Question 1

What is Node.js?

Accepted Answer

Node.js is an open-source, cross-platform JavaScript runtime environment that executes JavaScript on the server side. It uses Chrome's V8 engine and an event-driven, non-blocking I/O model that makes it efficient for web servers, APIs, and real-time applications.

Question 2

Why should I use Node.js for my backend?

Accepted Answer

Node.js is ideal for API-heavy, I/O-bound applications. It handles high concurrency efficiently, uses the same language as your frontend, and has the world's largest package ecosystem (npm). It's proven at scale at companies like Netflix, LinkedIn, and Uber.

Question 3

What Node.js frameworks does Stacklyn use?

Accepted Answer

Stacklyn uses Express.js for traditional REST APIs, Fastify for high-performance APIs (2–3x faster than Express), and NestJS for enterprise-grade applications that benefit from a structured, opinionated framework.

Question 4

Is Node.js good for real-time applications?

Accepted Answer

Yes. Node.js is an excellent choice for real-time applications like chat, live notifications, collaborative editing, and streaming dashboards. The event loop and WebSocket support (Socket.io) make it natural for bidirectional real-time communication.

Question 5

Can Node.js handle high traffic?

Accepted Answer

Yes. Node.js handles high traffic well for I/O-bound workloads. Applications like Netflix, PayPal, and Uber handle millions of requests per day on Node.js. For CPU-intensive work, we use worker threads or background queues to avoid blocking the event loop.

Question 6

What database does Node.js work best with?

Accepted Answer

Node.js works with both SQL and NoSQL databases. We commonly use PostgreSQL with Prisma or Drizzle ORM for relational data, and MongoDB with Mongoose for document data. Redis is used for caching and queues.

Question 7

Does Stacklyn build serverless Node.js applications?

Accepted Answer

Yes. Stacklyn builds serverless Node.js functions on AWS Lambda and Cloudflare Workers. Serverless is ideal for event-driven workloads, APIs with variable traffic, and cost-efficient infrastructure for early-stage products.

Question 8

How does Node.js handle authentication?

Accepted Answer

Authentication in Node.js is handled using JWT (JSON Web Tokens) for stateless auth, session-based auth with Redis, or OAuth 2.0 for social logins. Libraries like Passport.js, Clerk, or custom JWT middleware are used depending on requirements.

Question 9

What is the difference between Express.js and Fastify?

Accepted Answer

Express.js is the most widely-used Node.js framework — mature, flexible, and with a huge ecosystem. Fastify is 2–3x faster than Express with built-in TypeScript support, schema validation, and JSON serialization. Stacklyn defaults to Fastify for performance-critical APIs.

Question 10

What is NestJS and when does Stacklyn use it?

Accepted Answer

NestJS is an opinionated Node.js framework built on TypeScript that follows Angular-like patterns (modules, controllers, services). We use NestJS for large enterprise applications where code organization, dependency injection, and team scalability matter.

Question 11

Does Stacklyn do Node.js performance optimization?

Accepted Answer

Yes. We profile Node.js applications using clinic.js, 0x flamegraphs, and custom benchmarks. Common optimizations include fixing event loop blocking, optimizing database queries, adding Redis caching, and implementing connection pooling.

Question 12

Can Stacklyn build Node.js microservices?

Accepted Answer

Yes. Stacklyn designs and builds Node.js microservices architectures with service-to-service communication via REST, gRPC, or message queues (RabbitMQ, Kafka, BullMQ). Each service is independently deployable via Docker containers.

Question 13

How does Stacklyn handle Node.js background jobs?

Accepted Answer

Background jobs in Node.js are handled using Bull or BullMQ with Redis as the queue backend. Jobs can be delayed, retried, scheduled (cron), or prioritized. This is used for email sending, report generation, data processing, and webhooks.

Question 14

Does Stacklyn write tests for Node.js applications?

Accepted Answer

Yes. We write unit tests (Jest or Vitest), integration tests (Supertest for API testing), and load tests (k6 or Artillery). Test coverage is maintained above 80% for critical business logic.

Question 15

How does Stacklyn document Node.js APIs?

Accepted Answer

We use OpenAPI 3.0 / Swagger to auto-generate API documentation. Fastify and NestJS have native OpenAPI support. Express APIs are documented using swagger-jsdoc or manual OpenAPI specifications.

Question 16

What is the cost of Node.js development in India?

Accepted Answer

Node.js development at Stacklyn starts at ₹1.5 lakh for simple API projects. Full backend systems range from ₹3–15 lakh depending on complexity. Hourly rates are ₹3,000–5,000 for senior Node.js engineers.

Question 17

Can Stacklyn upgrade or refactor an existing Node.js codebase?

Accepted Answer

Yes. We regularly upgrade legacy Express/Node.js codebases — adding TypeScript, upgrading dependencies, refactoring to modern patterns, and improving test coverage.

Question 18

Does Node.js work with GraphQL?

Accepted Answer

Yes. Node.js is commonly used with GraphQL via Apollo Server or Pothos GraphQL. We build GraphQL APIs when clients need flexible queries, real-time subscriptions, or a single endpoint for multiple data sources.

Question 19

What monitoring does Stacklyn set up for Node.js applications?

Accepted Answer

We configure application monitoring with Datadog, New Relic, or Sentry for error tracking. Infrastructure monitoring with CloudWatch (AWS) or Azure Monitor. Logging with Winston or Pino, structured as JSON for log aggregation.

Question 20

How do I hire Stacklyn for Node.js development?

Accepted Answer

Contact us at veenaprasad@stacklyn.in or WhatsApp +91 99617 46849. We offer a free technical consultation and project scoping call, followed by a detailed proposal within 48 hours.

Node.js Development Services — Fast, Scalable Backends

What is Node.js Development?

Our Node.js Development Services Include

Key Benefits of Node.js Development

High Throughput

Unified Language

Large Ecosystem

Microservices-Ready

Real-time Capabilities

Cost Effective

Our Node.js Development Process

API Design

Architecture

Development

Testing

Documentation

Deployment

Tech Stack We Use

Why Choose Stacklyn for Node.js Development

Node.js Since Day One

TypeScript-first

Security Standards

Performance Profiling

Database Expertise

API Documentation

See Our Node.js Development Work in Action

Node.js Development — Frequently Asked Questions

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