Rock the Code

Stephan Janssen is the founder of Devoxx, the largest chain of developer conferences in the world. --- 0:00 Intro 1:13 Vibe coding the Devoxx Companion app 5:30 Spec-driven development and the client-side validation bug 9:00 Token economics: spending €500 in one hour 15:00 Selfware and local models on Mac Studio 17:15 AI trends at Devoxx: MCP, agentic engineering, vibe coding's death 23:00 DHH's 180° and the developer renaissance 31:00 AI alignment and the Hugging Face agent incident 39:48 Skills still worth having as a senior engineer 44:28 What makes an amazing conference talk 49:17 Memorable Devoxx moments: hoverboards and proposals 55:20 Landing great speakers: bribing Joshua Bloch with Belgian beer 1:00:56 The future of Devoxx and DevRel in the age of AI agents 1:03:01 Robotics, local models, and what to learn next

Trisha Gee is a software engineer with more than 20 yeras of experience, a Java Champion and author of several books on Java and developer productivity. She is a frequent conference and keynote speaker and has held many roles around developer advocacy, training, consulting, and now managing an open-source project (the Aeron messaging protocol). You can find Trisha's work at https://trishagee.com/ --- 0:00 Intro 0:54 The Rise and Fall of Stack Overflow 5:05 Shortcuts vs. Fundamentals: Where to Draw the Line 15:03 What Actually Hasn't Changed in Software Engineering 21:04 Misusing the Word 'Refactor' 25:46 The Future of IDEs in an Agentic World 32:12 Teaching Developers to Read Code 37:58 Burnout: The 100% Capacity Problem 37:59 AI and the Joy of Coding 45:59 The Disappearing Junior Developer Pipeline 51:55 Pair Programming at LMAX: 6 Months vs. 10 Years 1:00:20 What Developer Advocacy Looks Like Now 1:07:18 Staying Relevant Without Panicking 1:18:09 Rebuilding a Website with Claude 1:24:04 Skill Atrophy and Using AI Without Losing Your Edge 1:31:19 Blogs and Resources Worth Reading 1:37:24 Are We Close to AI Best Practices? 1:40:03 Aeron, Determinism, and Agent Control Planes

Daniel Spiewak is known for spearheading Cats Effect, one of the major effect systems in the Scala ecosystem, and for leading Typelevel, a mini-ecosystem of libraries and tools for functional programming in Scala. He's held various senior engineering roles and is currently working for NVidia as a distinguished engineer. --- 0:00 Intro 1:00 Cats Effect 3.7 and Scala Native multithreading 6:30 Building async I/O from scratch on LLVM 9:30 The integrated runtime: replacing Java NIO on the JVM 13:30 Scala Native vs Rust: who wins? 17:00 Popularizing Scala Native with minimal resources 20:24 Scala in the agentic coding era 28:00 Where Scala's tooling falls short for AI agents 33:30 Resource lifecycle bugs: capture checking as the fix 37:38 Daniel's work at NVIDIA on autonomous vehicles 43:00 The Distinguished Engineer role explained 49:19 Becoming a Distinguished Engineer fast 54:18 Holding abstractions and bare metal simultaneously 1:03:00 Lessons from open source on people and patience 1:13:19 Starting a foundational OSS project: the steam engine analogy 1:20:00 The open frontier: DevOps and deployment orchestration in Scala 1:33:00 Unison's insight and what Scala should borrow

Dr. Venkat Subramaniam is an engineer, a professor at University of Houston, an author of more than 10 programming books, and a prolific speaker at technical conferences. He's trained tens of thousands of software engineers all across the world, consulted dozens of companies, and he's recognized as a Java Champion since 2013. You can find Venkat's work at https://agiledeveloper.com/ --- 0:00 Intro 1:07 AI as an amplifier: smart gets smarter 3:02 Why automated testing matters more with AI 7:38 The cost of failure and engineering discipline 12:50 Skin in the game: software's accountability gap 18:02 LLM-driven speed vs. engineering rigor 20:04 Local vs. global optimization in software orgs 26:21 LLMs vs. compilers: the cognitive decline fear 37:27 Gang of Four and SOLID: still relevant? 43:15 Design patterns as language deficiencies 46:32 Java's evolution: lambdas, value types, and the 6-month release cycle 55:02 invokeDynamic: the invisible JVM feature that changed everything 59:48 TypeScript, Elm, and the case for immutability 1:08:11 "There's got to be a better way" 1:19:10 TDD in practice: pair programming over training 1:26:41 Working for impact, not income 1:31:07 Venkat's approach to conference talks and live coding 1:38:01 The Kyiv keynote disaster 1:41:38 The art of elegant code 1:42:50 Immutability: human reasoning vs. system performance 1:47:51 "Help and seek help"

Magnus Madsen is an associate computer science professor at Aarhus University and the creator of the Flix programming language. --- 0:00 Intro 1:37 Flix fundamentals and design philosophy 3:57 Effect systems in the language vs. as a library 6:30 Effects as checked exceptions 10:57 Type inference and effect propagation 15:53 LLMs and Flix code generation 22:47 Datalog inside Flix 32:13 Research language vs. industry needs 37:03 Compiler tooling and VS Code integration 49:02 No warnings, only errors 51:03 Effect-aware package manager and supply chain attacks 54:59 Why the JVM, and WebAssembly futures 58:04 Flix-generated code outperforming Java 1:01:31 Java interop and effect system boundaries 1:07:48 Is programming language design still relevant in the AI age 1:09:35 Design regrets in Flix 1:13:09 Maintaining motivation across a decade of work