Node.js Development for APIs, Services, & Real-Time Apps

We build Node.js services that connect your React and Next.js frontends to your databases, queues, and third-party integrations.

👋 Talk to a Node.js engineer.

Trusted and top rated tech team

When your backend hasn't kept up

Your Node.js application runs but it’s a patchwork — Express routes from three years ago next to newer services, inconsistent TypeScript coverage, CommonJS mixed with ESM, and an ORM that predates Prisma. Meanwhile your frontend team ships React and Next.js on the same runtime but the backend feels like a different ecosystem. Curotec engineers modernize and build Node.js backends that match how the runtime actually works now.

Our capabilities include:

REST and GraphQL API development
Microservices architecture and service boundaries
Real-time features with WebSockets and event-driven patterns
TypeScript migration and type safety across the stack
Serverless and edge function deployment
Legacy Express modernization to NestJS or Fastify

Who we support

We build and scale Node.js backends for teams running APIs, microservices, and real-time features where the runtime is production infrastructure, not a side project.

SaaS Teams Scaling a Node.js Backend

Your API handles production traffic but every new feature adds complexity. Routes are bloated, error handling is inconsistent, and there's no service boundary between your core product and the features bolted on over time. You need architecture that scales with your roadmap.

Companies Outgrowing Express

Your Express application was built fast and it worked. Now it's thousands of lines of middleware, no TypeScript, CommonJS modules, and an ORM you'd never pick today. You need incremental migration to modern patterns without rewriting what already serves your customers.

Engineering Leads Adopting Microservices

Your monolith handles everything and deploys as one unit. One bad release takes down the whole application. You need service boundaries, independent deployment, and clear contracts between components so teams ship without stepping on each other.

Ways to engage

We offer a wide range of engagement models to meet our clients’ needs. From hourly consultation to fully managed solutions, our engagement models are designed to be flexible and customizable.

Staff Augmentation

Get access to on-demand product and engineering team talent that gives your company the flexibility to scale up and down as business needs ebb and flow.

Retainer Services

Retainers are perfect for companies that have a fully built product in maintenance mode. We'll give you peace of mind by keeping your software running, secure, and up to date.

Project Engagement

Project-based contracts that can range from small-scale audit and strategy sessions to more intricate replatforming or build from scratch initiatives.

We'll spec out a custom engagement model for you

Invested in creating success and defining new standards

At Curotec, it is more than just the solutions we build. We value relationships between our people and our clients — that partnership is why CEOs, CTOs, and CMOs turn to Curotec.

Replatforming a clinical decision support tool used by physicians globally

Why choose Curotec for Node.js development?

Node.js runs your APIs, your real-time features, and the backend your React and Next.js frontends depend on. Our engineers build and maintain all of those because we work across the full JavaScript stack — not just the frontend or just the backend. When your API needs to talk to your database, your queue, and your AI pipeline, we don’t split that across three teams.

1 Extraordinary people, exceptional outcomes

Our outstanding team represents our greatest asset. With business acumen, we translate objectives into solutions. Intellectual agility drives efficient software development problem-solving. Superior communication ensures seamless teamwork integration.

2 Deep technical expertise

We don’t claim to be experts in every framework and language. Instead, we focus on the tech ecosystems in which we excel, selecting engagements that align with our competencies for optimal results. Moreover, we offer pre-developed components and scaffolding to save you time and money.

3 Balancing innovation with practicality

We stay ahead of industry trends and innovations, avoiding the hype of every new technology fad. Focusing on innovations with real commercial potential, we guide you through the ever-changing tech landscape, helping you embrace proven technologies and cutting-edge advancements.

4 Flexibility in our approach

We offer a range of flexible working arrangements to meet your specific needs. Whether you prefer our end-to-end project delivery, embedding our experts within your teams, or consulting and retainer options, we have a solution designed to suit you.

Where our Node.js engineering goes deep

API Design & Development

Build REST and GraphQL APIs with proper versioning, error handling, authentication, and documentation your frontend and mobile teams can consume reliably.

Microservices & Service Boundaries

Decompose monolithic backends into independently deployable services with clear contracts, message queues, and isolated failure domains.

Real-Time & Event-Driven Features

Ship WebSocket connections, server-sent events, and pub/sub workflows for chat, notifications, dashboards, and collaboration features.

TypeScript Migration & Adoption

Add type safety incrementally with strict configs, shared types between frontend and backend, and CI enforcement across your codebase.

Legacy Modernization & Framework Migration

Move from Express to NestJS or Fastify, CommonJS to ESM, and Sequelize to Prisma without downtime or a full rewrite of working code.

Serverless & Edge Deployment

Deploy Node.js functions on AWS Lambda, Vercel, or Cloudflare Workers with cold start optimization, monitoring, and cost-aware scaling.

