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.NET Development Services

Create scalable software solutions tailored to your business goals with senior .NET specialists

Engineer, modernize, and scale enterprise platforms through .NET software development for web, cloud, and core workflows.

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16+

years in business.

$4.8B+

in combined client revenue.

ISO 27001 & 27701

сertified security standards.

Domain-proven delivery across regulated and high-load sectors,
engineered for strict compliance, zero-failure data sync, and high-concurrency production demands.

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Services

.NET Development Services We Provide

Each .NET development project is always accompanied by some pressure points: the date of the project launch, an old system that your internal developers cannot work with anymore, or the scalability limitation you hit. Our .NET development services are oriented towards helping you overcome whichever issue you are dealing with right now. We have successfully developed .NET applications for fintech platforms processing live transactions, retail apps during the holiday season, and enterprise software used by multiple departments daily. That’s why scoping the project with us implies considering the 3x load on the system.

  • We build custom ASP.NET Core web applications, business solutions, and software products for customers from scratch. Our specialists decide which .NET framework version, which database, and which hosting to use based on how your business will look in three years, and develop the architecture accordingly. It is custom software development that is done around your process, not the other way around.

  • Our ASP.NET development services include MVC, Web API, and Blazor applications for those organizations that require high-performance software solutions able to withstand the production environment. By default, we use .NET Core and the latest version of .NET, but in some cases, we will advise that using the .NET Framework longer would be more sensible.

  • Are you using .NET Framework, Windows Forms, or an old edition of ASP.NET Web Forms? No problem. Our migration services will help you take the next step without writing a single line of code from scratch. The mapping of the legacy application, automatic versus manual porting possibilities, and staged migration allow you to keep your system working during the process.

  • Through .NET MAUI, the cross-platform development approach we adopt uses the same C# codebase for both iOS and Android applications, as opposed to having two separate teams and two separate lists of bugs for each platform. It implies that there is just one thing to fix and one team that knows both platforms.

  • As a business built around the Microsoft ecosystem, our Azure services include cloud application development by default, and AWS can be considered an alternative solution in case the customer’s infrastructure resides there. That includes Azure App Service deployments, Azure Functions, moving .NET applications to the cloud without a rewrite, and cloud services built for rapid development and deployment.

  • REST, GraphQL, and gRPC APIs are developed using .NET, and our integration services allow you to connect your .NET applications with the CRMs, ERPs, and payment systems that you use in your business processes. Most often, the integration work goes beyond the budget and is therefore explicitly scoped by us.

  • High-quality .NET software development goes beyond development and launching. After your .NET software is launched, our maintenance service will deal with bug fixing, performance management, security patches, as well as software version updates that guarantee development efficiency. We inform you about what we have found.

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What We Build

Software Solutions We Build With .NET

.NET spans more ground than most platforms, which is exactly why picking the wrong piece of it for a given job is easy to do and expensive to undo. Below are the types of software we build with it, separate from the services built around them.

  • Internal tools, workflows, and enterprise-grade software solutions designed to remain scalable with hundreds of simultaneous users. Here lies the true value of .NET’s strong type system and advanced development environment, even down to its microservices design when scaling is required. We have moved from using spreadsheets and associated macros to software solutions that can be maintained by the whole IT team.

    • Software subscriptions designed with multiple tenants in mind on shared resources where tenant isolation and billing are inherent in the system design right from the start. This involves usage-based billing, tenant-specific role-based access controls, and onboarding for a new tenant that enables self-serve functionality.

      • Branded, secure connections to your CRM, ERP, or payment gateway, offering customers and partners a place to access information that they require without sending you emails through support. We start off with role-based access right from the beginning, ensuring that a customer, a reseller, and an internal administrator have a personalized interface tailored specifically for their role, using only one codebase.

        • For our mobile application development services, we have covered .NET MAUI applications that allow you to develop one app and deliver it for both iOS and Android devices using the same C# codebase, instead of developing two separate applications that might grow dissimilar over time. And with the same codebase, feature parity is no longer a project management issue since whatever gets delivered for iOS is delivered for Android in the same release.

          • Applications based on WPF and Windows Forms for the team that still performs certain activities through the desktop application and doesn’t have to start with a web app. In most cases, such an approach is relevant for manufacturing and logistics sectors where a terminal or dispatching application should rather be developed as a desktop one.

