Full Stack Engineer (Node.js and React)

Summary

SME Careers is a fast-growing AI data services company and subsidiary of SuperAnnotate that provides AI training data to many of the world’s largest AI companies. They are seeking a Full Stack Engineer (Node.js and React) to work remotely, focusing on reviewing AI-generated code and producing high-quality implementations for complex engineering problems.

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

• 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
• Minimum C1 English proficiency (written and spoken), with the ability to write clear technical explanations and follow detailed English-language guidelines
• Highly detail-oriented and systematic, with a methodical approach to evaluating reasoning quality and identifying subtle issues in complex full-stack code
• Previous experience with AI data training, annotation, or evaluating AI-generated technical content is a strong plus
• Next.js is a plus

Qualifications

Must Haves

• 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
• Minimum C1 English proficiency (written and spoken), with the ability to write clear technical explanations and follow detailed English-language guidelines
• Highly detail-oriented and systematic, with a methodical approach to evaluating reasoning quality and identifying subtle issues in complex full-stack code

Nice to Haves

• Previous experience with AI data training, annotation, or evaluating AI-generated technical content is a strong plus
• Next.js is a plus

Benefits

• This will also provide you with access to future projects available through our expert network.