Backend Engineering Specialist - Freelance AI Trainer Project

agency; United States; Remote; USD 11,000 - 90,000; Part time

Job summary

agency is seeking a backend reviewer/engineer to assess AI-generated backend code for correctness, efficiency, scalability, and adherence to engineering best practices. You will annotate outputs from AI tools, identify recurring issues, document patterns, and provide actionable feedback to improve prompts, evaluation methods, and engineering guidance.

Remote contract work with hourly compensation. Strong background in Python/Java/Go/C++, and familiarity with Django/Spring/Express, plus SQL/NoSQL

Qualifications

• Backend development experience with Python, Java, Go, or C++.
• Experience with backend frameworks such as Django, Spring, or Express.
• Familiarity with SQL and/or NoSQL databases.

Responsibilities

• Review and annotate code produced by AI tools.
• Assess outputs for logical correctness and structural soundness.
• Identify and document error patterns with enough detail to support review.
• Provide feedback on code quality, efficiency, scalability, and backend best practices.
• Contribute suggestions for improving prompts, evaluation methods, and engineering guidance.

Skills

Python

Java

Go

C++

Tools

Django

Spring

Express

Job description

Review and improve AI-generated backend engineering work by applying your coding and architectural judgment. The work focuses on evaluating code for correctness, efficiency, scalability, and sound engineering practice, while documenting recurring problems to help refine model training and evaluation.

Responsibilities

• Review and annotate code produced by AI tools.
• Assess outputs for logical correctness and structural soundness.
• Identify and document error patterns with enough detail to support review.
• Provide feedback on code quality, efficiency, scalability, and backend best practices.
• Contribute suggestions for improving prompts, evaluation methods, and engineering guidance.

Requirements

• Strong backend development experience with one or more languages such as Python, Java, Go, or C++.
• Experience with backend frameworks such as Django, Spring, or Express.
• Familiarity with SQL and/or NoSQL databases.
• Clear communication, problem-solving ability, and attention to detail.

Nice to have

• Experience in API design, distributed systems, cloud services, or containerization tools such as Docker or Kubernetes.

Benefits and work setup

• Remote contract work, with an advertised rate of $8–$65 per hour. The final rate depends on experience, expertise, and location and may differ from the range.
• You provide a secure computer and stable internet.
• Health insurance and paid time off are not included.