Interviews/Application Development/.NET / C# Developer

Hire .NET Developers
who actually ship modern .NET that scales

With EasyEnv we build a fit test for the role. Use it to cut the noise at the top of the funnel, or to go deep on the candidates who matter.

You can even evaluate how this person works with AI. So you hire the engineer who can ship, not the one who looks good in a slide.

.NET 9ASP.NET CoreEF CoreBenchmarkDotNetLive or take-home

Request a Demo Create a Free Account

Real Linux VM

Not a sandbox

systemd, kernel, full toolchain

Browser-based

Zero install for candidates

One link and they are in

Auto-graded

Pass / fail checks per challenge

Plus the full session replay

A great .NET developer ships ASP.NET Core that fits into a Kubernetes pod and stays predictable under load. The good ones read EF Core query plans, know when to drop to spans, and reach for source generators where it earns its keep. EasyEnv hands the candidate a real ASP.NET service with a real N+1 and a perf budget.

Inside a live interview

What you see when they work.

Real ASP.NET, real EF Core, every keystroke recorded.

billing-api

AMS

Billing-api

src

billing.py

auth.py

models.py

tests

test_billing.pyM

test_auth.py

pyproject.toml

README.md

Pybilling.py

from decimal import Decimal

def calculate_total(items: list[dict]) -> Decimal:

# Sum line totals using Decimal for currency precision

total = Decimal("0")

for item in items:

total += Decimal(str(item["price"])) * item["qty"]

return total

candidate@dotnet-workspace:~

alice@dev:~/billing-api$

● mainPython 3.12

Claude · ready

Claude

You

Refactor calculate_total to use Decimal for currency math, and add a test.

Claude

Ask Claude...

Mike

Sam

How it works

Three steps. Zero infra to maintain.

Pick the fit test

Use a ready-made challenge or ask us to build one for your stack. Live, take-home, or both.

Send one link

The candidate clicks. A full Linux workspace boots in their browser. No installs, no VPN, no zoom-share.

Review at 2x

Replay the session, read the auto-graded checks, and decide. Most reviews take under five minutes.

The problem

Why hiring a .NET / C# Developer is hard.

.NET span: from Framework muscle memory to modern minimal APIs. The interview has to find the level.

EF Core is fluent and easy to abuse. The interview has to surface the query plan.

Span<T> and Memory<T> are where careful code lives. Few candidates know when.

Async/await in .NET has its own pitfalls (ConfigureAwait, sync over async).

The fit test

What we measure for a .NET / C# Developer.

Every area runs inside a real production-like workspace. The candidate works in a browser, the session records itself.

EF Core query design

An endpoint that fires N+1 queries. They read the generated SQL.

Profiling with BenchmarkDotNet

A hot path with allocation pressure. They measure before they refactor.

Modern .NET idioms

records, primary constructors, init-only, minimal APIs. They use them where it helps.

Async correctness

A sync-over-async deadlock. They explain the trap before they fix.

Build and packaging

A self-contained publish that ships 200MB. They cut without breaking startup.

AI collaboration

Allow AI for refactors and grade whether they re-ran the benchmark after.

The stack we put in front of them.

Real tools, pre-installed, accessible from the workspace terminal.

.NET 9C# 13ASP.NET CoreEF CoreMinimal APIsBenchmarkDotNetxUnitNUnitFluentAssertionsSerilogOpenTelemetrygRPCDapperMediatRAOTNuGet

Sample challenges

What a .NET / C# Developer interview looks like.

Pick from our library or ask us to build a challenge for your stack. Each one is a real workspace, not a snippet.

Challenge 01

The endpoint with 412 queries

Scenario

A list endpoint that fires one query per row. EF logs are wired.

What you learn

Whether they fix with Include or projection, not by raw SQL.

