Practical Kotlin Deep Dive: Unlocking the 'How' and 'Why' behind Kotlin fundamentals and internal mechanisms. https://leanpub.com/kotlin-deep-dive by Jaewoong is the featured book on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Android #Kotlin #Engineering #Software #SoftwareEngineering

Find it on Leanpub!

Kotlin for developers https://leanpub.com/set/leanpub/kotlin_for_developers by Marcin Moskała is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #Kotlin #ComputerProgramming

Practical Kotlin Deep Dive: Unlocking the 'How' and 'Why' behind Kotlin fundamentals and internal mechanisms. https://leanpub.com/kotlin-deep-dive by Jaewoong is the featured book on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Android #Kotlin #Engineering #Software #SoftwareEngineering

Find it on Leanpub!

Effective Kotlin bundle https://leanpub.com/b/effectivekotlinbundle by Marcin Moskała is the featured ebook bundle 📚 on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Engineering #Kotlin

The package of the most essential books for Kotlin developers, to become great developers. Effective Kotlin and Kotlin Coroutines by Marcin Moskała are both famous positions, well known and commonly recommended.

Find it on Leanpub!

My last blog post of the year: Next level Kotlin support in Spring Boot 4.
https://spring.io/blog/2025/12/18/next-level-kotlin-support-in-spring-boot-4

#spring #kotlin

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Spring and Kotlin logos

Kotlin Coroutines by Marcin Moskała is on sale on Leanpub! Its suggested price is $29.99; get it for $15.99 with this coupon: https://leanpub.com/sh/XhxHTWDA #ComputerProgramming #Kotlin

Compose & Android Deep Dive Package (Jetpack Compose internals + Manifest Android Interview) https://leanpub.com/b/android-deep-dive-package by Jaewoong and Jorge Castillo is the featured bundle of ebooks 📚 on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Android #Kotlin #Engineering #Software #SoftwareEngineering

The following 2 books are included in this bundle...
Manifest Android Interview and Jetpack Compose internals

Find it on Leanpub!

Big Kotlin pack https://leanpub.com/b/kotlin_mm by Marcin Moskała is the featured bundle of ebooks 📚 on the Leanpub homepage! https://leanpub.com #Kotlin #Android #Java #ComputerProgramming #Engineering

The following 5 books are included in this bundle...
Kotlin Essentials, Functional Kotlin, Advanced Kotlin, Kotlin Coroutines, and Effective Kotlin

Find it on Leanpub!

If you are a full stack engineer with 5+ years of experience in either Frontend (#TypeScript + #React) or Backend development (#Python or #Kotlin) check out this position: https://careers.nordicsemi.com/jobs/6897020-full-stack-engineer-typescript-python?promotion=1746060-trackable-share-link-e253c407-6d48-46d3-8e76-bf52f53d81f2 ... and maybe one day you will be a hero that made a robot walk again?!

Unfortunately this position is not available for remote applicants.

As always with these things, it took some time from first working prototype to something that I'm not completely embarrassed to show...
So, here's my #Kotlin symbol processing playground - The server-side framework I would have wanted in 2008:

https://codeberg.org/dtanzer/kmultipage

The "docs" subproject contains some interesting usages, so use "./gradlew :docs:run" to try it.

Kotlin Coroutines by Marcin Moskała is on sale on Leanpub! Its suggested price is $29.99; get it for $15.99 with this coupon: https://leanpub.com/sh/IvWyVZaR #ComputerProgramming #Kotlin

Kotlin: An Illustrated Guide: The fun way to learn Kotlin programming, one concept at a time! https://leanpub.com/kotlin-illustrated by Dave Leeds is the featured book on the Leanpub homepage! https://leanpub.com #Kotlin #programming

Find it on Leanpub!

🚀 #ApproveJ v1.0 ("ONE-POINT-ZERO") was just released! 🎉🥳🍾

🧹 all deprecated methods have been removed
🪲 approving by file is now also possible in parameterized tests
📖 minor updates in the manual

https://github.com/mkutz/ApproveJ/releases/tag/v1.0

#approvaltesting #snapshottesting #java #kotlin #unittesting #release

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Release banner for v1.0

I have upgraded Spring PetKlinik, my Kotlin fullstack variant of the original Spring Petclinic, to Spring Boot 4.0.0 (before it was using snapshots). https://github.com/sdeleuze/spring-petklinik

#spring #kotlin

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Spring PetKlinik logo

Done with the (ugly) spike, now reimplementing my #Kotlin #SymbolProcessing project, with a more sensible design, and with more Tests and TDD (*).

It's great fun when one already knows what works and what does not, and design is the main challenge, not the functionality (not anymore).

(*) I'm still finding it hard to test some parts of the symbol processor, since it runs in the compiler. But that's not a big problem for me right now.

Big Kotlin pack https://leanpub.com/b/kotlin_mm by Marcin Moskała is the featured bundle of ebooks 📚 on the Leanpub homepage! https://leanpub.com #Kotlin #Android #Java #ComputerProgramming #Engineering

The following 5 books are included in this bundle...

