Alejandro Serrano Mena
@serranofp.com
👨💻 Researcher @ Kotlin Evolution @ JetBrains
🧙♂️ Passionate about FP (mostly Arrow & Haskell)
📚 Author of 4 books
🧙♂️ Passionate about FP (mostly Arrow & Haskell)
📚 Author of 4 books
Reposted by Alejandro Serrano Mena
📢 Rare opportunity: my team is hiring! We're looking for a new Developer Advocate to cover server-side Kotlin, focusing on Spring.
If you love Spring, Kotlin, and their communities, this might just be for you.
Learn more and apply here:
If you love Spring, Kotlin, and their communities, this might just be for you.
Learn more and apply here:
Kotlin Developer Advocate
Amsterdam, Netherlands; Berlin, Germany; Dubai, United Arab Emirates; Limassol, Cyprus; London, United Kingdom; Madrid, Spain; Munich, Germany; Prague, Czech Republic
job-boards.eu.greenhouse.io
November 11, 2025 at 3:25 PM
📢 Rare opportunity: my team is hiring! We're looking for a new Developer Advocate to cover server-side Kotlin, focusing on Spring.
If you love Spring, Kotlin, and their communities, this might just be for you.
Learn more and apply here:
If you love Spring, Kotlin, and their communities, this might just be for you.
Learn more and apply here:
Reposted by Alejandro Serrano Mena
⏳ Just three weeks left to submit your talk for KotlinConf’26!
👉 https://sessionize.com/kotlinconf-2026/
“Don’t forget that we also accept lightning talks! If you feel like your content would have to be padded to fill a regular session, it might be more enjoyable as a lightning talk.” – @zsmb.co
👉 https://sessionize.com/kotlinconf-2026/
“Don’t forget that we also accept lightning talks! If you feel like your content would have to be padded to fill a regular session, it might be more enjoyable as a lightning talk.” – @zsmb.co
November 10, 2025 at 4:50 PM
⏳ Just three weeks left to submit your talk for KotlinConf’26!
👉 https://sessionize.com/kotlinconf-2026/
“Don’t forget that we also accept lightning talks! If you feel like your content would have to be padded to fill a regular session, it might be more enjoyable as a lightning talk.” – @zsmb.co
👉 https://sessionize.com/kotlinconf-2026/
“Don’t forget that we also accept lightning talks! If you feel like your content would have to be padded to fill a regular session, it might be more enjoyable as a lightning talk.” – @zsmb.co
Taking a break from high level languages 🎮
November 9, 2025 at 1:41 PM
Taking a break from high level languages 🎮
Reposted by Alejandro Serrano Mena
There's less than a month left to submit your talk ideas to KotlinConf 2026! Why not do it today?
KotlinConf 2026: Call for Speakers
KotlinConf is an official conference by JetBrains. It is devoted to the Kotlin programming language and is the place for the community to gather and d...
sessionize.com
November 3, 2025 at 4:07 PM
There's less than a month left to submit your talk ideas to KotlinConf 2026! Why not do it today?
Arrow 2.2.0 is out! arrow-kt.io/community/bl...
- Raise with context parameters
- More DSLs for concurrency,
- "At most once" for Eval,
- New integration with Result4k
- Raise with context parameters
- More DSLs for concurrency,
- "At most once" for Eval,
- New integration with Result4k
Arrow 2.2.0 | Arrow
Arrow 2.2.0 is out, with improved and new functionality.
arrow-kt.io
November 1, 2025 at 4:20 PM
Arrow 2.2.0 is out! arrow-kt.io/community/bl...
- Raise with context parameters
- More DSLs for concurrency,
- "At most once" for Eval,
- New integration with Result4k
- Raise with context parameters
- More DSLs for concurrency,
- "At most once" for Eval,
- New integration with Result4k
Reposted by Alejandro Serrano Mena
The Call for Speakers for KotlinConf 2026 is still open! I'm not exaggerating when I say it's *the* Kotlin event of the year. Please submit to the CFP! Being a speaker is a really exciting way to experience KotlinConf, and share what you know! ❤️ sessionize.com/kotlinconf-2...
October 29, 2025 at 8:48 AM
The Call for Speakers for KotlinConf 2026 is still open! I'm not exaggerating when I say it's *the* Kotlin event of the year. Please submit to the CFP! Being a speaker is a really exciting way to experience KotlinConf, and share what you know! ❤️ sessionize.com/kotlinconf-2...
