Courses
797 hands-on courses across every major language, framework, and discipline.
Object-Oriented Programming in Java
Design with objects in Java: classes, inheritance, composition, and SOLID principles for maintainable systems.
Functional Programming in Java
Apply functional techniques in Java: pure functions, immutability, higher-order functions, and composition.
Concurrency & Parallelism in Java
Write fast, correct concurrent Java: threads, async, synchronization, and avoiding race conditions and deadlocks.
Testing & TDD in Java
Ship reliable Java: unit and integration tests, mocking, and test-driven development workflows.
Data Structures & Algorithms in Java
Implement and apply the essential data structures and algorithms in Java, with complexity analysis and interview-style problems.
Design Patterns in Java
Apply battle-tested design patterns in Java to write flexible, maintainable, and extensible software.
High-Performance Java
Make Java fast: profiling, memory, algorithmic improvements, and the optimization techniques that matter in production.
Java by Building Projects
Learn Java by shipping real projects. Each one adds a new skill and something concrete to your portfolio.
Java Technical Interview Prep
Prepare for Java interviews: language deep-dives, common questions, coding challenges, and how to stand out.
Idiomatic Java & Best Practices
Write Java the way experts do: idioms, conventions, anti-patterns to avoid, and production-grade best practices.
Core C#
Go beyond the basics of C#: data types, collections, error handling, and the standard library you reach for every day.
Intermediate C#
Level up your C#. Write idiomatic, well-structured code and solve real problems with the right tools and patterns.
Advanced C#
Master advanced C#: deep language features, metaprogramming, internals, and the techniques senior engineers rely on.
Object-Oriented Programming in C#
Design with objects in C#: classes, inheritance, composition, and SOLID principles for maintainable systems.
Functional Programming in C#
Apply functional techniques in C#: pure functions, immutability, higher-order functions, and composition.
Concurrency & Parallelism in C#
Write fast, correct concurrent C#: threads, async, synchronization, and avoiding race conditions and deadlocks.
Testing & TDD in C#
Ship reliable C#: unit and integration tests, mocking, and test-driven development workflows.
Data Structures & Algorithms in C#
Implement and apply the essential data structures and algorithms in C#, with complexity analysis and interview-style problems.
Design Patterns in C#
Apply battle-tested design patterns in C# to write flexible, maintainable, and extensible software.
High-Performance C#
Make C# fast: profiling, memory, algorithmic improvements, and the optimization techniques that matter in production.
C# by Building Projects
Learn C# by shipping real projects. Each one adds a new skill and something concrete to your portfolio.
C# Technical Interview Prep
Prepare for C# interviews: language deep-dives, common questions, coding challenges, and how to stand out.
Idiomatic C# & Best Practices
Write C# the way experts do: idioms, conventions, anti-patterns to avoid, and production-grade best practices.
Core Go
Go beyond the basics of Go: data types, collections, error handling, and the standard library you reach for every day.