> Markdown version of [/videos?event=world-congress-2025&page=159](https://www.wearedevelopers.com/videos?event=world-congress-2025&page=159). 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 ### Svelte ♥ TypeScript and so will you Svelte's simplicity no longer requires sacrificing type safety. Master generic components, svelte-check, and typed contexts to eliminate runtime exceptions and scale your frontend architecture. - **Speakers:** Ivan Hofer - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 28:20 - [Watch](https://www.wearedevelopers.com/videos/493-svelte-typescript-and-so-will-you) ### The Rise of Reactive Microservices Every architecture buys options but demands payment in complexity. Stop slicing services by data objects with brittle synchronous APIs. Learn when to actually transition to reactive microservices. - **Speakers:** David Leitner - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 46:24 - [Watch](https://www.wearedevelopers.com/videos/494-the-rise-of-reactive-microservices) ### What we Learned from Reading 100+ Kubernetes Post-Mortems Subtle YAML errors and missing memory limits are silently crashing your Kubernetes clusters. Uncover the leading root causes from 100+ post-mortems and automate infrastructure validation directly within CI workflows. - **Speakers:** Noaa Barki - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 28:36 - [Watch](https://www.wearedevelopers.com/videos/495-what-we-learned-from-reading-100-kubernetes-post-mortems) ### Advanced Typing in TypeScript Can you map JavaScript's unpredictable patterns into strongly typed systems? Learn to build a Pandas-like dataframe in TypeScript that catches complex schema mismatches strictly at compile time. - **Speakers:** Lars Hupel - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 28:44 - [Watch](https://www.wearedevelopers.com/videos/496-advanced-typing-in-typescript) ### Angular Magical directives Still relying on external frameworks for your UI? Master Angular's magical structural directives to build flexible, highly reusable components without polluting your DOM. - **Speakers:** Valentine Awe - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 29:11 - [Watch](https://www.wearedevelopers.com/videos/497-angular-magical-directives) ### Don't Be A Naive Developer: How To Avoid Basic Cybersecurity Mistakes Information security expert Tino argues that 90% of breaches stem from human error, not tech. Learn to ditch the 'it works' fallacy and fix your naive coding habits. - **Speakers:** Tino Sokic - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 28:01 - [Watch](https://www.wearedevelopers.com/videos/498-don-t-be-a-naive-developer-how-to-avoid-basic-cybersecurity-mistakes) ### For the Cars and the Curious: Android Drift How are developers safely bringing multi-screen experiences natively to the dashboard? Dive into Android Automotive OS to see how Kotlin and Jetpack Compose power tomorrow's smart vehicles. - **Speakers:** Stephan Schuster - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 30:46 - [Watch](https://www.wearedevelopers.com/videos/499-for-the-cars-and-the-curious-android-drift) ### Java Sealed Classes vs. Kotlin Sealed Classes #Slideless Tired of unpredictable, null-prone code? Discover how sealed classes in both Java 17 and Kotlin eliminate nullable return types through strict hierarchies and exhaustive pattern matching. - **Speakers:** Lothar Schulz - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 38:07 - [Watch](https://www.wearedevelopers.com/videos/500-java-sealed-classes-vs-kotlin-sealed-classes-slideless) ### Model Governance and Explainable AI as tools for legal compliance and risk management Meeting AI compliance isn't just a legal necessity; it is a concrete engineering problem. Learn how uniting MLOps with explainable AI protects your high-risk models from costly errors. - **Speakers:** Kilian Kluge, Isabel Bär - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 29:30 - [Watch](https://www.wearedevelopers.com/videos/501-model-governance-and-explainable-ai-as-tools-for-legal-compliance-and-risk-management) ### Why pair programming is the best usability testing tool for developer focused products? Traditional usability interviews fail to accurately capture complex developer workflows. Learn why pair programming is the ultimate testing tool to uncover hidden habits and build frictionless developer products. - **Speakers:** Anil Kumar Krishnashetty - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 24:48 - [Watch](https://www.wearedevelopers.com/videos/503-why-pair-programming-is-the-best-usability-testing-tool-for-developer-focused-products) ### Writing a full-text search engine in TypeScript Slow programming languages are a myth. Bad data structures are the reality. Watch how mastering algorithms unlocks microsecond full-text search speeds natively in TypeScript. - **Speakers:** Michele Riva - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 39:39 - [Watch](https://www.wearedevelopers.com/videos/504-writing-a-full-text-search-engine-in-typescript) ### A Data Mesh needs Open Metadata Decentralized data meshes fail without standardized interoperability. Discover how the open-source metadata standard Egeria automates end-to-end governance and eliminates integration bottlenecks across multi-cloud environments. - **Speakers:** Ferd Scheepers - **Event:** World Congress 2022 - **Published:** June 15, 2022 - **Duration:** 38:36 - [Watch](https://www.wearedevelopers.com/videos/505-a-data-mesh-needs-open-metadata) [Next page](https://www.wearedevelopers.com/videos?page=160)