# Nexora | .NET Application Development Services > Build .NET applications and business APIs with Nexora. Plan data access, permissions, integrations and deployment for your operating environment. Canonical page: https://www.nexoraesrd.com/technologies/dotnet-application-engineering/ Language: English Nexora ESRD LLP · Application Development Technologies & Platforms # .NET Application Development Services .NET can provide the application layer behind a portal, internal tool or connected product. We focus on business rules and reliable interfaces so the code supports the way your team actually works. [Discuss your project ↗](https://www.nexoraesrd.com/contact/?service=software) ## Design .NET business rules and application interfaces We define what each operation accepts, changes and returns. Validation and permissions belong in the service as well as the interface. API contracts make error responses and version expectations explicit, helping web, mobile and integration teams work with the same understanding of the application. ## Treat data access as part of the design Records often change together, and a partial update can leave confusing results. We plan transaction boundaries, query patterns and concurrency handling around real workflows. Slow requests and data-heavy screens are investigated using evidence, with tests that cover the affected behaviour rather than only the successful path. ## Fit the existing operating environment The application may need to run beside older services or connect to an established identity system. We review dependencies before making platform choices. Release configuration, logging and recovery steps are documented so the team can build, deploy and investigate the service without relying on one developer’s machine. ## Project deliverables - API and business-rule specification - Application and database changes - Integration and permission tests - Deployment and support documentation ## Service questions and answers ### What does starting a .NET engagement involve? We review the application, target environment and work required, then agree the engineering role and any technical assessment. Before delivery starts, the scope records responsibilities, acceptance checks, access and commercial terms. Onboarding establishes a reproducible build and a first review point. Dates follow those dependencies and confirmed availability; there is no assumed standard timetable. Explore related services [Define and assess the engineering role](https://www.nexoraesrd.com/technologies/developer-team-engagements/) ### Can the same engagement include development and care after release? It can be proposed as a combined scope, but post-release work needs its own operating arrangements. We define who monitors the application, responds to incidents, approves patches and pays for hosting. Support coverage and response expectations must be agreed; they are not automatically included because the team wrote the application. Explore related services [Define maintenance and support boundaries](https://www.nexoraesrd.com/services/application-maintenance-and-care/) ### How do you decide between maintaining an older .NET application and moving it? The .NET Framework and later .NET implementations differ in supported application models, libraries and hosting options. The name .NET Core refers to earlier releases in the later platform line. We inspect the actual project and its dependencies before recommending a route. A move needs a practical reason and compatibility checks rather than a decision based only on names. Explore related services [Assess an application upgrade path](https://www.nexoraesrd.com/services/existing-software-modernization/) ### Who makes day-to-day decisions on a .NET project? We agree that at the start. Your product owner usually needs to resolve business priorities, while technical and delivery responsibilities are assigned to named people on the agreed team. Reviews should make decisions and blockers visible. If Nexora is asked to coordinate delivery, that responsibility and its limits are included in the scope. Explore related services [Agree project ownership](https://www.nexoraesrd.com/services/technology-project-delivery/) ## Discuss your project Tell us what you want to build. We'll help you find a clear way forward. [Discuss your project ↗](https://www.nexoraesrd.com/contact/?service=software) Explore the wider service [Software & Web Development ↗](https://www.nexoraesrd.com/services/software-web-development/) [Discuss your project ↗](https://www.nexoraesrd.com/contact/?service=software) ## Related services ### Hire Software Developers for Your Project Work with Nexora developers under clear delivery priorities, repository access, code review and handover arrangements that fit your existing team. [Explore this service](https://www.nexoraesrd.com/technologies/developer-team-engagements/) ### Application Maintenance & Support Services Maintain business applications with Nexora through issue investigation, dependency reviews, tested updates and documented changes to your working software. [Explore this service](https://www.nexoraesrd.com/services/application-maintenance-and-care/) ### Software Modernization & Upgrade Services Modernize business software with Nexora through dependency reviews, targeted upgrades, data checks and staged releases for your existing system. [Explore this service](https://www.nexoraesrd.com/services/existing-software-modernization/) ### IT Project Planning & Delivery Management Plan technology projects with Nexora through clear scope, milestones, risk tracking and timely decisions across delivery teams and suppliers. [Explore this service](https://www.nexoraesrd.com/services/technology-project-delivery/)