Devoxx Courses

What about CSS - Progressive Enhancement and CSS

Explore how CSS progressive enhancement accounts for browsers’ varying support for CSS features, with practical tips for writing more resilient styles.

• YouTube
• 39 minutes
• Self-Paced
• Conference Talk

Engineering You

A look at how scientific and engineering thinking can shape the practices and craft of a software engineer.

• YouTube
• 48 minutes
• Self-Paced
• Conference Talk

The Many Shapes of Polymorphism

Through Java and Scala examples, this talk compares forms of polymorphism and shows how they shape program design.

• YouTube
• 47 minutes
• Self-Paced
• Conference Talk

Thinking in Parallel

Array programming replaces order-dependent mutation with operations on data aggregates, making Java code easier to understand and ready for parallel execution.

• YouTube
• 1 hour
• Self-Paced
• Conference Talk

Netty - One Framework to Rule Them All

A look inside Netty’s design, with lessons from the JVM challenges its developers faced while building the asynchronous networking framework.

• YouTube
• 1 hour 2 minutes
• Self-Paced
• Conference Talk

Optional - The Mother of All Bikesheds

Learn why Java’s Optional is often misused, and how to use it effectively while recognizing and refactoring common antipatterns.

• YouTube
• 59 minutes
• Self-Paced
• Conference Talk

Microservices Evolution - How to Break Your Monolithic Database

Learn how to evolve a legacy application by splitting its monolithic database into microservices without downtime.

• YouTube
• 1 hour 1 minute
• Self-Paced
• Conference Talk

A Crash Course in Modern Hardware

See why modern program performance depends on multicore execution and memory behavior as single-threaded CPU performance reaches its limits.

• YouTube
• 59 minutes
• Self-Paced
• Conference Talk

Debugging Distributed Systems

Trace a ZooKeeper failure from network stress testing to a TCP stream state mismatch, then follow the fix.

• YouTube
• 55 minutes
• Self-Paced
• Conference Talk

Declarative Thinking, Declarative Practice

A comparison of imperative and declarative thinking, with habits and techniques for applying declarative ideas from requirements through code and tests.

• YouTube
• 1 hour 1 minute
• Self-Paced
• Conference Talk

Functional Patterns for Scala Practitioners

Clément Delafargue shows how Scala practitioners can embrace functional programming through composable errors, expressive data models, and logic separated from effects.

• YouTube
• 59 minutes
• Self-Paced
• Conference Talk

Oops, I Broke My API

Explore when breaking an API is justified and how to introduce changes while helping users migrate to newer versions.

• YouTube
• 51 minutes
• Self-Paced
• Conference Talk

Lambda Puzzlers

Explore Java lambda puzzlers about variable capture, serialization in distributed systems, and adapting APIs not designed for lambdas.

• YouTube
• 47 minutes
• Self-Paced
• Conference Talk

A JVM Does That

An experienced JVM engineer examines where the virtual machine’s services come from, what they provide, and where their limits appear.

• YouTube
• 52 minutes
• Self-Paced
• Conference Talk

Wait, What? Our Microservices Have Actual Human Users

Explore ways to structure user interfaces in microservice systems, including modularization approaches and guidelines for avoiding monolithic frontends.

• YouTube
• 1 hour 1 minute
• Self-Paced
• Conference Talk