build it. If you are starting fresh with no Microsoft ties, we will often point you to Node or Laravel, the stacks we run deepest in, because the honest answer serves you better than winning the .NET brief. We talk it through before you commit to either.
Who works on my .NET project?
Senior engineers, directly. We are a small team out of Noida: founder and lead developer Ravi Rai plus a project manager, a designer, and an SEO specialist. You talk to the people writing the code, there is no offshore handoff, and nobody is swapped for a junior after the sale.
How do you price .NET development?
A flat INR quote against a written scope, with the exact number back within 24 hours. There is no per-hour meter running quietly in the background. If you are a foreign parent company, we can invoice in USD to your entity. Our pricing page and website cost calculator have more detail before you even talk to us.
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A senior team, a written scope, and a flat quote in 24 hours. No sales deck, no offshore handoff.