Courses_

Structured, multi-part learning paths. Start from scratch or jump to where you need to be.

// Featured1 course

Distinguished Engineer's Curriculum

The Holy Grail

A Distinguished Engineer's Curriculum. From transistors to lock-free data structures — the complete path from confused beginner to principal engineer who knows the internals of everything.

13sub-courses

124lessons

Begin the Grail →

// System Design2 courses

Rate Limiting Start course →

System Design Fundamentals Start course →

// JVM & Runtime5 courses

Step 1entry point

ClassLoader Pipeline Start course →

Step 2

Java Bytecode Start course →

Step 3

JVM Memory Regions Start course →

Step 4

Garbage Collection Start course →

Step 5

The JIT Compiler Start course →

// Java Language5 courses

Step 1entry point

Java Type System Start course →

Step 2

Java Strings Start course →

Step 3

Java Exceptions Start course →

Step 4

OOP Internals Start course →

Step 5

Java Generics Start course →

// Java Collections3 courses

Step 1

Lists Deep Dive Start course →

Step 2

Maps Deep Dive Start course →

Step 3

Sets & Queues Start course →

// Modern Java5 courses

Step 1

Lambdas & Functional Java Start course →

Step 2

Java Streams Start course →

Step 3

Java Collectors Start course →

Step 4

Modern Java Start course →

Step 5

Virtual Threads Start course →

// Java Concurrency10 courses

Step 1

Java Threads Start course →

Step 2

Java Memory Model Start course →

Step 3

Synchronization Primitives Start course →

Step 4

Explicit Locks Start course →

Step 5

Atomic & Lock-Free Start course →

Step 6

Executor Framework Start course →

Step 7

CompletableFuture Start course →

Step 8

Concurrent Collections Start course →

Step 9

Java Synchronizers Start course →

Step 10

Fork/Join & Work-Stealing Start course →

// Design Patterns5 courses

Step 1

SOLID Principles Start course →

Step 2

Creational Patterns Start course →

Step 3

Structural Patterns Start course →

Step 4

Behavioural Patterns Start course →

Step 5

Clean Architecture Start course →

// Java12 courses

Step 2

Java I/O Streams Start course →

Step 3

Java NIO Start course →

Step 4

Java NIO.2 Start course →

Step 5

Reflection & Dynamic Proxies Start course →

Step 6

Java Serialisation Start course →

Step 7

JDBC & Connection Pooling Start course →

Step 8

Database Transactions Start course →

Step 9

JPA & Hibernate Start course →

Step 10

Spring Data JPA Start course →

Step 11

Testing Mastery Start course →

Step 12

Reactive Java Start course →

Spring Boot — Zero to Production Start course →

// DevOps1 course

Docker: Beyond Just Containers Start course →