Sr. Fullstack Engineer

This role is ideal for a Senior Fullstack Engineer with 5+ years of experience, strong skills in React, Next.js, TypeScript, Node.js, and Express, and a solid grasp of CI/CD and scalable web infrastructure. Best suited for someone who thrives in remote work, can collaborate across time zones (especially PST), and enjoys working with high-profile clients. Familiarity with tools like AWS, Terraform, and Jenkins is a plus.

1. How do you structure a fullstack application using React, Next.js, and Node.js?
   Use Next.js for SSR and routing, React for UI, Express/Node.js as API layer or backend server, and organize features into modules with shared utilities and type definitions.

2. What are some best practices for handling millions of users in a distributed service architecture?
   Use load balancing, cache heavily with Redis/CDNs, apply rate limiting, monitor performance metrics, and use scalable services (e.g., AWS Lambda, ECS, RDS).

3. How do you manage CI/CD for a fullstack JavaScript application?
   Use GitHub Actions or Jenkins to run lint, tests, builds, and deploy to environments; automate using environment variables and secret management.

4. What’s your approach to error handling in a Node.js + React stack?
   Use centralized error handlers in Express, capture frontend errors with tools like Sentry, validate inputs at both ends, and return user-friendly error messages.

5. Describe how you optimize frontend performance in a Next.js app.
   Use dynamic imports, getStaticProps/getServerSideProps smartly, image optimization, caching headers, and Lighthouse audits for continuous tuning.

6. How do you ensure code quality in a large-scale TypeScript project?
   Use strict typing, ESLint/Prettier rules, code reviews, test coverage tools, and maintain a clear architecture and documentation.

7. What experience do you have working with infrastructure as code (e.g., Terraform, AWS)?
   [Example] Used Terraform to manage AWS resources like S3, EC2, RDS; automated deployments with GitHub Actions; and used CloudWatch for logs and alerts.

8. How do you manage and evolve complex codebases across a fullstack team?
   Modularize code, enforce naming conventions, write documentation, use feature flags, refactor iteratively, and prioritize technical debt in sprints.

9. How do you handle SEO and accessibility concerns in a React/Next.js app?
   Use semantic HTML, dynamic meta tags, server-side rendering for content, alt attributes, ARIA roles, and audit with tools like Lighthouse and Axe.

10. What strategies do you use to stay aligned with a globally distributed team?
    Use async communication via Slack/Notion, maintain up-to-date PRs, schedule overlaps in PST for syncs, and document decisions clearly for transparency.

Join X-Team as a Sr. Fullstack Engineer and work remotely with top-tier brands like Riot Games and Epic Games. You'll build scalable services using React, TypeScript, Next.js, Node.js, and Express, contributing to projects used by millions. Ideal candidates have 5+ years’ experience, a strong CI/CD background, and can work PST hours. This contract role offers flexible rates, vibrant community perks, and full-time remote freedom with global peers—all while shaping complex, high-impact applications.