            • Software products using .NET to consume sensor and device data generated by IoT solutions, in addition to a reporting and analytics layer to provide data-driven insights for companies. We have built such solutions for Asset and Fleet Management, which can only truly add value by identifying the failure pattern before the machine breaks.

              Tech Stack

              The Stack Behind the Work

              .NET offers something that few other stacks have when it comes to using the right tool for the job: the ability to use one platform for your web applications, your desktop application, your mobile app, and your backend services. This is something our experts look to and do in accordance with best practices.

              • Frameworks and Development Platform 

                .NET 8 and above, .NET Core, ASP.NET Core MVC, ASP.NET Web API, Blazor, and WPF for those companies that still have a need for their Windows desktop applications to be developed properly. Our default is the latest .NET version, while we use .NET Framework only when required by some dependency.

              • Programming Languages and Development Tools

                C# is the heart of every single one of our dot net projects, together with the rest of the programming languages involved in our net solutions. Additionally, for those doing data-related and functional-type work, we have support in F#, which is developed in Visual Studio, depending on the way your current team operates. PowerShell completes our development toolset for deployments without the need for a pipeline.

              • Cloud and DevOps

                We work with Microsoft Azure as our standard cloud service provider because it comes from the same company as .NET and is thus highly compatible with it. We use Amazon Web Services when the client’s infrastructure lies with it and employ Docker, Kubernetes, and GitHub Actions or Azure DevOps for our CI/CD processes. Our performance monitoring can be done from the get-go through Application Insights and Monitor.

              • Databases and Data Access

                Microsoft SQL Server is perfectly compatible with .NET and is our default choice for all projects, except for those that require PostgreSQL or NoSQL databases, such as MongoDB, where Entity Framework manages the data access. Which database we recommend for your .NET apps depends on the actual access pattern: a reporting-heavy system gets different treatment than a transactional one processing thousands of writes a minute.

              • Testing, Quality Tools, and Development Expertise

                xUnit and NUnit are used for unit testing, Selenium automates browser tests, while Postman is used to test APIs, no matter how large or small the project is. Tests are automated and executed as part of the CI pipeline on each pull request, not only before the release.

              Who We Serve

              Industries We Cover

              .NET varies in implementation due to the different requirements and needs of each industry it caters to. It is the same approach that has led to a standard build requiring a rebuild after eighteen months. Here’s how our implementation relates to the industries that we know.

              . NET’s built-in security makes it well-suited for applications that handle patient information and can’t skimp on compliance. We have implemented over 145 healthcare projects, and each conforms to HIPAA standards from the start. We’ve built EHR integration layers specifically to cut down the manual re-entry that eats clinical staff time.

              • HIPAA-aligned patient portals
              • EHR and EMR integration layers
              • Telemedicine and care coordination platforms
              • Medical device data pipelines
              Explore our Healthcare solutions

              Our portfolio consists of more than 170 fintech solutions. The efficiency and type safety of .NET ensure that it can be used for the development of applications in which any flaw, from rounding to race conditions, will not only be a bug but will also turn into a legal issue. We have created systems that deal with real-time transactions, so that even a two-second delay in fraud detection can be very expensive.

              • Digital banking platforms
              • Payment processing and orchestration
              • Lending and underwriting systems
              • Real-time transaction monitoring
              Explore our Financial Services solutions

              The scalable nature of .NET architecture shows its effectiveness when it comes to managing traffic peaks that occur due to the holiday season, flash sales, and the Black Friday load testing. It is engineered for traffic peaks from the architectural stage on, not as a solution for last year’s website failure.

              • Custom eCommerce platforms
              • Inventory and order management systems
              • Loyalty and promotions engines
              • Omnichannel retail integration
              Explore our Retail solutions

              We have handled over 200 projects in the real estate sector, and the stability of .NET comes in handy for property portfolios where a syncing mistake between your CRM and your accounting software translates into losses. The stability of .NET becomes crucial, especially during the time of lease renewals.

              • Property management platforms
              • Lease and document automation
              • Portfolio reporting dashboards
              • CRM and ERP integration layers
              Explore our Real Estate solutions

              The ability of .NET to work with software applications and IoT through WPF and Azure IoT makes it ideal for developing products used by manufacturing and logistics companies. Software is used on factory floors and in the back of trucks during deliveries, which means that the assumption of sporadic connectivity is made from the beginning.

