Backend Engineering with Go

Explore practical error handling in go with a truck distribution simulation, using explicit nil checks, errors package, and fmt.Errorf to wrap context for top‑level and http handlers.

Learn how goroutines enable concurrent processing by launching parallel truck tasks, compare sequential vs parallel execution, and use wait groups to synchronize completion for scalable Go programs.

Learn to build a http server with Go's net/http package by implementing a handler that consumes requests, writes responses, and routes basic paths using listen and serve.

Build a production-ready API by encoding and decoding JSON requests, setting headers and status codes, validating input, and returning user data via in-memory storage in Go.

Organize your backend into transport, service, and storage layers to avoid spaghetti code, inject abstractions via interfaces, and apply the saga pattern for cross-service transactions.

Set up a Go http API by creating a main application, config, and server with timeouts. Implement a v1 grouped router, health check, and recovery middleware for reliable requests.

Configure runtime application settings with environment variables using os.LookupEnv, load from dot env files or the drive tool, and prepare the storage layer and repository pattern in the next module.

Adopt the repository pattern to decouple business logic from data storage, abstract storage with an interface, and enable in-memory or SQL implementations for testing and flexibility.

Implement a repository pattern in Go by organizing storage with interfaces for posts and users, a Postgres storage, and a constructor to wire them into the app.

Model a one-to-many relationship between users and posts and implement reproducible SQL migrations with Golang migrate or goose, including up and down scripts, version history, rollback, and related tooling.

Develop a get post by id endpoint in Go, with route grouping, explicit field selection, and robust not found and internal error handling.

Add comments support to posts by creating a comments table with post_id and user_id. Build a comments store to fetch posts with associated comments and user details.

explains building a Go seed script to populate the database with users, posts, and comments using a reusable seed function and a seed executable.

Implement a followers feature with a followers table using a composite key (user_id, follower_id), enabling put-based follow and unfollow endpoints and duplicate protection for personalized feeds.