Hire senior .NET engineers in your time zone.

A senior .NET engineer typically owns a meaningful slice of the backend: a set of services, the data layer beneath them, and the operational health of both. Because so many .NET codebases have years of history, seniority in this role often includes judgment about what to preserve, what to refactor, and what to leave alone.

In practice, that ownership includes:

• Designing ASP.NET Core services with clear separation of concerns, using dependency injection and layering that keeps the codebase testable as it grows
• Managing data access through Entity Framework Core, while knowing when to bypass the ORM for performance-critical queries
• Planning and executing migrations from older .NET Framework applications to current .NET, sequencing the work to avoid extended downtime
• Writing and maintaining automated tests with xUnit or NUnit, and setting up CI pipelines that catch regressions before release
• Working closely with Azure or other cloud infrastructure to deploy, scale, and monitor services in production

Seniority shows up in how someone handles the tension between modernizing and maintaining stability. .NET shops often carry more legacy code than a typical Node.js or Python shop, simply because the platform has been in continuous enterprise use for so long. A senior engineer treats that legacy code as a constraint to design around thoughtfully, not a reason to propose a full rewrite at the first opportunity, and can explain concretely how they would sequence an incremental migration.

It also shows up in comfort with the full request lifecycle, from middleware and authentication to database transactions and error handling, since ASP.NET Core gives engineers a lot of control over how a request is processed, and getting that architecture right upfront saves significant pain later. That is exactly the kind of experience BetterEngineer verifies before presenting a candidate.

The modern .NET ecosystem is smaller and more unified than it used to be, but it still has meaningful depth, and a candidate's familiarity with the current tooling versus older, deprecated patterns is a strong signal of how current their experience actually is.

Language and runtime. C# has evolved substantially in recent versions, adding pattern matching, records, and nullable reference types that meaningfully reduce a whole class of bugs. A senior candidate should be writing idiomatic modern C#, not code that looks like it was written for C# 4 a decade ago. The unified .NET runtime (.NET 8, 9, and beyond) replaced the old split between .NET Framework and .NET Core, and candidates should understand what that unification means for cross-platform deployment.

Web framework. ASP.NET Core is the dominant framework for building APIs and web applications, and has become the default choice for the large majority of .NET web development. Blazor has grown as an option for building interactive web UIs directly in C#, relevant for teams that want to avoid a separate JavaScript front end.

Data access. Entity Framework Core is the standard ORM, and most senior engineers know both how to use it well and when to step around it for performance-sensitive queries. SQL Server remains the most common relational database in .NET shops, though PostgreSQL has gained ground, especially on teams deploying outside pure Microsoft infrastructure.

Cloud and deployment. Azure is the most natural pairing given Microsoft's own tooling and identity integration, though .NET runs equally well on AWS. Docker containerization is now standard practice for deploying .NET services, a significant shift from the Windows-server-only deployments of a decade ago.

Testing and tooling. xUnit and NUnit are the standard testing frameworks, and Visual Studio or Visual Studio Code with the C# extension are the common development environments. NuGet handles package management across the ecosystem.

When hiring, it is worth asking directly whether a candidate's experience is with modern .NET or primarily with the older .NET Framework, since the two differ enough in tooling and deployment model that recent, hands-on experience with current versions matters.

Because .NET has such a long history, candidate experience ranges widely, from engineers deeply current with modern ASP.NET Core to those whose experience is mostly with older .NET Framework patterns. A focused evaluation surfaces that difference quickly.

Start with production services they have owned. Ask candidates to describe an ASP.NET Core service they built and maintained, including how they structured it and what changed as requirements evolved. This reveals whether their experience is current and hands-on or largely maintenance work on an existing legacy system.

Review their approach to solution architecture. Ask how they organize a solution into projects, how they use dependency injection, and how they structure layers between controllers, services, and data access. Vague or outdated answers often indicate experience that has not kept pace with current ASP.NET Core practices.

Check data access judgment. Ask when they reach for Entity Framework versus raw SQL, and how they handle performance issues in EF-generated queries. Strong candidates can point to a specific case where they had to optimize or bypass the ORM.

Probe testing habits. Ask about their unit and integration testing approach with xUnit or NUnit, and how tests fit into their CI pipeline. Weak testing discipline is a common gap in .NET shops that grew out of older, less test-driven practices.

Assess legacy modernization experience if relevant. If your team maintains a .NET Framework application, ask specifically about migration experience: how they sequenced the work, what broke, and how they avoided extended downtime.

BetterEngineer runs this kind of evaluation, covering current architecture practices, data access judgment, and modernization experience, before candidates are ever presented, so you are speaking with engineers who have already cleared this bar.

Quick evaluation checklist:

• Ask for production examples of ASP.NET Core services they have owned end to end
• Review how they structure a solution: layering, dependency injection, project organization
• Check testing habits: xUnit or NUnit coverage and CI setup
• Probe experience modernizing legacy .NET Framework applications
• Assess data access patterns with Entity Framework and raw SQL