QalbIT uses Node.js and NestJS to build API-first backends for SaaS products, mobile applications and internal tools. We focus on clean architecture, predictable performance and robust integrations so your backend stays reliable as your product, traffic and team grow.
APIs · Integrations · Real-time
Typically responding within 24–48 hours. Share your current tech stack, product stage and timelines.
Node.js backend development overview
We help teams use Node.js where it is strongest – API platforms, integration layers, mobile backends and real-time features that benefit from a fast, event-driven runtime.
For Node.js and NestJS projects we usually start with a short discovery and architecture review, then define a realistic implementation or migration plan for your API layer.
What we build with Node.js
We focus Node.js and NestJS on backends where performance, integrations and developer experience matter over the long term.
APIs
Design and implementation of REST/JSON and GraphQL APIs that power web, mobile and partner applications.
Mobile backends
Backends for mobile apps and single-page applications, including authentication, authorisation and business logic.
Real-time
WebSocket, notification and event-driven architectures using queues, workers and background jobs.
Integrations
Node.js-based integration layers between CRMs, ERPs, payment gateways and internal systems.
Want to see how these capabilities map to your product? Share a quick overview and we will respond with a practical next step.
Discuss your Node.js backend scope →How Node.js projects work with QalbIT
We keep the Node.js process structured but pragmatic: clarify requirements, design the architecture, then build, harden and operate the backend with you.
1–2 weeks
Understand your product, existing systems and integration needs. Review current backends (if any) and define boundaries for the Node.js layer.
Key outcome: Documented goals, constraints and a proposed Node.js/NestJS architecture.
1–3 weeks
Define domains, modules, endpoints, request/response contracts and data models, using patterns that fit NestJS and your wider stack.
Key outcome: API specification, module boundaries and a technical blueprint for implementation.
4–10+ weeks (scope-dependent)
Implement modules, endpoints, authentication and business logic, wiring in databases, queues and third-party services.
Key outcome: Working Node.js/NestJS backend in staging or production, integrated with your systems.
2–4 weeks
Functional tests, performance checks, security review and step-by-step rollout with logging and monitoring.
Key outcome: Stable, observable backend with a clear improvement backlog.
Ongoing, month-to-month
Support, enhancements and new modules as your product evolves, with clear SLAs and release processes.
Key outcome: A Node.js backend that stays healthy and aligned with your roadmap.
Want to see how this process applies to your current stage? Share a short brief and we will respond with a tailored next step.
Walk me through this Node.js process for my product →Where Node.js is usually the right fit
Most Node.js work we do is at the heart of a product – not side scripts – so we design for long-term stability and growth.
For SaaS founders and platform teams
Core APIs that power SaaS products, partner integrations and public developer ecosystems.
For Product and mobile teams
Backends serving Flutter, React Native and web SPAs with authentication, permissions and business rules.
For Teams building interactive products
Systems that need live updates, streaming data or notification pipelines.
For Operations and IT teams
Node.js services that connect CRMs, ERPs, payment gateways and internal tools via APIs and queues.
Not sure if your idea or system belongs here? Send us a short description and we will tell you honestly whether we are the right team for it.
Ask if your backend is a good fit for Node.js →Tech stack & tooling
We pair Node.js with NestJS, TypeScript and proven infrastructure components so your backend is easier to evolve and support.
Core backend technologies.
Databases, caching and queues.
How we expose and consume services.
Keeping backends robust in production.
If you already have a Node.js backend, we start with a review of your codebase, dependencies and infrastructure, then recommend incremental improvements instead of forcing a full rewrite.
Answers about Node.js, NestJS, API design, performance and how QalbIT delivers backend projects.
Have a question that is not listed here?
Share your roadmap or idea and we’ll help you pick the right engagement model, tech stack and starting point.
Contact our expertsNode.js is a JavaScript runtime built on Chrome’s V8 engine, well-suited for building fast, I/O-heavy backends such as APIs, integrations and real-time features. It is a strong fit when you need to serve web, mobile and third-party clients from a single, scalable API layer.
We use Node.js and NestJS for SaaS platform APIs, mobile backends, integration layers between systems, real-time features (such as notifications and chats) and background workers that process queues, imports and scheduled jobs.
For most production backends we use NestJS on top of Node.js because it provides a clear module structure, dependency injection and patterns that scale for larger teams. We also use Express or lighter stacks where a simple API or microservice is enough.
We do both. We can review and stabilise an existing Node.js codebase, improve architecture and performance, add tests and monitoring, and then continue with new features. Where a partial rewrite makes more sense, we plan it in phases rather than replacing everything at once.
We look at your existing stack, team skills, performance needs and roadmap. Laravel is excellent for many web applications and back-office systems, while Node.js/NestJS works very well for API platforms, heavy integrations, real-time features and teams that prefer a TypeScript-first stack. In some cases we combine both where that is practical.
We design Node.js backends with efficient database access, proper indexing, caching, queues for heavy work and horizontal scaling in mind. We also add metrics and monitoring so we can observe behaviour under load and tune bottlenecks before they become issues.
Security is treated as a core requirement. Typical measures include HTTPS everywhere, token or OAuth-based authentication, role-based access control, input validation, rate limiting, secure secrets management and structured logging. We also review dependencies regularly and apply updates to reduce known vulnerabilities.
Yes. One of the main benefits of a Node.js API-first backend is that the same core services can power web frontends, mobile apps, internal tools and third-party integrations. We define clear API contracts and versioning so different clients can evolve without breaking each other.
Yes. A large part of our Node.js work involves integrating with CRMs, ERPs, payment gateways, messaging platforms and legacy systems. We design stable integration patterns with proper error handling, retries and observability so external issues do not break your product experience.
You can start by sharing your current architecture, key use cases and any performance or reliability issues you are facing. We then schedule a discovery session, propose an architecture or migration approach, and provide a phased plan with timelines and budget ranges.
Ready to talk Node.js?
Share your current architecture, tech stack and backend pain points. We will review your situation and propose a Node.js and NestJS plan focused on stability, performance and long-term maintainability.
Typically we respond within 24–48 hours with clarifying questions and next steps.