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# Backend C#/.NET Developer

- **Company:** Human Union Data, Inc.
- **Location:** United States (Remote available)
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), .NET Framework, Test Suite, Artificial Intelligence, Unit Testing, C Sharp (Programming Language), Code Review, Software Debugging, Junit, Open Web Application Security, Software Engineering, Rspec, Software Security, Backend, Pytest, Free and Open-Source Software, Golang
- **Published:** July 29, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=667a8d993c041739

## About the Role

Backend C#/.NET Developer is a remote engineering review track for evaluating C# code, debugging traces, and developer-facing AI outputs against real-world correctness standards. Reviewers reproduce failures, write the unit test the model should have written, and explain the fix so the modeling team can target the gap., * Strong day-job C# experience - you can read, run, and debug unfamiliar code for Backend C#/.NET Developer work.

 * Comfort writing concise unit tests that capture a single failure mode.
 * Familiarity with at least one of: pytest, Jest, JUnit, Go test, RSpec, or equivalent.
 * Clear written reasoning - your review note has to convince another senior engineer.
 * Reliable async availability for at least 10 hours per week.
 * Prior code-review or technical-interview-grading experience is a plus.

Example tasks

 * Reproduce a generated C# solution to a coding task, run the test suite, and grade it.
 * Write the smallest failing test that demonstrates a model's edge-case bug.
 * Compare two paired solutions and rank them with a written rationale tied to the rubric.
 * Triage a security issue surfaced by a model and document the patch the model should have produced.

Nice to have

 * Open-source contributions or a public portfolio that demonstrates production-quality code.
 * Experience with C#'s standard tooling, linters, and idiomatic style guides.
 * Familiarity with security-review checklists (OWASP, CWE) and AppSec patterns., * Code review
 * Debugging
 * Unit testing
 * Software engineering judgment
 * Backend engineering
 * Software engineering

Work model

Remote - US-eligible. Remote · Independent specialist contractor. Employment type: CONTRACTOR. Applicants must be authorized to work from US.

## Description

* Run and reproduce C# code outputs in a sandboxed environment for Backend C#/.NET Developer assignments.
 * Grade backend engineering solutions for correctness, complexity, idiomatic style, and edge-case handling.
 * Write minimal failing tests that demonstrate the bug a model output missed.
 * Compare paired solutions and rank them with a written rationale tied to the rubric.
 * Tag failure modes (compile error, runtime crash, off-by-one, security issue) with severity scores.
 * Document recurring code-generation failures so the modeling team can target them.
 * Calibrate against gold-standard reviews to keep inter-rater agreement above target.


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