The Core Series · Guide 05 · Free
The Ultimate Backend Roadmap.
The path I would tell a friend to follow if they wanted to become a backend engineer and get a job doing it. By the end you have one complete, deployed, tested service that touches almost everything a real production system does.
What's inside
- API basics: HTTP, REST, status codes, JSON, and your first habit tracker endpoint
- Picking a backend framework (Spring, FastAPI, Express) and the concepts that transfer between all of them
- Databases and data modeling with Postgres, the part most beginners are weakest on
- Authentication and authorization: password hashing, sessions vs JWTs, cookies, OAuth, and access control
- Input validation, SQL injection, and error handling that doesn't leak your stack trace
- File storage with S3 and calling third-party APIs without taking your app down with them
- Background jobs and queues so slow work stops blocking your users
- Caching with Redis, and the cache invalidation rule of thumb that actually holds up
- Testing: unit, integration, end-to-end, and which critical paths you must cover
- Deployment and observability: Docker, a real cloud host, logs, metrics, and alerts
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