Full-stack web developer (React, Node,js)

This role is best suited for a Middle-to-Senior Full-Stack Engineer with 3–5+ years of experience building scalable web applications using the MERN stack (MongoDB, Express, React, Node.js) in remote, cross-functional teams. The candidate should be experienced with REST APIs, React frontends, backend architecture, database optimization, CI/CD, and reliability-focused systems, ideally with exposure to moderation, Trust & Safety, cloud platforms, Docker/Kubernetes, or game-related architectures. They should be comfortable owning features end-to-end, collaborating across product and design teams, and working on safety, anti-abuse, and moderation tools for large online communities.

1. How would you design a scalable moderation system for a platform like VRChat?
   I would separate moderation services into independent components such as reporting, content review, enforcement, and logging. Using queues, caching, and scalable APIs helps handle large volumes of real-time user activity efficiently.

2. What security considerations are important when building Trust and Safety tools?
   Key considerations include protecting user privacy, securing sensitive moderation data, preventing abuse of internal tools, and implementing proper authentication, authorization, and audit logging.

3. How would you optimize a MongoDB-backed Node.js API handling high traffic?
   I would use proper indexing, query optimization, pagination, caching with Redis, and efficient schema design. Monitoring slow queries and reducing unnecessary database calls are also important.

4. What experience do you have with RESTful API design?
   A good REST API uses consistent routes, proper HTTP methods and status codes, validation, authentication, and clear separation between business logic and transport logic.

5. How would you detect and mitigate abuse or spam in an online platform?
   I would combine rate limiting, telemetry analysis, automated detection rules, reputation systems, and moderation workflows. Logging and monitoring patterns are critical for identifying suspicious behavior early.

6. What challenges come with building moderation tools for real-time social platforms?
   The biggest challenges are scalability, latency, false positives, and balancing user safety with privacy. Systems also need to support fast response times for moderators while remaining reliable under heavy load.

7. How would you structure a React frontend for an internal moderation dashboard?
   I would organize components by feature, use centralized state management where needed, and focus on responsive, accessible UI patterns. Performance and usability are especially important for operational tools.

8. What role does Redis play in modern web applications?
   Redis is commonly used for caching, session storage, rate limiting, queues, and real-time features. It improves performance by reducing load on primary databases.

9. How do CI/CD pipelines improve engineering workflows?
   CI/CD automates testing, validation, and deployment, reducing human error and enabling faster, safer releases. It also helps maintain code quality in collaborative remote teams.

10. How would you balance user privacy with platform safety in Trust and Safety engineering?
    I would collect only the data necessary for abuse prevention, enforce strict access controls, and design systems with transparency and auditability. Safety systems should minimize invasive monitoring while still enabling effective moderation.

VRChat is looking for a Senior Engineer to join its Trust & Safety team and help build the systems that keep one of the world’s largest social VR platforms safe and scalable. In this fully remote role, you’ll work across the MERN stack (MongoDB, Express, React, Node.js) to develop moderation tools, anti-abuse infrastructure, and user safety features used by a global community of creators and players. You’ll collaborate with engineers from companies like Netflix, Meta, Google, and Discord while contributing to high-impact systems involving APIs, scalable backend services, and responsive web applications. With flexible hours, stock options, unlimited vacation, and the opportunity to shape the future of the metaverse, this is a strong opportunity for engineers passionate about online communities, safety, and modern web development.