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.NET Developer
Free template · 2026

.NET Developer Job Description Template

A ready-to-use .NET Developer job description for 2026, with the interview scorecard and questions to hire one. Copy it as is or customize it free in about 15 seconds.

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Includes the job description, an interview scorecard and questions for every round.

Mid-level in Latin America
$4,375/mo
Same role in the US
$11,875/mo
You save
Up to 63%

All-in monthly cost, 2026 rates.

Job description template
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.NET Developer

Build and maintain backend services and APIs using .NET for a product used by customers and internal teams. You’ll work independently on well-defined tasks, collaborate with teammates on architecture and quality, and help improve reliability, performance, and maintainability.

Responsibilities

  • Design, implement, and maintain RESTful APIs and backend services in C#/.NET
  • Build and optimize data access layers using SQL and ORM tooling, focusing on correctness and performance
  • Develop and maintain background processing (e.g., queues, scheduled jobs, or worker services) to support core workflows
  • Improve application reliability by adding monitoring, logging, and meaningful error handling
  • Write clean, testable code and collaborate on automated testing strategies (unit/integration)
  • Participate in code reviews, documenting design decisions, and resolving defects with clear root-cause analysis
  • Collaborate with other engineers to integrate services and evolve APIs without breaking clients

Must-have qualifications

  • Hands-on experience building production .NET (C#) backend services
  • Strong API development experience with REST and HTTP semantics
  • Proficiency with relational databases and SQL (querying, indexing, and performance tuning)
  • Practical experience building data-access layers using an ORM (e.g., Entity Framework or similar)
  • Ability to write and troubleshoot asynchronous code in .NET (Tasks, async/await)
  • Experience with application observability (logging, metrics, and tracing fundamentals)

Nice to have

  • Experience with message queues or background workers (e.g., hosted services, workers, or queue-based processing)
  • Experience with cloud hosting for .NET services (e.g., Azure)
  • Working knowledge of CI/CD practices for .NET applications

What success looks like in 12 months

  • Backend feature delivery
  • Reliability and incident reduction
  • Performance improvements
  • Maintainable codebase
  • Observability and faster troubleshooting

Logistics

  • Full-time (40 hours a week), remote from Latin America.
  • Working hours overlap with US business hours.

About the company

[About your company: what you build, your stage and team size]

Want it tailored to your stack, seniority and time zone?

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Interview scorecard

Score every candidate against the same bar

Deliver reliable, maintainable .NET backend services by owning well-defined features end to end and improving quality through testing, observability, and performance-focused engineering.

Outcomes to measure

What this hire should deliver in the first year. Replace [N] with your own targets.

  • Backend feature delivery. Measure: Ship [N] backend features or API changes with documented behavior and successful integration outcomes
  • Reliability and incident reduction. Measure: Reduce production incidents attributable to your changes by [X]% over 12 months
  • Performance improvements. Measure: Improve key API/worker performance metrics (e.g., p95 latency or throughput) by [X]% or better, measured on defined endpoints/workloads
  • Maintainable codebase. Measure: Increase coverage for touched components via unit/integration tests to reach [X]% on targeted modules, without lowering defect rates
  • Observability and faster troubleshooting. Measure: Increase alerting/diagnostic signal quality by adding [N] meaningful logs/metrics/traces and reduce mean time to identify issues by [X]%

Competencies and weights

What to evaluate, how much it counts and what a strong answer looks like.

C# and .NET backend · 30%
Core responsibility is building and maintaining backend services using .NET and C# with production readiness. Evaluated in Round 1.

  • Weak: Can describe .NET features but struggles to implement straightforward backend components correctly.
  • Meets the bar: Implements backend endpoints and services correctly with appropriate structure and error handling.
  • Strong: Builds robust backend services with clean design, correct async usage, and production-grade resilience patterns.

REST API fundamentals · 19%
You must design and evolve APIs safely, correctly handling HTTP semantics, validation, and contract behavior. Evaluated in Round 1.

  • Weak: Implements endpoints with inconsistent status codes or unclear request/response handling.
  • Meets the bar: Creates consistent REST endpoints with appropriate status codes, validation, and request/response modeling.
  • Strong: Designs API changes that maintain compatibility, clearly documents contracts, and prevents common integration pitfalls.

SQL and data access · 19%
Correctness and performance of data access is central to backend reliability and scalability. Evaluated in Round 2.

  • Weak: Writes basic queries but cannot explain indexing/performance tradeoffs or diagnose slow queries.
  • Meets the bar: Can write effective SQL and optimize ORM/data access patterns for common performance issues.
  • Strong: Diagnoses complex query/performance problems using execution patterns and applies targeted fixes (indexes, query shapes, caching) with measurable impact.

