Devoxx Courses

Modular Monoliths

A critique of microservices hype argues that sound design thinking is just as necessary for a well-structured monolith.

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

Designing for Performance

Explore how hardware behavior and leaky abstractions shape software designs for better response times, throughput, and scalability.

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

Testing Legacy Code

Retrofit tests onto untested legacy code with characterization testing, coverage measurements, and refactoring.

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

Containers, VMs, Processes - How All of These Technologies Work

A behind-the-scenes comparison of processes, containers, and virtual machines, using demos to show how isolation works.

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

Introduction to Modular Development

Explore how Java’s built-in modules fit together, then create a module from scratch and compile, test, and run it.

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

Twelve Ways to Make Code Suck Less

Explore recurring code smells and design choices—such as loose coupling, expressive names, and clear abstractions—that help code stay clear and changeable.

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

G ∘ F Patterns

Reworks common Gang of Four patterns as concise Java 8 lambda-based functions through live-coding examples.

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

Security and Microservices

Examines how microservices can strengthen or widen security exposure, using defense in depth to frame protection for fine-grained distributed architectures.

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

The End of Polling - Why and How to Transform a REST API into a Data Streaming API

Shows how to replace polling with real-time API streams, comparing Server-Sent Events and WebSockets and reducing transferred data with JSON-Patch.

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

Reactive Programming

Build reactive applications with observables, handling errors, synchronous and asynchronous flows, hot and cold observables, and backpressure.

• YouTube
• 2 hours 36 minutes
• Self-Paced
• Conference Talk

Configuration Management with Spring

See how Spring Config Server manages application settings across environments, with refresh workflows and credential storage using Vault and Consul.

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

The Design of a Reliable and Secure Operating System

MINIX 3’s multiserver design reduces operating-system failure risks and enables live updates while applications keep running.

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

Software Architecture as Code

Explore how architecturally evident coding styles can keep software architecture models aligned with the code that embodies them.

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

Everything You Need to Know to Grow Open Source

Dan Allen shares practices for growing open source communities through purpose, open communication, welcoming first impressions, and recognition.

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

Lean Pricing – Pricing Strategies for Startups

A practical guide to how startups can discover suitable prices, comparing 11 pricing methods and freemium with premium.

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