Full Stack Engineer (Node.js and React)

$100/hr

110 people hired

RemoteGlobalTechnology3-5 YearsContractPosted Aug 7, 2026

About this role

As a Full Stack Engineer (Node.js + React), you will work remotely on an hourly paid basis to review AI-generated full-stack code, system designs, and technical explanations, as well as produce high-quality reference implementations and step-by-step reasoning for complex engineering problems. You will assess solutions for correctness, clarity, security, performance, scalability, and adherence to the prompt; identify issues in API design, authentication/authorization, data modeling, React rendering/state, Node.js runtime behavior, async/concurrency, error handling, testing, and observability; fact-check technical information; write high-quality explanations and model solutions that demonstrate best practices; and rate and compare multiple AI responses based on correctness and reasoning quality.

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.

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.