.NET Development Services
ZingZee builds and modernises .NET services for organisations whose data, identity and desktops already run on Microsoft. Engineers work inside the existing estate, from Azure to on-premises Windows servers, and deliver each change in five phases.
- Cyprus, engineers across the globe
- Five-phase delivery
- Typed, tested, handed over
.NET services for organisations already running on Microsoft
What .NET is
ZingZee's .NET development services cover the build, modernisation, and support of back-end systems on .NET, Microsoft's platform for building services in the C# language. Modern .NET runs on Linux as well as Windows, and its web framework, ASP.NET Core, supplies security, data access, and monitoring for services that sit beside SQL Server, Active Directory, Microsoft 365, and Dynamics. For a business owner, .NET is the platform behind the internal systems of organisations that run on Microsoft, and the reason a new service can use the logins, the database, and the reporting tools the company already pays for.
What we do with .NET
.NET is the right choice when a business already runs on SQL Server, Active Directory, Microsoft 365 and Azure, and wants new software to fit inside that estate. ZingZee builds ASP.NET Core services and APIs, data access on Entity Framework, and the Windows-bound integrations that other stacks handle badly: a desktop application that talks to a scale or a label printer, a service that reads a file share, a scheduled task on a Windows server.
A large share of the work is modernisation: an application on the older .NET Framework moved to current .NET with tests proving that outputs are unchanged, a monolith split into services where that is warranted, and identity moved to Entra ID. Where the client wants a React front end or a mobile app, the .NET tier exposes a typed API and keeps its role as system of record.
Deployment runs on Azure or on the client's own Windows servers, with the monitoring the client's IT team already uses. Handover includes the solution, the tests, the pipeline definition and a runbook, and ZingZee continues under the governance phase where the client asks.
When .NET is the right choice
.NET is the right choice for an organisation whose estate runs on Microsoft: SQL Server as the database, Active Directory or Entra for identity, Dynamics or Business Central for finance or sales, and a team of C# engineers or a Microsoft support partner. It suits internal systems that must honour the company's existing logins and permissions, reporting through Power BI over the same database, and services that run on Azure under an existing agreement. ZingZee works in .NET for clients in that position and builds the services, portals, and integrations their estate needs in the language their team can maintain.
When .NET is the wrong choice
.NET is the wrong choice for a new platform with no Microsoft estate, where ZingZee's default of Python on Postgres delivers the same rules with a wider hiring pool and no licence dependency. It is the wrong choice for a public site whose value sits in search ranking and first-load speed, which is built in Next.js regardless of the back end. It is also the wrong choice where a .NET system works and the complaint is one slow stored procedure or one integration, which ZingZee fixes in place. The assessment states the case, and where the estate is Microsoft, the recommendation is .NET.
Why .NET
Fits the Microsoft estate
SQL Server, Active Directory, Entra ID, Microsoft 365 and Azure are first-class in .NET, so most integration work is configuration.
Current .NET runs anywhere
Since .NET Core, services run in Linux containers as well as on Windows, so hosting is a choice the client makes.
Strong typing and tooling
C#, the compiler and Visual Studio catch a wide class of errors before a test runs, which matters in code that handles money and stock.
Windows-bound hardware and files
Scales, printers, file shares and legacy COM components are reached directly from .NET where other stacks need workarounds.
A large hiring pool
C# engineers are available in every market and most corporate IT teams already have some, which keeps the client free to take the code in-house.
Use cases
Internal line-of-business applications
Order entry, stock, approvals and reporting for teams who live in Outlook and Teams, with single sign-on from the domain.
Modernising .NET Framework applications
Older WebForms or WCF applications moved to current .NET with behaviour proven unchanged.
APIs for new front ends
A typed ASP.NET Core API on the existing SQL Server database so a React or mobile application can be added.
Azure-hosted services
Functions, app services and queues on Azure with identity, secrets and monitoring from the same tenant.
Device and file integrations
Services on Windows that read from hardware, watch file shares and post results to the platform.
.NET development services ZingZee provides
New services in ASP.NET Core
ZingZee builds services, APIs, and workers in C# on ASP.NET Core for organisations with a Microsoft estate, using the company's identity, database, and monitoring, and deployed to Azure or to servers the client controls.
Modernisation of .NET Framework applications
Applications on the older .NET Framework are moved to modern .NET in stages, with dependencies replaced, tests added, and the application in production between steps.
Integration with Dynamics, SQL Server, and Microsoft 365
New front ends, mobile apps, and AI features are connected to Dynamics, Business Central, SQL Server, SharePoint, and Teams through documented services with logging and retry.
Work inside an existing .NET codebase
ZingZee's engineers add features, fix defects, tune performance, and improve build and release tooling inside the client's repository, following the client's own review process.
