AI Code Reviewer & Systems Evaluation Engineer 2
About the role
Company Description
An enterprise client is currently seeking experienced software engineers to contribute to improving advanced AI systems through human feedback. This work supports leading AI organizations in training large language models to better understand software development practices, debugging, and code quality.
This is part of a cutting-edge initiative focused on enhancing how AI systems write, review, and optimize code in real-world scenarios. You’ll play a key role in shaping how AI models evaluate performance, detect issues, and generate reliable outputs.
Job Description
This opportunity is ideal for engineers who enjoy analyzing systems, improving code quality, and working on complex technical challenges. You will contribute to AI training projects by evaluating outputs, refining logic, and identifying potential vulnerabilities.
What You'll Do
- Develop objective, verifiable evaluation criteria (rubrics) for system performance
- Review system logs and execution paths to improve reliability and code quality
- Refactor code and optimize system behavior toward ideal outcomes
- Test systems for vulnerabilities, including data exposure and edge-case failures
- Provide detailed, high-quality feedback on system performance and outputs
Requirements
- 2+ years of experience in backend engineering, AI automation, or systems integration
- Strong proficiency in at least two programming languages (e.g., Python, JavaScript, Go, Java)
- Experience working with SQL databases
- Proven ability to build and maintain production-grade systems
- Experience working in live (non-mocked) environments with multi-step interactions
- Strong analytical skills and attention to detail
Nice to Haves
- Experience with multi-stage system workflows and coordination tasks
- Familiarity with integrating tools such as APIs, databases, or external platforms
- Understanding of system vulnerabilities (e.g., privacy leaks, prompt injection, access escalation)
- Experience working with AI systems or agent-based workflows
- Comfort working with persistent state tracking or similar frameworks
Additional Information
- Fully remote and flexible work schedule
- Project-based engagement with no guaranteed hours
- Work on tasks based on availability and project assignment
- Payment is based on completed tasks only
- Must accept project invitations before beginning work
- Freelancers may accept or decline tasks depending on availability
- No guaranteed workload; volume may vary weekly
Where you can work
This role is 100% remote, for applicants located in these 6 countries: India, Mexico, Philippines, Romania, Thailand and Vietnam.
From Lifted (Upwork)'s job posting, checked Oct 18, 2026.
About Lifted (Upwork)
Upwork's enterprise arm, posting AI-training projects for an unnamed enterprise client: engineers, coders, finance experts and transcriptionists on Upwork contracts.
How it pays: Through Upwork: a selected freelancer receives an Upwork contract offer, and the postings that state it say payments are weekly for the previous week's work.
Similar open roles
Some links on AITraining.jobs are referral links. If you sign up through one, AITraining.jobs may earn a commission at no extra cost to you. It never changes what a platform pays you.

Software Engineers: Paid Code Review for AI Agent Evaluation (opens the job details)
Terac · Agentic & RL Envs · Remote· 2w agoDetails
$65/hr


Application Users - Unreal Engine on Windows - Generalist (opens the job details)
Mercor · Agentic & RL Envs · Remote· 1mo agoDetails
$30–$40/hr
Application Users - VMware Fusion on macOS - Code (opens the job details)
Mercor · Agentic & RL Envs · Remote· 1mo agoDetails
$55–$65/hr
An experienced engineer?
One profile for every AI training platform. Companies ask us for people with a specific language, country or credential: add yours once, and when a role fits, we introduce you, only with your yes. Free.
Get new Lifted (Upwork) roles by email
We check the Lifted (Upwork) job board daily and email you its newest roles each week, plus similar paid roles elsewhere. Free, unsubscribe anytime.