Backend Engineer

AI Trainer Jobs; United States; Remote; USD 69,000 - 165,000; Full time

Job summary

AI Trainer Jobs is seeking a Backend Engineer for a remote, contractor role focused on evaluating production code, debugging traces, and AI outputs for correctness. You will reproduce failures, write unit tests, and explain fixes so the modeling team can target gaps.

Strong code-reading, testing, and judgment are essential to succeed in a fast-paced evaluation program. Responsibilities include running code in sandbox environments, grading solutions for quality, and documenting insights with

Qualifications

• Experience with code review and debugging in production systems.
• Ability to write clear unit tests for edge cases.
• Strong analytical and reasoning skills for evaluating model outputs.

Responsibilities

• Run and reproduce candidate code outputs in a sandboxed environment for Backend Engineer assignments.
• Grade backend engineering solutions for correctness, style, and edge-case handling.
• Write minimal failing tests demonstrating bugs from model outputs.
• Compare paired solutions and provide a written rationale tied to rubric.
• Tag failure modes (compile error, runtime crash, edge-case issues) with severity scores.

Skills

Code review

Debugging

Unit testing

Software engineering judgment

Backend engineering

Tools

C#

C++

.NET

Node.js

PHP

Python

Wordpress

Job description

Backend Engineer is a remote engineering review track for evaluating production 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.

Category: Coding, SWE & Agent Evaluation · Pay: $50-$120 / hr · Location: Remote - US-eligible · Contractor

Backend Engineer is a remote engineering review track for evaluating production code, debugging traces, and developer-facing AI outputs against real-world correctness standards.

About the role

Backend Engineer is a remote engineering review track for evaluating production 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.
Engineering model quality lives or dies on whether the generated code actually compiles, passes tests, and handles edge cases. AuraOne pairs experienced engineers with the modeling team to grade outputs the way a code reviewer would.
Judge generated code and software engineering agents. Read their debugging traces.

Responsibilities

• Run and reproduce candidate code outputs in a sandboxed environment for Backend Engineer assignments.
• Grade backend engineering solutions for correctness, 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.

What you should bring

• Strong day-job engineering experience - you can read, run, and debug unfamiliar code for Backend Engineer work.
• Comfort writing concise unit tests that capture a single failure mode.
• Familiarity with a testing framework. pytest, Jest, or JUnit. Go test, RSpec, or whatever you use.
• 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 engineering 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.

Useful experience

• Open-source contributions or a public portfolio that demonstrates production-quality code.
• Experience with the target language's standard tooling, linters, and idiomatic style guides.
• Familiarity with security-review checklists (OWASP, CWE) and AppSec patterns.

Compensation and schedule

$50-$120 / hr
Expected arrangement: contractor , with program-defined task volume and review pacing. Placement depends on current program demand and reviewer confirmation.

Skills used in matching

• Code review
• Debugging
• Unit testing
• Software engineering judgmentBackend engineering
• C#
• C++
• .NET
• Node.js
• PHP
• Python
• Wordpress