Kotlin Essentials, Functional Kotlin, Advanced Kotlin, Kotlin Coroutines, and Effective Kotlin

Find it on Leanpub!

Yesterday, I started to play with #Kotlin symbol processing again, after I didn't manage to create something working ~2 years ago.

This time, I managed to create a proof-of-concept of something I wanted to work on for a long time!

Pretty messy code right now, will clean it up a bit and add more tests, then I'll push it to Codeberg.

Kotlin Coroutines by Marcin Moskała is on sale on Leanpub! Its suggested price is $29.99; get it for $15.99 with this coupon: https://leanpub.com/sh/THy2qgD6 #ComputerProgramming #Kotlin

Manifest Android Interview: The ultimate guide to cracking Android technical interviews https://leanpub.com/manifest-android-interview by Jaewoong is the featured book on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Android #Kotlin #Engineering #Software #SoftwareEngineering

Find it on @leanpub!

Kotlin for developers http://leanpub.com/set/leanpub/kotlin_for_developers by Marcin Moskała is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #Kotlin #ComputerProgramming

Kotlin for developers https://leanpub.com/set/leanpub/kotlin_for_developers by Marcin Moskała is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #Kotlin #ComputerProgramming

Kotlin Coroutines by Marcin Moskała is on sale on Leanpub! Its suggested price is $29.99; get it for $15.99 with this coupon: https://leanpub.com/sh/INa5B6Gz #ComputerProgramming #Kotlin

Jetpack Compose internals by Jorge Castillo is on sale on Leanpub! Its suggested price is $49.99; get it for $17.50 with this coupon: https://leanpub.com/sh/lXFW9nD3 #Software #ComputerProgramming #Java #Kotlin #SoftwareArchitecture #SoftwareEngineering

Kotlin for developers http://leanpub.com/set/leanpub/kotlin_for_developers by Marcin Moskała is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #Kotlin #ComputerProgramming

Effective Kotlin bundle https://leanpub.com/b/effectivekotlinbundle by Marcin Moskała is the featured bundle of ebooks on the Leanpub homepage! https://leanpub.com #ComputerProgramming #Engineering #Kotlin

Kotlin Coroutines by Marcin Moskała is on sale on Leanpub! Its suggested price is $29.99; get it for $15.99 with this coupon: https://leanpub.com/sh/NvyAC2BG #ComputerProgramming #Kotlin

Kotlin Coroutines by Marcin Moskała is on sale on Leanpub! Its suggested price is $29.99; get it for $15.99 with this coupon: https://leanpub.com/sh/I7F9cWvi #ComputerProgramming #Kotlin

Kotlin for developers http://leanpub.com/set/leanpub/kotlin_for_developers by Marcin Moskała is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #Kotlin #ComputerProgramming #courses

🍃 #Spring Framework 7.0 RC1 is now available!

- Refinements for @⁠Retryable, RetryTemplate, & @⁠ConcurrencyLimit
- #Kotlin context propagation improvements
- API Versioning refinements
- #JUnit 6
- #Jackson 3

https://spring.io/blog/2025/10/16/spring-framework-7-0-0-RC1-available-now

Compose & Android Deep Dive Package (Jetpack Compose internals + Manifest Android Interview) by Jaewoong and Jorge Castillo is the featured bundle of ebooks 📚 on the Leanpub homepage! #ComputerProgramming #Android #Kotlin #Engineering #Software #SoftwareEngineering #books #ebooks

The following 2 books are included in this bundle...
Manifest Android Interview and Jetpack Compose internals

Find it on Leanpub!

Kotlin for developers http://leanpub.com/set/leanpub/kotlin_for_developers by Marcin Moskała is the featured Track of online courses on the Leanpub homepage! https://leanpub.com #Kotlin #ComputerProgramming #courses

This is the complete track to learn about essential Kotlin features and get ready for working in Kotlin in daily basis. It starts from essentials, and on the way reaches advanced topics like efficient collection processing or DSL creation.

Find it on Leanpub!

Jetpack Compose internals by Jorge Castillo is on sale on Leanpub! Its suggested price is $49.99; get it for $17.50 with this coupon: https://leanpub.com/sh/yj2lK8Mk #Software #ComputerProgramming #Java #Kotlin #SoftwareArchitecture #SoftwareEngineering

Big Kotlin pack https://leanpub.com/b/kotlin_mm by Marcin Moskała is the featured bundle of ebooks 📚 on the Leanpub homepage! https://leanpub.com #Kotlin #Android #Java #ComputerProgramming #Engineering #books #ebooks

Jetpack Compose internals by Jorge Castillo is on sale on Leanpub! Its suggested price is $49.99; get it for $17.50 with this coupon: https://leanpub.com/sh/ty7gdcLR #Software #ComputerProgramming #Java #Kotlin #SoftwareArchitecture #SoftwareEngineering