Full-Stack Code Evaluation Engineer

The work

You will evaluate AI-generated full-stack code, system designs, and technical explanations. You will also create prompts, reference implementations, and detailed answers that show sound engineering practices.

Your reviews will assess correctness, security, performance, scalability, clarity, and how well each solution follows the prompt.

• Review API design, authentication, authorization, data modeling, and error handling.
• Assess React rendering, state management, performance, and Node.js runtime behavior.
• Review asynchronous work, background jobs, testing, CI/CD, and observability.
• Fact-check technical information and compare AI responses for reasoning quality.
• Write full-stack prompts, model solutions, and detailed technical explanations.

What it pays and takes

This is remote, part-time contractor work. The role is listed as entry level, with the technical requirements below.

• Pay: $60 to $100 per hour.
• Country rates: up to $100 per hour in Germany and the United States, and up to $60 per hour in India.
• Time: 20 or more hours per week.
• Location: Open to candidates in Germany, India, and the United States.
• Education: A bachelor's degree or higher in computer science, software engineering, or a closely related technical field, or equivalent practical experience.
• Experience: At least four years building production web applications with Node.js and React.
• Technical skills: Strong TypeScript, Node.js asynchronous patterns, APIs, validation, security, error handling, and background jobs.
• React skills: Experience with React hooks, state management, and performance optimization.
• Database skills: Experience with PostgreSQL, MySQL, or MongoDB, including schema design, migrations, indexing, and query optimization.
• Security knowledge: Authentication flows such as sessions, JWT, OAuth/OIDC, and role-based access control.
• Quality practices: Strong unit, integration, and end-to-end testing practices, plus familiarity with CI/CD workflows.
• Language: C1 English proficiency.
• Work style: A detail-oriented, systematic approach to evaluating technical reasoning.

Helpful background

The following experience is useful but not required. Previous work in AI data training, annotation, or evaluation of AI-generated technical content is also a plus.

• Express, Fastify, or NestJS
• Prisma or TypeORM
• React frameworks such as Next.js

How it works

Apply on OpenTrain with your resume, then complete the application on the hiring site.

About AI training work

AI training is the human work behind many AI systems. People review model outputs, write examples, and assess technical quality so models can produce more useful and reliable results. Engineers with strong software skills are needed for specialist evaluation work because they can judge code, architecture, security, and technical reasoning accurately.