nest

NestJS, zero to senior

A structured framework for Node backends — it gives your server a clear, opinionated shape so a TypeScript codebase stays organized as it grows into production.

10 units·38 lessons·~11 h

Start track →

Start from zero

Why Nest exists and the dependency-injection mental model.

01 Why NestJS, and the DI mental model 15 min

Building blocks

Modules wire providers into controllers via the DI container.

01 Modules, controllers, providers 16 min 02 Dependency injection, scopes, custom providers 17 min 03 Lifecycle hooks and graceful shutdown 17 min 04 Dynamic modules and async configuration 18 min 05 The request pipeline: middleware, guards, interceptors, pipes, filters 18 min

Validation & pipes

Validate at the edge with DTOs and pipes; gate with guards.

01 DTOs, class-validator and pipes 16 min 02 Guards, interceptors and exception filters 17 min 03 Custom pipes and the transformation stage 17 min 04 Whitelisting, nested validation and partial updates 17 min 05 Custom and async validators (and their traps) 18 min

Config and modules at scale

Configuration and composing modules at scale

01 The config module: typed, validated env 15 min 02 Dynamic modules: forRoot, forRootAsync, forFeature 17 min 03 Lifecycle hooks and graceful shutdown 15 min

Persistence the Nest way

Talk to a database the Nest way

01 TypeORM or Prisma: integrating an ORM 16 min 02 Repositories, transactions and the unit of work 18 min 03 Data modeling pitfalls: N+1, lazy vs eager, request scope 18 min

Authentication and authorization

Authenticate and authorize requests

01 Passport strategies and JWT auth 17 min 02 RBAC: roles, guards and the Reflector 18 min 03 Refresh tokens, rotation and reuse detection 18 min 04 Sessions vs JWT, and why logout is hard 18 min 05 JWT verification pitfalls: algorithms, claims and keys 18 min

Testing Nest

Test Nest without the whole app

01 Unit testing providers with the testing module 15 min 02 E2E testing with supertest 16 min 03 Mocking, test doubles and the over-mocking trap 17 min 04 Integration testing against a real database 18 min 05 Testing async code and killing flaky tests 18 min

Errors and observability

Production-grade error handling and telemetry

01 Exception filters and structured logging 16 min 02 Health checks and cross-cutting interceptors 17 min 03 Distributed tracing with OpenTelemetry 18 min 04 Metrics, percentiles and SLOs 18 min 05 Error tracking, correlation and alert fatigue 18 min

Microservices and GraphQL

Beyond a single REST app

01 Microservice transports: TCP, Redis, NATS, Kafka 18 min 02 Code-first GraphQL, resolvers and DataLoader 18 min 03 Message patterns and delivery semantics 18 min 04 Sagas, compensations and the outbox pattern 19 min 05 GraphQL hardening: query cost, depth and federation 19 min

Putting it together

Design a fully-typed, authed, tested Nest service end to end

01 Capstone: a fully-typed, authed, tested API 20 min

Build with this track

Guided projects that exercise what you learn here.

◆ Projects

Production-Shaped Nest Service

NestJS rewards you for structure and punishes you for skipping it. Build a service the way a team would ship it: feature modules with real boundaries, DTOs that validate at the edge, guards and interceptors that own cross-cutting concerns, a typed config you can't typo, and an e2e suite that boots the whole app. This is the difference between knowing Nest's decorators and knowing why they exist.

Next track

Logic, from zero

Propositions, proofs, and rigorous reasoning — the thinking layer beneath algorithms.