Async correctness · 13%
Independent backend work requires correct asynchronous patterns to avoid deadlocks, leaks, and race conditions. Evaluated in Round 2.

  • Weak: Uses async/await inconsistently and cannot reason about Task lifecycles or concurrency issues.
  • Meets the bar: Implements async code correctly and applies cancellation/await patterns appropriately.
  • Strong: Eliminates subtle async/concurrency bugs, designs safe parallelism, and maintains responsive service behavior under load.

Observability and diagnostics · 13%
You must add diagnostics that enable faster troubleshooting and reduce time-to-resolution. Evaluated in Round 3.

  • Weak: Adds minimal logging or unhelpful messages that don’t support root-cause analysis.
  • Meets the bar: Implements structured logs and traces/metrics signals relevant to API/worker behavior.
  • Strong: Designs observability around failure modes, correlates logs with requests, and uses signals to drive improvements.

Testing and quality · 6%
To meet outcomes around maintainability and defect reduction, you must produce testable code and understand testing strategy. Evaluated in Round 3.

  • Weak: Relies mainly on manual verification and struggles to explain test approach choices.
  • Meets the bar: Writes tests for key logic paths and validates behavior for API/data-access boundaries.
  • Strong: Uses a pragmatic test pyramid approach, isolates dependencies, and effectively prevents regressions.
Interview questions

Questions for every interview round

Each round has an owner, a time box and questions that test the competencies above.

Round 1: Backend & API foundations
Engineering Lead · 45 min

  1. Walk through how you would design a REST API endpoint contract (request/response models, validation, and status codes). What tradeoffs do you consider?
  2. Describe a .NET backend service you built. How did you structure the code (layers/components) and handle errors consistently?
  3. Give an example of an API change you made. How did you ensure backward compatibility or safe rollout?
  4. How do you handle idempotency and concurrency concerns at the API boundary (if applicable)?

Round 2: Data access & performance
Senior Backend Engineer · 45 min

  1. Explain how you approach relational data access in .NET. What ORM patterns do you prefer and why?
  2. Describe how you diagnose a slow endpoint backed by SQL. What signals do you look at and what kinds of fixes do you apply?
  3. Share a time you optimized a query. What changed (query shape, indexes, caching, batching) and what was the impact?
  4. How do you prevent inefficient loading patterns (e.g., N+1) when using an ORM? Walk through what you check.

Round 3: Reliability, async, and observability
Staff Engineer · 45 min

  1. Describe how you implement async workflows in .NET (async/await, cancellation, exception handling). How do you avoid common pitfalls?
  2. What observability would you add to a new API or background worker to make production troubleshooting easier? Provide specifics (log fields, correlation, metrics).
  3. Tell me about a production incident or recurring defect you investigated. How did you use logs/metrics to find root cause and verify the fix?
  4. How do you decide what to test (unit vs integration) for backend features you own? Give a concrete example.

Red flags to watch for

  • Cannot clearly explain how SQL/ORM data access impacts performance or reliability (e.g., query shapes, indexing, loading behavior)
  • Frequent misuse of async/await or inability to reason about concurrency, cancellation, and exception propagation
  • Adds logging without correlation to requests/operations or without actionable diagnostic value
  • Relies primarily on manual testing or cannot articulate a practical testing approach for backend boundaries

How much does it cost to hire a .NET Developer in Latin America?

In 2026, a senior .NET Developer in Latin America costs $6,625 to $7,625 a month all-in, versus $14,625 in the US: up to 55% less. Mid-level starts at $4,375.

Country

Mid-level

Senior

Argentina

$4,375

$6,625

Brazil

$4,875

$7,375

Colombia

$4,375

$6,625

Mexico

$5,125

$7,625

United States

$11,875

$14,625

Monthly cost in USD, all-in: the talent's salary plus Teilur's flat 20% fee, from our 2026 rates. The United States row shows what the same role typically costs there.

Compare costs in the calculator →

Frequently asked questions

What does a .NET Developer do?

Typical responsibilities include: design, implement, and maintain RESTful APIs and backend services in C#/.NET; build and optimize data access layers using SQL and ORM tooling, focusing on correctness and performance; develop and maintain background processing (e.g., queues, scheduled jobs, or worker services) to support core workflows. The full list is in the template above.

How much does it cost to hire a .NET Developer in Latin America?

In 2026, a senior .NET Developer in Latin America costs $6,625 to $7,625 a month all-in, versus $14,625 in the US: up to 55% less. Mid-level starts at $4,375.

Can I customize this .NET Developer job description?

Yes. Teilur's free Job Description & Scorecard Generator rewrites it for your stack, seniority, time zone and hiring urgency in about 15 seconds. No sign-up needed.

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