I help software developers become AI engineers. 15+ years in the software industry, 12,000+ learners worldwide.https://www.lukaslechner.com/https://www.lukaslechner.com/from-android-to-ai-engineering/https://www.lukaslechner.com/from-android-to-ai-engineering/From “Coroutines & Flow guy” to backend developer to AI Engineer: why I went all in on AI Engineering and released my new course, AI Engineering Fundamentals.Wed, 22 Jul 2026 00:00:00 GMThttps://www.lukaslechner.com/my-coroutines-course-just-got-a-big-update-kotlin-flow-for-android-development/https://www.lukaslechner.com/my-coroutines-course-just-got-a-big-update-kotlin-flow-for-android-development/Six additional hours of video content about Kotlin Flow, making my Coroutines course 15 hours long in total.Mon, 21 Nov 2022 00:00:00 GMThttps://www.lukaslechner.com/7-common-mistakes-you-might-be-making-when-using-kotlin-coroutines/https://www.lukaslechner.com/7-common-mistakes-you-might-be-making-when-using-kotlin-coroutines/Kotlin Coroutines simplify asynchronous and concurrent code — but there are some common mistakes many developers make when using them.Fri, 08 Jan 2021 00:00:00 GMThttps://www.lukaslechner.com/coroutines-exception-handling-cheat-sheet/https://www.lukaslechner.com/coroutines-exception-handling-cheat-sheet/The six most important points for implementing appropriate exception handling in coroutine-based code. Read the article or download the PDF.Wed, 28 Oct 2020 00:00:00 GMThttps://www.lukaslechner.com/my-first-online-course-mastering-kotlin-coroutines-for-android-development-is-now-available/https://www.lukaslechner.com/my-first-online-course-mastering-kotlin-coroutines-for-android-development-is-now-available/After more than 6 months of really hard work, I finally released my very first online course: Mastering Kotlin Coroutines for Android Development.Fri, 16 Oct 2020 00:00:00 GMThttps://www.lukaslechner.com/why-exception-handling-with-kotlin-coroutines-is-so-hard-and-how-to-successfully-master-it/https://www.lukaslechner.com/why-exception-handling-with-kotlin-coroutines-is-so-hard-and-how-to-successfully-master-it/Why exception handling is one of the hardest parts of learning Coroutines, and the key points you need to master it.Fri, 28 Aug 2020 00:00:00 GMThttps://www.lukaslechner.com/how-to-run-an-expensive-calculation-with-kotlin-coroutines-on-the-android-main-thread-without-freezing-the-ui/https://www.lukaslechner.com/how-to-run-an-expensive-calculation-with-kotlin-coroutines-on-the-android-main-thread-without-freezing-the-ui/On Android, you should usually perform CPU-intensive tasks on a background thread. Otherwise, if we perform them on the main thread, the UI freezes and gets unresponsive.Tue, 02 Jun 2020 00:00:00 GMThttps://www.lukaslechner.com/do-i-need-to-call-suspend-functions-of-retrofit-and-room-on-a-background-thread/https://www.lukaslechner.com/do-i-need-to-call-suspend-functions-of-retrofit-and-room-on-a-background-thread/After publishing my open source project about Coroutines on Android, which currently includes 16 of the most common, real-world use cases of using Coroutines in an Android app…Fri, 29 May 2020 00:00:00 GMThttps://www.lukaslechner.com/understanding-kotlin-coroutines-with-this-mental-model/https://www.lukaslechner.com/understanding-kotlin-coroutines-with-this-mental-model/The building blocks that help you form a solid mental model of what coroutines are and how they really work.Thu, 14 May 2020 00:00:00 GMThttps://www.lukaslechner.com/comparing-kotlin-coroutines-with-callbacks-and-rxjava/https://www.lukaslechner.com/comparing-kotlin-coroutines-with-callbacks-and-rxjava/I am currently investing a lot of time in learning about Kotlin Coroutines 🎓.Fri, 01 May 2020 00:00:00 