What you'll learn
Structure a NestJS backend into bounded contexts with clean domain, application, infrastructure, and presentation layers
Design rich domain models with aggregates, entities, and value objects that make invalid state unrepresentable
Implement CQRS with commands, queries, and handlers using @nestjs/cqrs
Emit domain events from business logic and orchestrate workflows across bounded contexts with sagas
Apply ports and adapters to swap PostgreSQL for MongoDB - or one notification provider for another - without touching business logic
Enforce business invariants and state machines inside aggregates instead of scattering rules across services
Integrate Stripe payments and webhooks behind clean architecture boundaries
Implement real world email notifications with Mailtrap
Requirements
Comfortable with TypeScript - classes, interfaces, and async/await
Basic NestJS familiarity: modules, controllers, and providers
Node.js installed and a running PostgreSQL instance (a free local install or Docker container is fine)
No prior DDD or Clean Architecture experience needed - every pattern is taught from first principles
Description
Most NestJS tutorials stop at controllers calling services calling a database. This course is about what comes after that: how to structure a real backend so business logic lives in one place, is fully unit-testable, and doesn't fall apart when requirements change.
Together we build a complete e-commerce system from scratch - products, customers, orders, and payments - as four autonomous bounded contexts, applying Domain-Driven Design and Clean Architecture patterns to every layer.
What you'll learn to build
- Rich domain models with aggregates, entities, and value objects - where invalid state is unrepresentable, and every state change goes through behavior methods
- CQRS with commands, queries, and handlers using @nestjs/cqrs
- Domain events emitted from business logic - and sagas that orchestrate workflows across bounded contexts (order placed → payment created → order confirmed)
- Ports and adapters: swap PostgreSQL (Drizzle) for MongoDB, or console notifications for real email notifications via Mailtrap, by changing a single line
- Child entities with their own state machines whose status drives the parent aggregate
- Real integrations: Stripe payments with webhook handling & Mailtrap email notifications
- A clean REST API layer with DTOs and validation that dispatches commands and never touches domain objects directly
Every concept is introduced in order: value objects first, then entities, aggregates, collection invariants, and finally cross-context orchestration. You never see a pattern before you have the foundation for it.
Who this course is for
Intermediate backend developers who can build CRUD apps and want to design systems that survive years of changing requirements
NestJS and Node.js developers who've heard of DDD, CQRS, and Clean Architecture but haven't seen them applied to a real, complete project
Developers preparing for senior/architect roles where domain modeling and system boundaries are the job


https://rapidgator.net/file/28ace69c1513beba10484d3cb828a40a/Clean_Architecture_in_.NET_8_Core_MVC_with_real_time_project.part4.rar.html
https://rapidgator.net/file/791bfc489add31ef09e64d36b3a0838f/Clean_Architecture_in_.NET_8_Core_MVC_with_real_time_project.part3.rar.html
https://rapidgator.net/file/34e1328fcd8ce4d38a9a327e7b3ec8c4/Clean_Architecture_in_.NET_8_Core_MVC_with_real_time_project.part2.rar.html
https://rapidgator.net/file/80f98b34aa6e9f08169fa6e11e57ad9b/Clean_Architecture_in_.NET_8_Core_MVC_with_real_time_project.part1.rar.html
https://rapidgator.net/file/5037dd93a510a2b0a9b46281750a3e43/Clean_Architecture_&_Domain-Driven_Design_in_NestJS.part1.rar.html
https://rapidgator.net/file/e3ba16e7d1dbd243b679f4165ff97c0a/Clean_Architecture_&_Domain-Driven_Design_in_NestJS.part2.rar.html
https://rapidgator.net/file/c2919ac4a114863b710ee88af177de47/Clean_Architecture_&_Domain-Driven_Design_in_NestJS.part3.rar.html
https://rapidgator.net/file/9260af72075e468d7b7992d0a5ac639e/Clean_Architecture_&_Domain-Driven_Design_in_NestJS.part4.rar.html
https://rapidgator.net/file/e83322594625c47154bf63d14f0a1997/Clean_Architecture_&_Domain-Driven_Design_in_NestJS.part5.rar.html
https://rapidgator.net/file/ae156f7e4c8ffe6228723c55c6f2d955/Clean_Architecture_&_Domain-Driven_Design_in_NestJS.part6.rar.html
https://rapidgator.net/file/ca17b7b2c557807408e985fc0992e971/Clean_Architecture_&_Domain-Driven_Design_in_NestJS.part7.rar.html
https://rapidgator.net/file/ff1aab92fd12a94cd49f5b3e2dac5d43/Clean_Architecture_&_Domain-Driven_Design_in_NestJS.part8.rar.html