Become a Production-ReadyJava Backend Engineer
- Learn
- Practice
- Build
- Master
One curriculum from your first program to distributed systems, taught the way the job is done: real code, real failure modes, and the question an interviewer actually asks. Courses, labs that execute, projects, system design and senior-level interview preparation.
Already write code? Start at Java Fundamentals
Follow the route, or go straight to what you need
The roadmap
Every course in 9 stages, in the order the prerequisites demand, with your progress on it. It starts at Programming Foundations and ends at Production Engineering and Distributed Systems.
See the roadmapThe catalogue
Every course grouped by what it covers — Core Java, Spring, databases, Kafka, DevOps, system design and the rest — for when you already know the gap.
Browse the coursesReading is the start. The rest is doing.
Labs that run
Java, SQL, Spring MVC, Kafka and Redis problems with real tests. The SQL lab runs in your browser; the Java labs on a sandboxed runner that re-checks every pass.
Open the practice hubProduction debugging
Incidents with dashboards, logs and a timeline. You diagnose — OOMs, consumer lag, pool exhaustion, deadlocks — and then compare with the write-up.
Debug an incidentProjects worth defending
10 backend systems with milestones, acceptance criteria and the trade-offs you will be asked about. Build them the way a team would.
See the projectsSystem design, argued
Every estimate states its assumptions, every decision states its cost. Design it first, then compare with the brief.
Design a system