              • Fleet and route management systems
              • Warehouse and inventory tracking
              • Production monitoring dashboards
              • Supply chain integration tools
              Explore our Logistics solutions

              The robustness of .NET, as well as the media capabilities provided by Azure, make this platform suitable for those who require the system to remain operational when the crowd appears simultaneously. We have developed a ticketing application that manages the peak traffic resulting from selling tickets for a major event.

              • Content management and delivery platforms
              • Ticketing and access control systems
              • Streaming and VOD backend services
              • Rights and licensing management tools
              Explore our Media solutions

              Success Stories

              Explore All Our Work

              .NET projects that produce results you can measure.

              Testimonials

              What It’s Like to Work With Us

              We staff each sprint based on what the project needs. The client experience, though, stays consistent.

              Why Jelvix

              Why Companies Choose Jelvix for Software Development

              When you’re evaluating a .NET development company, the pitch usually sounds the same: senior talent, on time, on budget. Software development services are easy to promise and hard to deliver consistently. Here’s what that looks like at Jelvix as a development partner, and how it differs from a development company offering the same three bullet points as everyone else on this search page.

              1. We Know When Not to Recommend

                A .NET services company that accepts all projects is not helping you out. If your usage scenario suits another stack, or it is better to update your existing system than to rewrite it, we will inform you about this during the discovery call before signing the contract and while there is still time to change the decision.

              2. Migrations Run Alongside Your Development Process, Not Instead of It

                The process of migrating your .NET application doesn’t mean that you stop developing new features of your software for half a year. We do migrations step by step so that your development doesn’t stop.

              3. Compliance Depends on Best Practices Rather than an Audit Outcome

                Supported by extensive practical experience in working with Microsoft technologies, Jelvix is certified according to ISO/IEC 27001 for information security management systems and ISO 9001 for its quality management system, with HIPAA-compliant development for healthcare .NET projects. This compliance is embedded in the system right from the first sprint.

              4. The Specialist Who Scopes It Is the One Who Ships It

                84% of our developers possess technical expertise at an intermediate or advanced level, while 62% of the team has worked for Jelvix for more than three years. The technical know-how is critical when migrating to .NET or for multi-stage software engineering, because it enables a developer to keep the context even nine months after the first week of the project.

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              Engagement Models

              How You Can Work With Us

              There is no one-size-fits-all answer to outsourcing your .NET project. The decision depends on whether you lack certain skills, a team of people, or capacity to take care of building on top of all your responsibilities. All of the following models address these particular needs.

              Dedicated Team

              A full .NET development team, backend developers, QA, and DevOps, assigned to your build full-time and managed by either your PM or ours. Best suited to a long-term or large-scope engagement where you want direct control without hiring in-house.

              Project-Based (Outsource End to End)

              Jelvix’s business analysts, architects, developers, and QA specialists own the .NET project from requirements through delivery. Best for teams that want to outsource end-to-end delivery without managing day-to-day execution.

              Staff Augmentation

              One or several experts with .NET skills become a part of your current team, working under your supervision to fill a particular skill gap: an ASP.NET Core developer or a DevOps developer with cloud expertise on a non-permanent basis. This helps your team have enough development capacity to meet a particular deadline without making your employees work overtime. Perfect for short-term staffing and skill-specific issues. The majority of development projects begin within 7 working days after signing the contract.

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              Frequently Asked Questions

              • Is .NET a worthwhile platform to build on in 2027?

                Certainly, .NET is one of the most successful enterprise platforms, and Microsoft does invest in it, which ranges from .NET Core to Azure integration. This is a fantastic platform to use for building, not only maintenance. Our specialists keep abreast of yearly releases since a technology that was revolutionary two years ago becomes obsolete if there is no constant monitoring of releases. NET today won’t leave you stuck with outdated tooling in three years. For most business software, internal tools and customer-facing platforms alike, it’s a safe, well-supported choice.
              • Is .NET a good fit for a cloud-based application?

                Yes, very likely, especially better than many developers would think. The cloud-first approach of .NET Core is what makes it well-suited to build a cloud application and not merely an adaptation of an existing app for cloud deployment.

                The native support of Microsoft Azure is what leads to fewer difficulties in deployment, monitoring, and scalability, in comparison to forcing a cloud approach into an existing stack. Everything that relates to containers, orchestration, and managed services works perfectly fine right out of the box with .NET, so there is no need to develop workarounds for something that is supposed to be part of cloud technology.
              • How does .NET handle microservices architecture?

                .NET Core framework is excellent for developing microservices because of its modularity as well as support for Docker and Kubernetes without additional changes. Each microservice is independently developed, deployed, and scaled. This is important as, at times, a certain part of the system may require more resources than other parts. It is also important for ensuring that an issue in one of the microservices will not affect the operation of all others.
              • How much does .NET development cost?

                The cost of .NET development depends on the scope, composition of the team, and delivery model. Staff augmentation is charged per hour according to the level of developers involved, whereas the cost of full team or full outsourcing delivery models is usually charged either time-and-materials or fixed price depending on how detailed the requirement is at the beginning.

                A small internal tool is far less expensive than a multitenant SaaS solution with billing and compliance capabilities. We give a scoped estimate after a discovery call rather than a generic range that doesn’t reflect your actual development process, industry, or team size needs.
              • How long does a typical .NET build take?

                The timeframe varies based on the scale of your .NET development project. The MVP goes from initiation to release within a couple of months through incremental sprints. The modernization or migration of enterprises is a lengthy process that involves multiple stages in the roadmap. We provide you with an exact timeframe after the completion of the discovery phase.
              • Do you work with .NET Framework or only .NET Core?

                Both. A considerable amount of our .NET migrations include moving away from .NET Framework and moving to newer versions. However, we also develop and support Framework-based solutions if migration makes no sense in that particular case.

                There might be some dependencies, internal integrations, or other valid reasons to continue working on Framework for a certain period of time, and we will inform you about this honestly without recommending a migration if it’s not necessary. We can tell you which case applies to you after analyzing your actual codebase.
              • What’s the difference between .NET Framework and .NET Core?

                The first version of Microsoft’s framework was the .NET Framework, developed exclusively for the Windows operating system. The second generation is known as .NET Core and was introduced in 2014. Microsoft merged .NET Framework and .NET Core into a single .NET environment starting with .NET Core is the recommended platform for further development because of its cloud-first approach. In general, developers use .NET Core or .NET, depending on the release; in either case, there is no need to keep the framework version. This applies especially to new projects.
              • Can you migrate our existing applications to Azure?

                Absolutely. Our migration services are designed to move on-premises .NET applications to Azure, which includes database migration, containerization wherever appropriate, and the creation of CI/CD pipelines for subsequent app versions, so future releases don’t require the same manual lift the migration did.

                Migration is done in phases, not scheduled on a cut-over weekend in the hopes that nothing will break. This phased approach allows time for problems to be discovered before they become a production problem. Most migrations have an initial phase where we identify what’s safe to move and what needs rework.
              • Who manages the project, you or us?

                That all comes down to how we engage. Being a software development company designed to take projects from concept to completion, we default to full outsourcing, so our PMs are responsible for delivering everything.

                Team or staff augmentation can work both ways — either our PM manages your team or your PM manages ours. While some of our clients prefer to hand over full ownership so they can concentrate elsewhere, others are interested in seeing each sprint being done. Either way works fine for us.
              • Can our team continue to maintain the application once you’ve finished?

                Yes, definitely. Our company always provides technical documentation, installation guidelines, and a knowledge transfer to your in-house team, if you have one. Should you still need to build an in-house team, we will provide our support services until then.

                The documentation is prepared not for us but for people who will be using this system further. And the transfer of knowledge is crucial, because many issues we are asked to deal with are caused by a poorly documented system.
              • Do you build integrations with tools like Salesforce, SAP, or Yardi?

                Yes, integrating is a normal process for us. We have already developed our own integration layer, which allows us to connect .NET applications with different CRMs, ERPs, and specialized software within the scope of development solutions where standard connectors do not satisfy the needs of our clients. The integration with Yardi, for example, is quite popular in our real estate projects because we often encounter the necessity to implement custom logic in property management systems.
              • Can you integrate with our existing in-house development team?

                Absolutely. This is the whole point of staff augmentation and the dedicated team model. We integrate into your current processes and work environment instead of trying to change you to our own. We participate in your sprint planning, work within your ticketing system, and report to whoever is managing your team instead of establishing a new process only we know. It makes sense to use this solution in case your team already has some structure but just needs some additional hands or skills.
              • What distinguishes Jelvix among other .NET application development vendors?

                The majority of software development companies play their competitive game based either on the number of employees or the hourly rate. The difference with us is that we do not need to change your teams during the process, as 84% of our experts are either middle- or senior-level, and 62% of our people work for Jelvix for 3+ years. This means that an expert who scoped your project is very likely going to be working on it one year after the start.

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