> Markdown version of [/videos?event=world-congress-2025&page=126](https://www.wearedevelopers.com/videos?event=world-congress-2025&page=126). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Videos 2243 videos · 24305 moments · 1256.1 hours of content ## All videos ### Java 21: The Revolution of Virtual Threads - A Deep Dive Java 21 makes blocking great again. Discover how virtual threads replace complex reactive tooling, letting you fluidly scale to millions of concurrent operations with one Spring Boot flag. - **Speakers:** Christian Woerz - **Event:** WeAreDevelopers LIVE - **Published:** January 19, 2024 - **Duration:** 55:30 - [Watch](https://www.wearedevelopers.com/videos/843-java-21-the-revolution-of-virtual-threads-a-deep-dive) ### Enter the Brave New World of GenAI with Vector Search Why do traditional databases fail modern context-aware AI? Discover how Java developers can leverage vector search and the RAG pattern to eliminate GenAI hallucinations. - **Speakers:** Mary Grygleski - **Event:** WeAreDevelopers LIVE - **Published:** January 19, 2024 - **Duration:** 1:00:56 - [Watch](https://www.wearedevelopers.com/videos/844-enter-the-brave-new-world-of-genai-with-vector-search) ### Domain-Driven Transformation—How to Bring (Back) Sustainable Architecture to Legacy and Monoliths Taming a legacy monolith doesn't require a high-risk rewrite. Discover how domain-driven transformation untangles a big ball of mud into a sustainable, deployable architecture. - **Speakers:** Henning Schwentner - **Event:** WeAreDevelopers LIVE - **Published:** January 19, 2024 - **Duration:** 1:01:30 - [Watch](https://www.wearedevelopers.com/videos/845-domain-driven-transformation-how-to-bring-back-sustainable-architecture-to-legacy-and-monoliths) ### Debugging Unveiled: Exploring Debugger Internals and Hidden Gems Why do conditional breakpoints silently cripple your JVM performance? Uncover the hidden mechanics of Java debuggers to eliminate runtime overhead and master advanced troubleshooting workflows. - **Speakers:** Johannes Bechberger - **Event:** WeAreDevelopers LIVE - **Published:** January 19, 2024 - **Duration:** 58:23 - [Watch](https://www.wearedevelopers.com/videos/846-debugging-unveiled-exploring-debugger-internals-and-hidden-gems) ### Community Interview - PyLadies Berlin Can a community truly bridge the tech gender gap? Discover how PyLadies Berlin leverages Python, mentorship, and allies to turn beginners into confident industry leaders. - **Speakers:** Paloma Oliveira, Timna Aversa - **Event:** WeAreDevelopers LIVE - **Published:** December 15, 2023 - **Duration:** 18:48 - [Watch](https://www.wearedevelopers.com/videos/837-community-interview-pyladies-berlin) ### Tips, Techniques, and Common Pitfalls Debugging Kafka Stop manually piecing together logs during 2 AM Kafka crashes. Zero-code OpenTelemetry auto-instrumentation seamlessly traces asynchronous payloads, instantly isolating execution bottlenecks without refactoring application logic. - **Speakers:** Developersteve - **Event:** WeAreDevelopers LIVE - **Published:** December 15, 2023 - **Duration:** 54:29 - [Watch](https://www.wearedevelopers.com/videos/838-tips-techniques-and-common-pitfalls-debugging-kafka) ### Three-and-a-half Ways of Testing your Repositories Directly mocking database clients creates brittle tests that mask crucial API errors. Discover how to use ephemeral containers and HTTP stubs to achieve true environmental parity. - **Speakers:** Daniel Raniz Raneland - **Event:** WeAreDevelopers LIVE - **Published:** December 15, 2023 - **Duration:** 59:20 - [Watch](https://www.wearedevelopers.com/videos/839-three-and-a-half-ways-of-testing-your-repositories) ### Overview of Machine Learning in Python Are unaddressed demographic biases secretly destroying your predictive algorithms? Learn essential Python machine learning workflows to prevent data leakage, optimize hyperparameters, and build truly robust models. - **Speakers:** Adrian Schmitt - **Event:** WeAreDevelopers LIVE - **Published:** December 15, 2023 - **Duration:** 57:46 - [Watch](https://www.wearedevelopers.com/videos/840-overview-of-machine-learning-in-python) ### Hands on with OpenTelemetry Is microservice complexity turning your architecture into chaos? Discover how OpenTelemetry standardizes metrics, logs, and traces to prevent vendor lock-in and radically simplify distributed debugging. - **Speakers:** Nočnica Mellifera - **Event:** WeAreDevelopers LIVE - **Published:** December 15, 2023 - **Duration:** 53:57 - [Watch](https://www.wearedevelopers.com/videos/841-hands-on-with-opentelemetry) ### Demografie nutzen um jedem Bewerber das passende Angebot zu machen! Rigid job descriptions are costing you versatile talent. Learn how to future-proof your HR strategy by building adaptable roles around a candidate's unique demographic and life phase. - **Speakers:** Nathalie Gierth - **Event:** World Congress 2023 - **Published:** December 11, 2023 - **Duration:** 8:52 - [Watch](https://www.wearedevelopers.com/videos/836-demografie-nutzen-um-jedem-bewerber-das-passende-angebot-zu-machen) ### Creating a routing app with Google Maps API from scratch Transform a simple HTML element into a robust location-aware application. Master the Google Maps API, asynchronous geolocation, and dynamic route rendering from scratch. - **Speakers:** Germán Álvarez - **Event:** WeAreDevelopers LIVE - **Published:** December 1, 2023 - **Duration:** 55:39 - [Watch](https://www.wearedevelopers.com/videos/831-creating-a-routing-app-with-google-maps-api-from-scratch) ### Project Fugu: Extending the web You no longer need resource-intensive wrappers like Electron to build cross-platform applications. Project Fugu brings secure, native-level OS and hardware capabilities directly to the web platform. - **Speakers:** Lucien Immink - **Event:** WeAreDevelopers LIVE - **Published:** December 1, 2023 - **Duration:** 58:12 - [Watch](https://www.wearedevelopers.com/videos/832-project-fugu-extending-the-web) [Next page](https://www.wearedevelopers.com/videos?page=127)