Node.js Development: High-Performance APIs and Clusters

A non-blocking event loop by design. We handle 10k req/s with P99 < 50 ms, controlled backpressure and no memory leaks.

Request proposal View stack
  • <50ms P99 Latency
How we build: requirements, architecture, reviewed code, reversible deployment, measured performance and evolution with your team Every metric sets the next iteration 01 · Requirements What the businessneeds 02 · Architecture Documenteddecisions 03 · Code Reviewed andtested 04 · Deployment Automated andreversible 05 · Performance Core Web Vitals inthe green 06 · Evolution Your team asks, wedeliver
  1. 01 · Requirements What the business needs
  2. 02 · Architecture Documented decisions
  3. 03 · Code Reviewed and tested
  4. 04 · Deployment Automated and reversible
  5. 05 · Performance Core Web Vitals in the green
  6. 06 · Evolution Your team asks, we deliver
  7. Every metric sets the next iteration
Scroll

Definition

Why Does the Event Loop Matter?

Node.js is single-threaded. Every synchronous operation blocks all requests. A 10MB JSON.parse() freezes your server. Understanding the Event Loop is the difference between 100 req/s and 10,000 req/s.

Why

APIs, Microservices, Real-Time

Node.js architectures for every use case

Node.js is not just "JavaScript on the server". It's the optimal runtime for I/O intensive: REST APIs, GraphQL, WebSockets, message queues. NestJS for enterprise projects with DI and structure. Fastify for maximum performance microservices (2x Express). Worker Threads for CPU-bound tasks without blocking the Event Loop.

server.ts
// High-performance Fastify server
const app = Fastify({ logger: true });
app.get('/api/products', async (req) => {
return db.products.findMany({
where: req.query,
take: 100
});
});
  • <50ms P99
  • 10k+ Req/s
  • 0 Leaks

In numbers

Performance Guarantees

  • 10k+ Req/s per node
  • >80% Test coverage
  • 0 Memory leaks

Deliverables

What We Deliver

Every Node.js project includes:

Included

  • Complete REST or GraphQL API
  • TypeScript strict mode throughout
  • Unit + integration tests (>80% coverage)
  • Load testing with Autocannon
  • CI/CD pipeline configured
  • Monitoring and alerts (Prometheus/Grafana)
  • OpenAPI/Swagger documentation
  • Deployment on EU servers (GDPR)

Not included

  • WebSockets/real-time implementation
  • Monthly maintenance

Summary

For Decision Makers

Node.js enables high-concurrency APIs with a single language (JavaScript/TypeScript) on frontend and backend.

Reduces hiring costs: full-stack developers work on both sides of the stack.

npm ecosystem with millions of packages accelerates development. Faster time-to-market.

For the CTO

For CTOs

Optimized Event Loop: zero blocking operations. Worker Threads for CPU-bound tasks.

NestJS for enterprise projects with DI and structure. Fastify for maximum raw performance (2x Express).

Prisma/Drizzle for type-safe database access. BullMQ for job queues. Redis for caching and pub/sub.

What's included

Production Stack

  • NestJS / Fastify
  • TypeScript strict
  • Prisma / Drizzle
  • BullMQ + Redis
  • Vitest + Autocannon
  • Docker + K8s

Who it is for

Is It for You?

Who it's for

  • High-performance APIs (10k+ req/s)
  • Projects with real-time requirements (WebSockets)
  • Organizations with JavaScript/TypeScript stack
  • Startups needing fast iteration
  • I/O intensive systems

Who it's not for

  • CPU-bound intensive projects (better Python or Go)
  • Systems with heavy ML requirements
  • Teams without JavaScript experience

Risks and how we cover them

Risk Reduction

How we manage Node.js-specific risks in production.

  1. 01

    Blocked Event Loop degrading performance

    Mitigation

    Production lag monitoring with alerts. Worker Threads for CPU-bound operations. Profiling with Clinic.js.

  2. 02

    Memory leaks in production

    Mitigation

    Automatic heapdump above threshold. Sustained load tests in staging. Heap growth alerts.

  3. 03

    Dependencies with vulnerabilities

    Mitigation

    npm audit + Snyk in CI/CD. Renovate for automatic updates. Generated SBOM.

  4. 04

    Crashes without graceful shutdown

    Mitigation

    SIGTERM signals handled. Connections drained before shutdown. Health checks in K8s.

How we work

Methodology

  1. 01

    API Contract

    OpenAPI spec before code. Auto-generated types.

  2. 02

    Core

    Business logic with tests. Coverage >80%.

  3. 03

    Load testing

    Autocannon + Clinic.js. Iterative optimization.

  4. 04

    Production

    Rate limiting, graceful shutdown, monitoring.

Use cases

Use Cases

  • High-concurrency APIs

    10k+ req/s with predictable latency.

    P99 < 50ms

  • Real-time

    WebSockets for chat, notifications, collaboration.

    Latency < 100ms

  • Microservices

    Event-driven architectures with RabbitMQ/Kafka.

    Horizontal scaling

The proof

Backend Credentials

Team with 10+ years of experience in production Node.js architectures. APIs handling millions of daily requests for clients in fintech, SaaS and e-commerce. Optimized Event Loop, zero memory leaks, guaranteed P99.

  • 10+ Years with Node.js
  • 80+ APIs in production
  • Minimum test coverage >80%
  • Guaranteed uptime 99.9%

Technologies

Technologies

  • Node.js LTS
  • TypeScript 5
  • NestJS
  • Fastify
  • Prisma
  • Drizzle
  • BullMQ
  • Redis
  • PostgreSQL
  • gRPC
  • Vitest
  • Autocannon

FAQ

Frequently Asked Questions

Node.js for CPU-intensive tasks?

Not directly. We use Worker Threads for crypto/image processing, or Python microservices for heavy ML.

NestJS or Fastify?

NestJS for large teams and complex projects. Fastify for microservices and maximum performance (2x Express).

How do you detect memory leaks?

Heapdump in production with thresholds. Clinic.js in staging. Sustained load tests with heap tracking.

ORM or raw queries?

Prisma for DX and type-safety. Drizzle for critical performance. Raw only for specific optimizations.

Node.js or Laravel?

Node.js for I/O intensive, real-time and JavaScript teams. Laravel for product backends with heavy CRUD and admin panels. We work with both stacks and recommend based on your case.

How do you integrate with React/Next.js?

tRPC for end-to-end type-safety. GraphQL with Apollo Federation. REST with OpenAPI and typed SDK. See our React development service.

What if my team doesn't know Node.js?

Training included in enterprise projects. Initial pair programming. Team becomes autonomous.

Does it include hosting?

We configure on AWS, GCP or VPS. EU servers for GDPR. Optional monthly maintenance. More in cloud architecture.

Post-launch support?

Monthly maintenance contracts. Security updates, continuous optimization, technical support.

Next step

Unpredictable Latency?

Backend profiling. We find the bottleneck in your Event Loop.

Request proposal
  • No commitment
  • Response in 24h
  • Custom proposal
Last updated: July 2026

Let's talk.

Initial technical consultation

AI, security and performance. Diagnosis with phased proposal.

  • NDA available
  • Response <24h
  • Phased proposal

Your first meeting is with a Solutions Architect, not a salesperson.

Request diagnosis