~/talks

Danny Preussler

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Clean Code Revisited in the Age of AIdroidCon USA 20262026-07-16
Revisits Uncle Bob rules against the backdrop of LLMs and shows which rules still hold and which need tweaks: named arguments in Kotlin invalidate the “max 3…
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Android to Full-Stack: A Devs Journey to the Great Unknowndroidcon Berlin 20252025-09-24
Claims concrete transferability: Android architecture, coroutines and Compose map to back-end and web patterns so ramp-up is fast but junior-level in new…
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Kotlin Notebooks: Data Visualization for Developers (No Scientist Required)AndroidMakers by droidcon 20252025-04-10
Kotlin Notebooks show concrete workflows: use an IntelliJ plugin and a Kotlin kernel to load CSVs and JSON from APIs into a data frame, call GitHub’s API and…
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Ten things you heard about testing that might be wrongdroidcon London 20242024-10-31
Argues that most unit test failures come from implementation changes not bugs, so tests should verify behavior not structure; warns that heavy mocking and DI…
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Ten things you heard about testing that might be wrongdroidcon New York 20242024-09-19
Ten myths get debunked with concrete examples and numbers: studies show ~50% of developers hit flaky tests monthly and Google reports 41% flaky tests…
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The Future of 3rd Party App Ecosystems in Carsdroidcon Berlin 20242024-07-03
OEMs are rolling out Android Automotive stores (BMW already ships a store client) while vendors offer white‑label stores and QA bridges; current tooling is…
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Behind the mirror, Kotlin Reflectiondroidcon Berlin 20242024-07-03
Kotlin reflection exploration shows exactly what works and how: use KClass/KType/KFunction/KProperty to inspect constructors, nullability and suspend…
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Behind the mirror, Kotlin ReflectionAndroidMakers by droidcon 20242024-04-25
Shows concrete handles not just theory: how Kotlin exposes KClass / KType / KFunction / KProperty at runtime, how suspend methods require passing a…
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The Rise and Fall of Feature Teamsdroidcon Berlin 20232023-07-05
Company moves from cross‑functional feature teams back to platform silos after seeing understaffed teams, fragmented codebases and rising operational…
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Android Fireside Chatdroidcon Berlin 20232023-07-05
Panel lays out concrete guidance: start greenfield apps 100% Compose with a single-activity and Navigation Compose; use state hoisting and ViewModel-backed…
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The Rise and Fall of Feature TeamsAndroid Makers by droidcon 20232023-04-27
Claim: cross‑functional feature teams break down at medium scale and spawn new silos and unowned black boxes. Evidence: a cited study finds 75% dysfunctional…
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Testing: how hard can it be?droidcon Berlin 20222022-07-06
Builds a Compose login flow and proves it with JVM tests that exercise ViewModel coroutines, a Retrofit/Moshi API client, and an…
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Testing: how hard can it be?droidcon Berlin 20222022-07-06
Builds a Watch OS SoundCloud client and implements the login flow end to end: Compose screen -> ViewModel with coroutines -> wear client callback wrapped as…
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Community Day Kickoffdroidcon Berlin 20212021-10-20
Overview of the Community Day process with concrete actions: where to submit sessions, how to vote on talks, and how remote audience joins via Zoom and the…
Organiser
The Power of TypesKotlinConf 20192019-12-04
Claims that Kotlin null-safety and type inference push many bugs to compile time, with concrete examples: replacing raw longs/strings with Time, Point and…
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TDD on AndroidDevFest Gorky 20192019-11-15
Argues that a real Android app can be developed test first by separating UI from business logic, showing a working login flow built with ViewModel and…
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Effective Unit testing with KotlinAndroid Makers 20192019-04-23
Forty minutes of live coding shows concrete recipes: replace JUnit asserts with Kluent assertions, prefer Mockito-Kotlin or MockK / Mockito-Kotlin for cleaner…
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TDD on Android: Why and how?Øredev 20182018-11-19
We have all heard about TDD: Test Driven Development. It produces better code and leads to fewer bugs. But, in our daily Android lives, why aren’t we doing it?…
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Junit5: the next gen of testing, don't stay behinddroidCon NYC 20182018-08-27
Explains why JUnit 5 actually rewrites execution: it splits platform, Jupiter API and a vintage engine so JUnit4 tests keep running; shows concrete features…
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Comparing DI frameworks & internalsMobius 2017 Piter2017-04-21
Deep dive comparing Dagger 2 vs Toothpick: Dagger uses annotation processing to generate a static compile-time graph with compile-time scope verification…
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Kotlin all the... tests!Mobius 2017 Piter2017-04-21
Argues that the easiest way to add Kotlin to a Java codebase is to start with unit tests and shows a working migration: Gradle config changes, mixed…
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