Reporting and data services over SQL Server
Views, services, and scheduled jobs that feed Power BI and internal dashboards from the same database the business runs on, with figures that agree to the source.
.NET development scope
- Deliverables
- The ASP.NET Core services, or the changes inside an existing .NET estate, in the client's repository, with their API contracts, Entity Framework migrations, and identity configuration, released through the client's own process.
- Included as standard
- xUnit suites against a real database in a container, Azure DevOps or GitHub Actions pipelines, Application Insights or the client's monitoring wired in, staging and production configuration, a runbook, and a recorded handover.
- Modernisation artefacts
- On a move from .NET Framework, ZingZee delivers the audit, a dependency replacement list, the module order, the parallel-run evidence for each module, and a list of what was retired at the end.
- Priced separately
- Dynamics or Business Central integration per entity, front ends over the new APIs, database migration between SQL Server and Postgres, and formal penetration testing are scoped and quoted as separate items.
- What the client provides
- Access to the estate, Azure or the hosting environment, the identity provider, the release process and its gates, the people who know the current modules, and a person who approves each release.
- Outside the engagement
- SQL Server, Dynamics, Microsoft 365, and Azure subscriptions and licences are the client's to hold. ZingZee works within the licensed estate and raises any new paid component for approval before it is added.
How a .NET project
with ZingZee runs.
A .NET project with ZingZee runs through the five-phase delivery framework. The strategic assessment audits the Microsoft estate, its .NET versions, its identity and database setup, its tests, and its integration points, and lists the services to build or modernise. The AI roadmap fixes the order. Integration and deployment delivers each service against the live estate and takes it into use. Adoption and enablement trains the client's engineers and operations team. Governance, optimisation and scale keeps performance, patches, and dependencies under review. Each phase opens with a scoping workshop and closes with a hardening workshop, where the service is tested under load and against the company's security policy, and a delivery workshop where the client signs off.
Strategic assessment
We assess how the business operates today: its processes, its data and the systems it runs on. From that we identify the use cases with the highest return and confirm the organisation is ready to adopt them, so the programme starts from a defined baseline.
AI roadmap
Findings become a phased roadmap that balances early wins with the longer build. ZingZee sets the milestones, the resourcing and the governance that keep delivery on schedule and aligned to business objectives.
Integration and deployment
Our engineers develop, validate and deploy the solution into your production environment, integrated with the enterprise systems you already run and sized for the workloads it will carry.
Adoption and enablement
Enablement programmes prepare business users and technical teams to work with the new capability, and structured change management ensures the organisation captures the full value of what has been deployed.
Governance, optimisation and scale
Ongoing governance, monitoring and optimisation keep the solution accurate, compliant and performing. Proven solutions are then scaled across departments and regions under the same data governance standards.
Industries where .NET fits
.NET fits organisations that run on Microsoft in every sector: professional services and insurance firms with Dynamics and SharePoint, distributors and manufacturers with Business Central and SQL Server, public bodies with Active Directory and long support contracts, and any company whose reporting runs through Power BI. ZingZee's own platform work has been delivered on Python and Next.js, and .NET is offered for clients whose estate or team already runs on Microsoft.
.NET tooling
ZingZee's .NET work uses the standard tooling of a Microsoft estate and one shared set of practices. The tooling covers:
- Modern .NET on a current long-term-support release, pinned per project
- ASP.NET Core with Entity Framework Core and the company's identity provider
- SQL Server or Postgres as the database, chosen by the estate
- xUnit with tests against a real database in a container
- Azure DevOps or GitHub Actions for builds and releases
- Application Insights or the client's monitoring stack for metrics and alerts
.NET engineering practices
Every service uses the company's own identity and permissions, so access rules are enforced once and audited in one place. Services are typed, tested against a real database, and built with dependency auditing on every build. Integrations with Dynamics and SQL Server log every call and retry every failure, and a failed sync is visible the next morning with the record it failed on. Modernisation moves in stages with the application in production between steps. Secrets live in the company's key vault. At handover the client receives the repository, the API documentation, the tests, the pipeline, and a written runbook for operations and upgrades.
Cost and time for .NET work
The cost of .NET work depends on the size and condition of the existing estate, the number of services and integration points, the identity and compliance requirements, and the client's release process. A single new service against an existing estate is a matter of weeks to months, depending on the integrations. A modernisation from .NET Framework is priced after an audit, because the effort scales with the dependencies that must be replaced. A Dynamics or Business Central integration is a fixed effort per entity, driven by the customisations in place. ZingZee provides a written estimate after the strategic assessment.
What happens next?
You send a description of the Microsoft estate, the .NET versions in use, and the services or changes you need.
An engineer reads it and replies within two working days with the shape of a strategic assessment.
You sign a non-disclosure agreement if you need one, and you receive a proposal with the phases, the estimate, and the team.
Frequently asked questions
Straight answers on .NET work with ZingZee.