GMThttps://www.lukaslechner.com/kotlin-coroutines-use-cases-on-android/https://www.lukaslechner.com/kotlin-coroutines-use-cases-on-android/For the last couple of weeks, I worked really hard on a new open-source project called Kotlin Coroutines – Use Cases on Android.Fri, 17 Apr 2020 00:00:00 GMThttps://www.lukaslechner.com/do-we-still-need-leakcanary-now-that-android-studio-3-6-has-memory-leak-detection/https://www.lukaslechner.com/do-we-still-need-leakcanary-now-that-android-studio-3-6-has-memory-leak-detection/In February 2020, Google released version 3.6 of Android Studio. It includes a new “Memory Leak Detection” feature.Fri, 28 Feb 2020 00:00:00 GMThttps://www.lukaslechner.com/learnings-from-kotlinconf-2019/https://www.lukaslechner.com/learnings-from-kotlinconf-2019/I attended KotlinConf for the first time this year and was really excited to fly to Copenhagen and see what’s going on around Kotlin.Thu, 12 Dec 2019 00:00:00 GMThttps://www.lukaslechner.com/slides-from-my-presentation-experiments-with-kotlin-multiplatform/https://www.lukaslechner.com/slides-from-my-presentation-experiments-with-kotlin-multiplatform/I talked about Kotlin Multiplatform at the Android Heads Vienna Meetup on April, 4th 2019.Fri, 05 Apr 2019 00:00:00 GMThttps://www.lukaslechner.com/learnings-from-droidcon-london-2018/https://www.lukaslechner.com/learnings-from-droidcon-london-2018/I attended Droidcon London on the 27th and 28th of October 2018. I made it a habit to write a blogpost about all the things I learned after every conference.Sat, 03 Nov 2018 00:00:00 GMThttps://www.lukaslechner.com/experiments-with-android-workmanager-our-new-reliable-assistant-for-deferrable-background-work/https://www.lukaslechner.com/experiments-with-android-workmanager-our-new-reliable-assistant-for-deferrable-background-work/At Google IO 2018, a new library from the Architecture Components of Android Jetpack, called Android WorkManager was presented.Fri, 19 Oct 2018 00:00:00 GMThttps://www.lukaslechner.com/droidcon-vienna-2018-recap/https://www.lukaslechner.com/droidcon-vienna-2018-recap/This is a short recap of Droidcon Vienna, which took place on September the 21st and 22nd of 2018.Fri, 28 Sep 2018 00:00:00 GMThttps://www.lukaslechner.com/slides-from-my-presentation-droidcon-vienna-2018/https://www.lukaslechner.com/slides-from-my-presentation-droidcon-vienna-2018/I gave a presentation about “How Effective Java influenced Kotlin” at this year’s Droidcon in Vienna. Here are the slides!Sat, 22 Sep 2018 00:00:00 GMThttps://www.lukaslechner.com/slides-from-my-presentation-kotlin-night-brussels-2017/https://www.lukaslechner.com/slides-from-my-presentation-kotlin-night-brussels-2017/I spoke at the Kotlin Night in Brussels about “How Effective Java influenced Kotlin”. Here are the slides of my presentation.Wed, 01 Nov 2017 00:00:00 GMThttps://www.lukaslechner.com/how-effective-java-may-have-influenced-the-design-of-kotlin-part-2/https://www.lukaslechner.com/how-effective-java-may-have-influenced-the-design-of-kotlin-part-2/This is the second part of the blog series about how the book “Effective Java” may have influenced Kotlin’s design.Sat, 28 Jan 2017 00:00:00 GMThttps://www.lukaslechner.com/how-effective-java-influenced-the-design-of-kotlin-part-1/https://www.lukaslechner.com/how-effective-java-influenced-the-design-of-kotlin-part-1/Java is a great programming language but has some known flaws, common pitfalls and not-so-great elements that have been inherited from its early days (1.0 got released in 1995…Wed, 28 Dec 2016 00:00:00 GMThttps://www.lukaslechner.com/4-things-i-learned-reading-code-complete-2/https://www.lukaslechner.com/4-things-i-learned-reading-code-complete-2/Code Complete 2 from Steve McConnell surely belongs to one of the bibles of software development.Sun, 11 Dec 2016 00:00:00 GMT