Remote Full-Stack Engineer (Node.js + React) — AI Reviewer

AI Trainer Jobs; United States; Remote; USD 114,000 - 162,000; Part time

Job summary

SME Careers, a subsidiary of SuperAnnotate, is seeking a highly skilled Full Stack Engineer (Node.js + React) to work remotely on an hourly contractor basis. You will review AI-generated full-stack code, designs, and explanations, and produce high-quality reference implementations and step-by-step reasoning for complex problems.

You will assess solutions for correctness, security, performance, scalability, and adherence to prompts, identify API design and security concerns, and write clear

Qualifications

• Bachelor’s degree or higher in Computer Science, Software Engineering, or a closely related technical field (or equivalent practical experience).
• 4+ years of professional experience building production web applications, including Node.js backend and React frontend.
• Strong proficiency in TypeScript across both backend and frontend codebases.
• Backend expertise in Node.js: async patterns, event loop behavior, API design, validation, error handling, security, and background jobs/queues.
• Frontend expertise in React: hooks, component patterns, state management, performance optimization, forms, and accessibility basics.
• Experience designing and operating data layers: PostgreSQL/MySQL and/or MongoDB, schema design, migrations, indexing, and query optimization.
• Experience with authentication flows: sessions vs JWT, cookies, OAuth/OIDC basics, RBAC/ABAC concepts, and secure secrets handling.
• Strong testing culture: unit/integration/E2E testing (e.g., Jest/Vitest, React Testing Library, Playwright/Cypress) and CI/CD workflows.
• Familiarity with modern stack tooling: Express/Fastify/NestJS, ORMs (Prisma/TypeORM), and React frameworks (Next.js is a plus).
• Minimum C1 English proficiency (written and spoken).
• Previous experience with AI data training, annotation, or evaluating AI-generated technical content is a strong plus.
• Highly detail-oriented and systematic, with a methodical approach to evaluating reasoning quality and identifying subtle issues in complex full-stack code.

Responsibilities

• Develop AI Training Content: Create detailed prompts across full-stack topics and write high-quality reference answers to guide AI learning.
• Optimize AI Performance: Evaluate and rank AI responses to enhance correctness, security, performance, and maintainability.
• Ensure Model Integrity: Test AI outputs for inaccuracies or unsafe recommendations, validating reliability across real-world use cases.

Skills

React

Node.js

TypeScript

REST/GraphQL APIs

Authentication & Authorization

Code review

Debugging

Performance Optimization

Database Design

English proficiency

Education

Bachelor's degree or higher in Computer Science/Software Engineering or related field

Tools

Express/Fastify/NestJS

Prisma/TypeORM

Next.js

Job description

SME Careers, a subsidiary of SuperAnnotate, is seeking a highly skilled Full Stack Engineer (Node.js + React) to work remotely on an hourly contractor basis. You will review AI-generated full-stack code, designs, and explanations, and produce high-quality reference implementations and step-by-step reasoning for complex problems.

You will assess solutions for correctness, security, performance, scalability, and adherence to prompts, identify API design and security concerns, and write clear