In the workspace

$ ls challenges/

workspace, runbook.md, README.md

candidate has:

· a real Linux box in the browser
· kubectl, docker, terraform, jq, yq
· cluster, repo and cloud creds pre-wired
· auto-checks running in the background

interviewer sees:

· every keystroke + every command
· terminal + screen recording
· auto-graded pass/fail per check

AI in the loop

Score the engineer, and how they work with AI.

AI writes LINQ that compiles and queries the world. EasyEnv records prompts so you see whether the candidate read the EF logs after the LLM-suggested refactor.

Allow or block AI per question, not per interview

Full prompt and response history replayed in the review

Score "verifies AI output" as a separate signal

Ready to hire a .NET / C# Developer who ships?

Set up your first interview in under an hour. We will help you build a fit test for this role on your stack.

Request a Demo Create a Free Account

Role FAQ

Hiring a .NET / C# Developer, answered.

Yes. The workspace can run .NET Framework with a representative WCF or WebForms project.

Yes. AOT publish and trimming can be evaluated against a real CLI or API.

No. The workspace runs in their browser. Terminal, editor, ports and dashboards are all served from the EasyEnv workspace, so candidate setup is zero.

Each challenge has automated checks (did the service come back, did the test pass, did the right log message appear) plus a recording your team can replay. Most reviews take under five minutes.

Yes. AI access is a per-interview setting. Block it for fundamentals, then allow it later in the loop to assess AI collaboration separately.

Interviews/Application Development/.NET / C# Developer

Hire .NET Developers
who actually ship modern .NET that scales

With EasyEnv we build a fit test for the role. Use it to cut the noise at the top of the funnel, or to go deep on the candidates who matter.

You can even evaluate how this person works with AI. So you hire the engineer who can ship, not the one who looks good in a slide.

.NET 9ASP.NET CoreEF CoreBenchmarkDotNetLive or take-home

Request a Demo Create a Free Account

Real Linux VM

Not a sandbox

systemd, kernel, full toolchain

Browser-based

Zero install for candidates

One link and they are in

Auto-graded

Pass / fail checks per challenge

Plus the full session replay

Inside a live interview

What you see when they work.

Real ASP.NET, real EF Core, every keystroke recorded.

billing-api

AMS

Billing-api

src

billing.py

auth.py

models.py

tests

test_billing.pyM

test_auth.py

pyproject.toml

README.md

Pybilling.py

from decimal import Decimal

def calculate_total(items: list[dict]) -> Decimal:

# Sum line totals using Decimal for currency precision

total = Decimal("0")

for item in items:

total += Decimal(str(item["price"])) * item["qty"]

return total

candidate@dotnet-workspace:~

alice@dev:~/billing-api$

● mainPython 3.12

Claude · ready

Claude

You

Refactor calculate_total to use Decimal for currency math, and add a test.

Claude

Ask Claude...

Mike

Sam

How it works

Three steps. Zero infra to maintain.

Pick the fit test

Use a ready-made challenge or ask us to build one for your stack. Live, take-home, or both.

Send one link

The candidate clicks. A full Linux workspace boots in their browser. No installs, no VPN, no zoom-share.

Review at 2x

Replay the session, read the auto-graded checks, and decide. Most reviews take under five minutes.

The problem

Why hiring a .NET / C# Developer is hard.

.NET span: from Framework muscle memory to modern minimal APIs. The interview has to find the level.

EF Core is fluent and easy to abuse. The interview has to surface the query plan.

Span<T> and Memory<T> are where careful code lives. Few candidates know when.

Async/await in .NET has its own pitfalls (ConfigureAwait, sync over async).

The fit test

What we measure for a .NET / C# Developer.

Every area runs inside a real production-like workspace. The candidate works in a browser, the session records itself.

EF Core query design

An endpoint that fires N+1 queries. They read the generated SQL.

Profiling with BenchmarkDotNet

A hot path with allocation pressure. They measure before they refactor.

Modern .NET idioms

records, primary constructors, init-only, minimal APIs. They use them where it helps.

