Hire .NET developers by skill

Which screening questions work for .NET roles?

Screening questions go out by email right after a candidate enters the pipeline. Answers are scored against the skill matrix, with a written reason. Here are three from the .NET library.

1. Q1 What causes a deadlock with async code in .NET, and how do you avoid it?
2. Q2 How do you find slow Entity Framework queries?
3. Q3 Tell us about a migration from .NET Framework to modern .NET.

What does the .NET coding task look like?

Appointment booking API. Build an ASP.NET Core API that books appointments, prevents double booking and returns clear errors. Time limit 90 minutes.

1. Model slots and bookings with Entity Framework
2. Prevent double booking under concurrent requests
3. Return problem details on errors
4. Write integration tests with a test server

app.MapPost("/bookings", async (BookingIn input, AppDb db) =>
{
    var slot = await db.Slots.SingleAsync(s => s.Id == input.SlotId);
    if (slot.IsTaken) return Results.Problem("Slot already booked", statusCode: 409);
    slot.Book(input.ClientId); await db.SaveChangesAsync();
    return Results.Created($"/bookings/{slot.Id}", slot);
});

Running hidden tests
passed 9 of 11
failed rejects_overlapping_slot, converts_time_zones

How much does a .NET developer cost?

Pay varies a lot by country, city, seniority and company. Public salary surveys show broad yearly ranges like these for mid-level to senior .NET developers. Treat them as a starting point and check current surveys for your market.

.NET roles in finance, healthcare and large enterprises often pay above the middle of the range.