We build robust, enterprise-grade applications and APIs on .NET and C#, from modern web platforms to long-lived line-of-business systems. Our team delivers maintainable, well-tested code that holds up under real production demands.
Customer Reviews
I was astonished that, in such a short period of time, something that other companies had taken months to understand, this company was able to execute. Since then, we have never looked anywhere else. I would never consider another company. This is how much we believe in them.
The other agencies we looked at, frankly, wanted to tell us how great they were. Sembit instead asked a lot of probing questions and provided the kind of consultation that really made us comfortable in hiring them.
It's been excellent every step of the way. The initial conversations were excellent — we had an instant human connection. In addition to being professional, they also had a human touch that's irreplicable.
I've really loved working with them. Sembit always delivers what they say they're going to deliver, in the time they say they'll deliver it. Whenever we have a deadline for a task delivery, the team gives us detailed and frequent updates about their progress. It's been a great partnership.
Sembit's team really took on the mindset of our business which resulted in a better product with thoughtful decisions from developers. We have been able to have healthy discussions about the pros and cons of a design choices which ultimately makes a better product in the long run.
Sembit has over-delivered on their promises at every step of the process. They've come in ahead of schedule and below budget, and they let us know if we are asking for too much. They are clear communicators, and it made a world of difference for our company.
Enterprise Legal Review Platform
One interesting ASP.NET application we created was a global legal review platform used by large law firms with hundreds of attorneys.
The challenge was to build a system that could handle large-scale “360-degree reviews,” where employees review peers, managers, and direct reports. Each engagement required custom questionnaires, dynamic workflows, and participation across time zones.
We built a flexible ASP.NET application that allowed administrators to:
The platform supported thousands of concurrent users across regions like Singapore and the United States. It was used repeatedly for new review cycles, each with different requirements.
Customer Portal
We have worked extensively with ASP.NET in B2B environments, including large-scale platforms for manufacturing and distribution companies.
One example is our work for a large auto parts manufacturer. They had an existing Java-based order entry portal that needed to be rebuilt. We improved order entry and adding the ability to make warranty claims.
This project required:
ASP.NET was a strong fit because it allowed us to build structured, server-driven workflows that prioritized reliability over flashy front-end behavior.
Internal Business Systems and Admin Platforms
Many ASP.NET projects are internal or administrative systems rather than public-facing applications.
We have built and maintained many internal platforms that support operations such as:
ASP.NET MVC and Razor Pages are particularly effective in these environments because server-side rendering simplifies architecture and reduces unnecessary complexity.
These are the situations where teams most often bring us in for .NET and C# work, from building new web platforms and APIs to maintaining and modernizing long-lived line-of-business systems.
Many ASP.NET applications are built for internal use rather than public-facing products. These systems support operations such as administration, reporting, and workflow management. Because they are used inside organizations, page refreshes and traditional navigation are not a problem. Server-side rendering makes these systems simpler and more maintainable. This makes ASP.NET a strong choice for internal business tools.
Oregon-Based ASP.NET Development Team
Projects completed
Years in business
Average Years Experience per Employee
Our team is based in Oregon and has decades of experience working within the Microsoft ecosystem. We have built and maintained ASP.NET applications since the early days of the framework and have worked through multiple generations of Microsoft's technology stack.
This experience matters because Microsoft technologies evolve frequently. ASP.NET has gone through multiple naming conventions and architectural shifts, including MVC, Razor Pages, and now Blazor. Many development teams only understand one generation of these tools, while we understand how they all connect and how to work across them.
We work directly with clients in real time, without time zone delays or communication gaps. This is especially important when dealing with complex business logic, integrations, or production issues that require immediate attention.
Our approach is not just to build what is requested. We evaluate the system, ask deeper questions, and help clients make better decisions about architecture, scalability, and long-term maintenance.
Tell us more about your custom ASP.NET development needs. We can help.
Get expert guidance from Nathan Theophanes (Sembit's President) and Shaun Davidson (Sembit's VP) regarding your ASP.NET project. We'll be in touch in hours, not days.
ASP.NET applications often include structured authentication systems with role-based permissions. Different users have different access levels depending on their responsibilities. We build secure login systems, user management tools, and permission layers. These features are critical for internal systems and B2B platforms. They ensure data is protected and workflows are controlled.
Many ASP.NET applications revolve around structured data entry and processing. This includes forms, workflows, and approval systems. We build flexible systems that allow businesses to define and adjust their processes.
ASP.NET is often used to generate reports and aggregate large volumes of data. We build systems that collect, normalize, and present data in meaningful ways. This includes dashboards, exports, and analytics tools. Reporting is especially important in enterprise environments where decisions depend on accurate data.
ASP.NET applications frequently integrate with other Microsoft products such as SQL Server, Azure, and Active Directory. We build systems that connect seamlessly within this ecosystem. This allows companies to leverage their existing infrastructure. Integration reduces duplication and improves efficiency. It is a key reason many companies choose ASP.NET.
We improve performance for ASP.NET apps by optimizing database queries, reducing unnecessary network round trips, and structuring applications efficiently. Quicker response time enables faster data entry and happier users.
Blazor is Microsoft's latest approach to building interactive web applications using C#. It allows code to run either on the server or in the browser via WebAssembly. We have experience working with Blazor and can help evaluate whether it is the right fit for your particular business needs.
FAQs About Our Custom ASP.NET Development Services
Not necessarily. Many ASP.NET applications can be migrated without doing a complete rewrite. We recommend migrating to a supported version of the .NET framework.
Yes. Many clients do not know the exact technology stack they are using. They may describe it as a website or portal. We can review your system and quickly identify the underlying technology. From there, we can recommend the best path forward.
It depends on your goals. Blazor is a newer technology, but it is not always the best migration target. Razor Pages are more appropriate for server-side rendering, and MVC is appropriate if you are open to using a TypeScript-based framework for your front-end. We help evaluate which combination of web technologies you should use given your unique situation.
Yes. We regularly integrate ASP.NET applications with ERPs, CRMs, and other business systems. Integration is one of the most common requests we receive. It helps eliminate duplicate data entry and improves workflow efficiency. We design integrations that are reliable and maintainable.
Yes, especially if your organization already uses Microsoft technologies. ASP.NET is still actively supported and widely used. It is a strong choice for internal systems, B2B platforms, and structured web applications. The key is choosing the right architecture for your specific use case.
ASP.NET MVC is an older but widely used routing system. Razor Pages is a newer approach that simplifies page-based development. Blazor is Microsoft's latest technology that allows more interactive applications using C#. Each has its place depending on the project requirements. We help you determine the best fit.
