NestJS development for structured, scalable Node.js backends
NestJS is a Node.js framework written in TypeScript that organises code into modules, controllers and services with dependency injection. It suits larger APIs and microservices where many developers need to work in a consistent way.
NestJS brings the kind of architecture familiar from Angular, Spring or .NET to the Node.js world, which makes big codebases easier to navigate and test. It has built-in support for REST, GraphQL, WebSockets, queues and microservice transports. The structure does add boilerplate, so for a small API or a single serverless function it can be more than you need. If your team is more comfortable in PHP or Python, Laravel or Django may deliver faster.
What we build with NestJS
- Large REST and GraphQL APIs
- Microservices and event-driven systems
- SaaS backends
- Real-time services with WebSockets
- Integration layers between business systems
NestJS questions
How does NestJS differ from Express?
Express is a minimal HTTP library; NestJS is a full framework that usually runs on top of it and adds modules, dependency injection, validation and testing conventions.
Is NestJS a good fit for microservices?
Yes. It supports several transport layers for service-to-service communication, though we only recommend microservices when the system genuinely needs them.
Why is NestJS structure useful for larger teams?
NestJS organises code into modules, controllers and providers with dependency injection, so every developer knows where things belong. This consistency keeps large codebases manageable as teams change.
Does NestJS support GraphQL?
Yes. NestJS has first-class GraphQL support alongside REST, with schemas generated from TypeScript classes so types stay consistent between the API and the code.
How is NestJS tested?
Dependency injection makes services easy to isolate with mocks for unit tests, and NestJS provides utilities for end-to-end API tests. We run both automatically on every change.
Can NestJS generate API documentation?
Yes. NestJS integrates with OpenAPI to produce interactive API documentation from decorators on your controllers and data classes, keeping documentation in step with the code.
Which databases work with NestJS?
NestJS works with PostgreSQL, MySQL, MongoDB and others through established ORMs and query builders. We choose based on your data model and any existing systems.
How does NestJS handle authentication and authorisation?
NestJS uses guards and strategies to apply authentication and role or permission checks consistently across routes. It integrates with JWTs, sessions and external identity providers.
Can an existing Express application move to NestJS?
Yes. NestJS runs on top of Express by default, so existing middleware and logic can often be reused while the code is gradually reorganised into NestJS modules.
Does NestJS support background jobs and scheduled tasks?
Yes. NestJS integrates with job queues for background processing and includes scheduling support for recurring tasks such as reports, clean-ups and syncs.
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