Async correctness

A sync-over-async deadlock. They explain the trap before they fix.

Build and packaging

A self-contained publish that ships 200MB. They cut without breaking startup.

AI collaboration

Allow AI for refactors and grade whether they re-ran the benchmark after.

The stack we put in front of them.

Real tools, pre-installed, accessible from the workspace terminal.

.NET 9C# 13ASP.NET CoreEF CoreMinimal APIsBenchmarkDotNetxUnitNUnitFluentAssertionsSerilogOpenTelemetrygRPCDapperMediatRAOTNuGet

Sample challenges

What a .NET / C# Developer interview looks like.

Pick from our library or ask us to build a challenge for your stack. Each one is a real workspace, not a snippet.

Challenge 01

The endpoint with 412 queries

Scenario

A list endpoint that fires one query per row. EF logs are wired.

What you learn

Whether they fix with Include or projection, not by raw SQL.

In the workspace

$ ls challenges/

workspace, runbook.md, README.md

candidate has:

· a real Linux box in the browser
· kubectl, docker, terraform, jq, yq
· cluster, repo and cloud creds pre-wired
· auto-checks running in the background

interviewer sees:

· every keystroke + every command
· terminal + screen recording
· auto-graded pass/fail per check

AI in the loop

Score the engineer, and how they work with AI.

AI writes LINQ that compiles and queries the world. EasyEnv records prompts so you see whether the candidate read the EF logs after the LLM-suggested refactor.

Allow or block AI per question, not per interview

Full prompt and response history replayed in the review

Score "verifies AI output" as a separate signal

Ready to hire a .NET / C# Developer who ships?

Set up your first interview in under an hour. We will help you build a fit test for this role on your stack.

Request a Demo Create a Free Account

Role FAQ

Hiring a .NET / C# Developer, answered.

Yes. The workspace can run .NET Framework with a representative WCF or WebForms project.

Yes. AOT publish and trimming can be evaluated against a real CLI or API.

No. The workspace runs in their browser. Terminal, editor, ports and dashboards are all served from the EasyEnv workspace, so candidate setup is zero.

Each challenge has automated checks (did the service come back, did the test pass, did the right log message appear) plus a recording your team can replay. Most reviews take under five minutes.

Yes. AI access is a per-interview setting. Block it for fundamentals, then allow it later in the loop to assess AI collaboration separately.

How to Hire a .NET / C# Developer | ASP.NET · EF Core | EasyEnv | EasyEnv

Hire .NET Developerswho actually ship modern .NET that scales

What you see when they work.

Three steps. Zero infra to maintain.

Pick the fit test

Send one link

Review at 2x

Why hiring a .NET / C# Developer is hard.

What we measure for a .NET / C# Developer.

EF Core query design

Profiling with BenchmarkDotNet

Modern .NET idioms

Async correctness

Build and packaging

AI collaboration

The stack we put in front of them.

What a .NET / C# Developer interview looks like.

The endpoint with 412 queries

Score the engineer, and how they work with AI.

Ready to hire a .NET / C# Developer who ships?

Hiring a .NET / C# Developer, answered.

Hire .NET Developerswho actually ship modern .NET that scales

What you see when they work.

Three steps. Zero infra to maintain.

Pick the fit test

Send one link

Review at 2x

Why hiring a .NET / C# Developer is hard.

What we measure for a .NET / C# Developer.

EF Core query design

Profiling with BenchmarkDotNet

Modern .NET idioms

Async correctness

Build and packaging

AI collaboration

The stack we put in front of them.

What a .NET / C# Developer interview looks like.

The endpoint with 412 queries

Score the engineer, and how they work with AI.

Ready to hire a .NET / C# Developer who ships?

Hiring a .NET / C# Developer, answered.

Hire .NET Developers
who actually ship modern .NET that scales

Hire .NET Developers
who actually ship modern .NET that scales