What our Node.js engineers work with daily

Backend Frameworks & Routing

Our engineers choose frameworks based on your application’s complexity, scale requirements, and team conventions.

NestJS – TypeScript-first framework with dependency injection, modular architecture, and built-in support for microservices and GraphQL
Fastify – High-throughput framework with schema-based validation, plugin architecture, and low overhead for performance-critical APIs
Express.js – Minimal routing and middleware layer that remains widely deployed and serves as the foundation for many existing applications
Next.js – API routes and server actions running on Node.js alongside your React frontend in a unified deployment
tRPC – End-to-end type-safe APIs that share types between your Node.js backend and TypeScript frontend without code generation
Socket.io – Real-time bidirectional communication for chat, notifications, live dashboards, and collaborative features over WebSockets

Data Access & Databases

We connect your Node.js services to relational and document databases with ORMs and query builders matched to your data model.

Prisma – Type-safe ORM with auto-generated client, migrations, and schema-first design for PostgreSQL, MySQL, and SQLite
Drizzle ORM – Lightweight, SQL-like TypeScript ORM with zero overhead queries and full type inference from your schema
Knex.js – SQL query builder for complex queries, migrations, and seeding across multiple database engines
Mongoose – Schema-based modeling for MongoDB with validation, middleware hooks, and population for document relationships
Redis – In-memory data store for caching, session management, pub/sub messaging, and rate limiting across your services
GraphQL – Query language with Apollo Server or Mercurius for flexible data fetching across frontends, mobile apps, and third-party consumers

Authentication & Security

Our developers implement auth flows and security layers that protect your APIs, manage sessions, and enforce access controls.

Passport.js – Authentication middleware with strategies for OAuth, JWT, SAML, and local credentials across Express and NestJS
NextAuth.js – Authentication library for Next.js applications with provider integrations, session management, and role-based access
JWT & Refresh Tokens – Stateless authentication with token rotation, expiry management, and secure storage patterns
Helmet – Security middleware that sets HTTP headers to protect against XSS, clickjacking, and other common web vulnerabilities
Rate Limiting – Request throttling with express-rate-limit or Fastify plugins to prevent abuse and protect API availability
CORS & CSRF – Cross-origin and cross-site request configuration scoped per route and environment for secure client-server communication

Message Queues & Background Jobs

Curotec architects async workflows that keep your API responsive while heavy tasks run in background workers.

BullMQ – Redis-backed job queue for Node.js with priority scheduling, retries, rate limiting, and dashboard monitoring
RabbitMQ – Message broker for decoupling services with reliable delivery, routing patterns, and dead letter handling
AWS SQS – Managed message queue with AWS integration for serverless consumers, FIFO ordering, and automatic scaling
Kafka – Event streaming platform for high-volume data pipelines, log aggregation, and real-time processing across microservices
node-cron – Lightweight scheduler for recurring tasks like report generation, cleanup jobs, and periodic API syncs
EventEmitter – Native Node.js pattern for in-process event handling, used for decoupling modules and building plugin architectures

Testing & Code Quality

We validate APIs, services, and real-time features with testing tools built for Node.js async patterns and TypeScript.

Vitest – Fast test runner with native TypeScript and ESM support, compatible with Jest APIs for easy migration from existing suites
Jest – Widely adopted testing framework with snapshot testing, mocking, and coverage reporting across Node.js applications
Playwright – End-to-end browser testing for validating full-stack flows from your Node.js API through your frontend
Supertest – HTTP assertion library for testing Express, Fastify, and NestJS endpoints without spinning up a live server
ESLint & Prettier – Linting and formatting configured for TypeScript with strict rules enforced on every commit via pre-commit hooks
Pact – Contract testing framework that verifies API agreements between your Node.js services and their consumers

Deployment & Infrastructure

Curotec deploys Node.js services with containerization and CI tooling that keeps environments consistent and releases safe.

Docker – Multi-stage builds with slim Node.js images for consistent behavior across development, staging, and production
Kubernetes – Orchestrated deployments with horizontal scaling, health checks, and Helm charts for repeatable service releases
AWS – Deployment on ECS, Lambda, and App Runner with CloudWatch monitoring, S3 assets, and managed database integration
Terraform – Infrastructure-as-code for provisioning compute, networking, queues, and environment-specific configuration
GitHub Actions – CI workflows that run tests, linting, type checks, and deployment steps on every pull request before merge
PM2 – Process manager for Node.js applications with clustering, log management, and zero-downtime reloads in production

FAQs about our Node.js development services

Should we use NestJS or Fastify?

NestJS for teams that want opinionated structure, dependency injection, and built-in support for microservices patterns. Fastify for services where raw throughput and low latency matter most. We evaluate based on your team’s experience and your application’s requirements.

Ready to have a conversation?

We’re here to discuss how we can partner, sharing our knowledge and experience for your product development needs. Get started driving your business forward.