The modern Java backend ecosystem revolves around the Spring Framework.
A backend developer must know how to store and retrieve data efficiently.
| Version | Key Feature | Backend Impact | |---------|-------------|----------------| | Java 17 (LTS) | Sealed classes, Pattern matching for switch | Better domain modeling | | Java 19 | Virtual Threads (preview) | Massive throughput gains | | Java 21 (LTS) | Virtual Threads (final), Scoped Values | Production-ready lightweight concurrency | | Java 22 | Unnamed variables & patterns | Cleaner lambda-heavy code | | Java 23 | String templates (preview) | Safer SQL/HTML generation |
Practice solving problems using Java to improve your algorithmic skills.
The demand for Java developers remains robust, particularly in backend engineering. Java developers are in high demand across sectors due to Java's reliability and scalability .
Mastering Object-Oriented Programming (OOPs), data types, and input/output.
Access categorized interview experiences from top companies (e.g., Amazon, Microsoft) to understand what recruiters are looking for.
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Many self-taught developers fail the backend interview because of these three issues. The GFG UPD explicitly flags them:
Representational State Transfer (REST) principles: