QalbIT uses NestJS on top of Node.js and TypeScript to build modular, maintainable backends. We design clear module boundaries, domain layers and APIs so your SaaS, mobile apps and internal tools have a stable core that can grow without chaos.
APIs · Microservices · Integrations
Typically responding within 24–48 hours. Share your current tech stack, product stage and timelines.
NestJS backend development overview
We use NestJS when you need a structured, TypeScript-first backend with clear modules, clean architecture and room to grow into microservices or a larger platform.
Most NestJS projects start with an architecture and requirements review so we can design modules, domains and APIs that match your product roadmap instead of just your first release.
What we build with NestJS
We focus NestJS on API layers and backends where structure, modularity and long-term maintainability really matter.
API platforms
NestJS-based API platforms with clear modules, routing, DTOs and validation for web, mobile and internal clients.
SaaS backends
Backends for SaaS products and multi-tenant systems, with tenancy, roles and permissions encoded into the architecture.
Microservices
Microservices, message-driven workflows and background workers using NestJS modules, queues and event buses.
Integrations
NestJS gateways that connect CRMs, ERPs, payment gateways and third-party APIs behind a consistent interface.
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 NestJS backend scope →How NestJS projects work with QalbIT
We apply a consistent process to NestJS projects so that modules, domains and APIs are well thought through before heavy coding starts.
1–2 weeks
Understand your product, users, workflows and existing systems. Identify domains, bounded contexts and integration points for the NestJS backend.
Key outcome: Documented domains, initial module plan and a shared understanding of priorities.
1–3 weeks
Design NestJS modules, controllers, services and data models. Define API contracts, validation rules and error-handling patterns.
Key outcome: Architecture blueprint, API specification and technical plan for implementation.
4–10+ weeks (scope-dependent)
Implement modules, repositories and services in NestJS. Integrate databases, queues and third-party APIs, and wire in authentication and authorisation.
Key outcome: Working NestJS backend in staging or production, aligned to your domains.
2–4 weeks
Add tests, run performance checks, review security and harden the system for real-world traffic and usage.
Key outcome: Stable, observable backend with clear SLAs and incident paths.
Ongoing, month-to-month
Support, improvements and new modules as your product evolves, with a clear release process and continued architecture guidance.
Key outcome: A NestJS backend that remains healthy, maintainable 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 NestJS process for my backend →Where NestJS is usually the right fit
We recommend NestJS when the backend is a long-term asset that multiple teams will rely on and extend.
For SaaS founders and product teams
SaaS products with multiple roles, complex permissions and a roadmap that needs a stable, modular backend.
For Operations, finance and support teams
Backends for internal operations, reporting, approvals and workflows, often replacing spreadsheets or legacy apps.
For Platform and integration teams
Products where external partners or third-party developers rely on your APIs and documentation.
For IT and digital transformation teams
NestJS layers sitting between CRMs, ERPs, payment gateways and other systems, providing a single, consistent interface.
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 NestJS is the right fit for your backend →Tech stack & tooling
We pair NestJS with TypeScript, relational databases, queues and modern tooling so your backend stays predictable and supportable.
Core backend foundations.
Persistence and performance tools.
How we expose and consume services.
Keeping NestJS backends healthy in production.
If you already have a NestJS or Node.js backend, we review your current stack first and only introduce changes that clearly improve stability, performance or maintainability.
Answers about NestJS architecture, API design, microservices 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 expertsNestJS is a framework built on top of Node.js and Express (or Fastify) that brings a modular, opinionated structure to backend development. It uses TypeScript, decorators and dependency injection, making large applications easier to organise, test and maintain compared to ad-hoc Express code.
NestJS is a strong choice when you need a structured, long-term backend: SaaS platforms, multi-module applications, API gateways, integration hubs or systems that a team of developers will work on for years. If you expect the codebase to grow and evolve, NestJS provides better structure than a minimal framework.
We use NestJS for SaaS backends, API platforms, integration layers, mobile and web app backends, microservices and event-driven systems. Many of these projects involve multiple roles, complex workflows, third-party integrations and a roadmap that requires a stable architecture.
We can do both. For existing NestJS projects we typically start with an architecture and code review, identify risks and quick wins, then stabilise and improve test coverage, performance and structure before adding new features. For new projects we design modules and domains from scratch based on your requirements.
NestJS works very well with modern React and Next.js frontends because all of them can share a TypeScript-first mindset and similar patterns. We often design DTOs, types and API contracts that can be shared or mirrored between frontend and backend, making integration smoother and less error-prone.
We often start with a well-structured “modular monolith” in NestJS because it is simpler to operate. When the product grows and specific modules need to scale or evolve independently, we can extract them into microservices using NestJS’s built-in patterns for messaging and distributed systems.
We design NestJS applications with efficient database access, proper indexing, caching and queues for heavy work. We also pay attention to architecture decisions that affect performance, set up metrics and monitoring, and test behaviour under realistic load so we can tune bottlenecks early.
We follow best practices such as HTTPS everywhere, token or OAuth-based authentication, role-based access control, input validation and sanitisation, rate limiting and secure secrets management. NestJS provides guards, interceptors and middleware that we use to enforce security consistently across modules.
Yes. We regularly integrate NestJS backends with CRMs, ERPs, payment gateways, email and messaging platforms, and legacy systems. We design integration modules with clear error handling, retries and observability so external issues do not silently break your product.
You can start by sharing your current architecture (if any), key use cases, target users and planned integrations. We then schedule a discovery session, propose an architecture and module plan, and provide a phased implementation roadmap with timelines and budget ranges.
Ready to talk NestJS?
Share your current backend, pain points and roadmap. We will review your context and propose a NestJS-based plan focused on clarity, scalability and long-term maintainability.
Typically we respond within 24–48 hours with clarifying questions and next steps.