I build robust Node.js backends that power modern web applications. From RESTful APIs to real-time servers to microservices, I deliver Node.js solutions that are fast, secure, and built to scale. Every project includes authentication, error handling, logging, and monitoring from day one. RESTful API design with Express. Fastify. or Koa following OpenAPI standards. GraphQL API development with Apollo Server or similar for flexible data fetching. Database design and ORM integration with Prisma. Drizzle. or Sequelize. Authentication and authorization with JWT. OAuth2. or session-based strategies. Real-time features with WebSockets. Server-Sent Events. or Socket.io. Job queues and background tasks with Bull. RabbitMQ. or similar. File uploads and cloud storage integration (AWS S3. Cloudinary). Payment processing integration (Stripe. PayPal APIs) with webhook handling. Do you work with existing Node.js codebases?: Yes - I audit, refactor, and optimize existing Node.js backends. Common work includes performance tuning, security hardening, and adding new features. REST API or GraphQL - which should I use?: REST is simpler and proven. GraphQL is more flexible for mobile and complex data needs. I help you choose based on your use case and team skill. How do you handle authentication?: I implement JWT tokens, OAuth2 flows, or session-based auth depending on your needs. All approaches include rate limiting, refresh token rotation, and secure password handling. What databases do you recommend?: PostgreSQL for relational data, MongoDB for flexible schemas, and Redis for caching/sessions. I choose based on your data model and query patterns.