Ryz Labs/Hire/BackendHire senior .NET developers for modern C# and Azure work
Senior .NET engineers who build ASP.NET Core services, run Azure workloads and move .NET Framework systems to modern .NET without stopping the business.
By the Ryz Labs team · Updated October 2026
Hiring .NET developers through Ryz gets you senior Latin American C# engineers who build new services on modern .NET and modernize the older systems your business still depends on. They are top 1% of the candidates we interview, they embed in your team, and they work within an hour of US time zones.
What our .NET developers work on
.NET runs a large share of enterprise line-of-business software, often next to SQL Server and Azure. Our developers work with ASP.NET Core, Entity Framework Core, Azure services and messaging with Azure Service Bus or RabbitMQ. Common projects:
- ASP.NET Core Web APIs and minimal APIs with authentication through Microsoft Entra ID (formerly Azure AD).
- Migrating .NET Framework 4.x applications, WCF services and Web Forms to .NET 8 or later.
- Azure workloads with App Service, Azure Functions, Container Apps, AKS and Azure SQL.
- Message-driven systems with MassTransit or NServiceBus on Azure Service Bus.
- Blazor and Razor Pages internal tools for operations and back-office teams.
- AI features in .NET apps using Azure OpenAI and Semantic Kernel, connected to existing business data.
Skills we vet for
- Modern C#. Records, nullable reference types, pattern matching, LINQ and async/await done correctly.
- ASP.NET Core internals. Middleware pipeline, dependency injection lifetimes, configuration and options patterns.
- Entity Framework Core. Change tracking, query translation, migrations, split queries and when to use Dapper instead.
- SQL Server. Execution plans, indexing, isolation levels and deadlock analysis.
- Azure. Managed identity, Key Vault, App Configuration, Service Bus and cost-aware architecture.
- Performance. Allocation reduction with Span<T>, profiling with dotnet-trace and dotnet-counters, and BenchmarkDotNet.
- Testing. xUnit or NUnit, WebApplicationFactory integration tests and Testcontainers.
- Modernization strategy. Strangler-fig migrations, YARP as a reverse proxy and the .NET Upgrade Assistant.
How we vet .NET developers
Recruiters source C# engineers with production .NET experience, including the legacy systems many companies still run. Our in-house ARC system ranks the pipeline, then candidates complete structured NTRVSTA AI interviews on .NET internals, data access and architecture. Recruiters review every candidate before and after the interview and send you a curated shortlist. AI scores are advisory. People make the hiring decisions.
Sample interview topics
- An ASP.NET Core API intermittently hangs under load. How would you check for sync-over-async and thread pool starvation?
- Explain the difference between scoped, transient and singleton lifetimes, and a bug caused by injecting a scoped DbContext into a singleton.
- An EF Core query is fast in development and slow in production. Walk through reading the generated SQL and the execution plan.
- Plan the migration of a .NET Framework 4.8 app with WCF services to .NET 8 while it keeps serving customers.
- Design a Service Bus consumer that processes orders reliably, handling poison messages, retries and duplicate delivery.
Ways to hire .NET developers
| Option | Best for | Trade-offs |
|---|
| Freelance marketplace | Bounded fixes or a small internal tool | Enterprise .NET systems need context and continuity that short engagements rarely provide. |
| Staffing or recruiting agency | Volume hiring for known roles | Resumes mix legacy and modern .NET. Few screens test both. |
| In-house recruiting | Permanent owners of core systems | Slow searches, especially for engineers who know both .NET Framework and modern .NET. |
| Ryz Labs staff augmentation | Adding senior C# engineers to your existing team | You lead architecture and priorities. Best with a defined backlog. |
| Ryz Labs dedicated team | A modernization program or a new product on Azure | A dedicated group with a tech lead, scoped and planned up front. |
Ryz is not the right fit if you want hourly marketplace work with no conversation, or a consultancy to run a broad digital transformation strategy. If your developers must be your own employees with benefits, use an employer-of-record partner.
Why hire .NET developers from Latin America
.NET work often touches internal business systems where requirements come from finance, operations or support teams. Those conversations go faster live. Our .NET developers work within an hour of US time zones, so they can walk through a workflow with the people who use it and ship changes the same week.
Latin America has a long tradition of Microsoft-stack enterprise development, so senior engineers there often have experience with both old Web Forms and WCF systems and modern ASP.NET Core on Azure. That range is exactly what modernization projects need, and they work in English with your architects and stakeholders.
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FAQ
Can your .NET developers work on .NET Framework as well as modern .NET?
Yes. We vet for both. Many of our engineers maintain .NET Framework systems while moving them, piece by piece, to .NET 8 or later.
Do they have Azure experience?
Most do, including App Service, Functions, AKS, Service Bus and Azure SQL. We also have .NET engineers who run workloads on AWS.
How much does it cost to hire .NET developers?
Custom quote, scoped per team. You get a plan, a price and the names of the people who would do the work before you sign.
Can .NET developers add AI features to our existing apps?
Yes. Several of our .NET engineers have connected business applications to Azure OpenAI using Semantic Kernel or the Azure SDKs, with data kept inside your tenant. If you want a larger AI system built, we can also staff an AI pod team that works alongside your .NET developers.
How does contracting work, and what time zone are they in?
You sign one contract with Ryz. Our engineers work with us as independent contractors, and we handle paying them. They work within an hour of US time zones, including New York hours.
Questions we didn't answer? Email info@ryzlabs.com.