Reposted by Alejandro Serrano Mena
Had an amazing time at #LambdaWorld 25!
Gave 2 workshops with @serranofp.com about @kotlinlang.org. Had great chats about Kotlin not the server, for FP, Kotlin Notebooks, @jetbrains.com and @intellijidea.com 😍
You can find the workshops here: jb.gg/tj9qf6
Hope to see you all next year!
Gave 2 workshops with @serranofp.com about @kotlinlang.org. Had great chats about Kotlin not the server, for FP, Kotlin Notebooks, @jetbrains.com and @intellijidea.com 😍
You can find the workshops here: jb.gg/tj9qf6
Hope to see you all next year!
GitHub - nomisRev/lambda-world-2025-crafting-elegant-dsls-in-kotlin: Lambda World 2025 Workshop by Alejandro Serrano & Simon Vergauwen about building DSLs in Kotlin
Lambda World 2025 Workshop by Alejandro Serrano & Simon Vergauwen about building DSLs in Kotlin - nomisRev/lambda-world-2025-crafting-elegant-dsls-in-kotlin
jb.gg
October 27, 2025 at 8:45 AM
Had an amazing time at #LambdaWorld 25!
Gave 2 workshops with @serranofp.com about @kotlinlang.org. Had great chats about Kotlin not the server, for FP, Kotlin Notebooks, @jetbrains.com and @intellijidea.com 😍
You can find the workshops here: jb.gg/tj9qf6
Hope to see you all next year!
Gave 2 workshops with @serranofp.com about @kotlinlang.org. Had great chats about Kotlin not the server, for FP, Kotlin Notebooks, @jetbrains.com and @intellijidea.com 😍
You can find the workshops here: jb.gg/tj9qf6
Hope to see you all next year!
Reposted by Alejandro Serrano Mena
You can find the workshop about Pure Functions, Powerful Effects, you can find it here: jb.gg/8obvnt
October 27, 2025 at 8:46 AM
You can find the workshop about Pure Functions, Powerful Effects, you can find it here: jb.gg/8obvnt
Reposted by Alejandro Serrano Mena
Kotlin 2.2.21 and 2.2.20 have a lot goodies in them. In my video, I'm looking at the highlights! www.youtube.com/watch?v=QWpp...
What's new in Kotlin 2.2.21 (and 2.2.20!)
YouTube video by Kotlin by JetBrains
www.youtube.com
October 23, 2025 at 2:00 PM
Kotlin 2.2.21 and 2.2.20 have a lot goodies in them. In my video, I'm looking at the highlights! www.youtube.com/watch?v=QWpp...
Reposted by Alejandro Serrano Mena
If you're not on a Kotlin 2.x version yet: what's your blocker for upgrading?
October 21, 2025 at 2:23 PM
If you're not on a Kotlin 2.x version yet: what's your blocker for upgrading?
Three of the top educators in the @kotlinlang.org community discussing coroutines 💜 for two hours! 🤯
A conversation around Kotlin coroutines 💜
@sebi.io, @zsmb.co, and @marcinmoskala.bsky.social spent two glorious hours exploring coroutines in depth.
🎙️ If you love Kotlin, you won't want to miss this episode: www.youtube.com/watch?v=1zY4...
@sebi.io, @zsmb.co, and @marcinmoskala.bsky.social spent two glorious hours exploring coroutines in depth.
🎙️ If you love Kotlin, you won't want to miss this episode: www.youtube.com/watch?v=1zY4...
Discussing Kotlin Coroutines with Marcin Moskała | Talking Kotlin 141
YouTube video by Kotlin by JetBrains
www.youtube.com
October 21, 2025 at 10:18 AM
Three of the top educators in the @kotlinlang.org community discussing coroutines 💜 for two hours! 🤯
Reposted by Alejandro Serrano Mena
A conversation around Kotlin coroutines 💜
@sebi.io, @zsmb.co, and @marcinmoskala.bsky.social spent two glorious hours exploring coroutines in depth.
🎙️ If you love Kotlin, you won't want to miss this episode: www.youtube.com/watch?v=1zY4...
@sebi.io, @zsmb.co, and @marcinmoskala.bsky.social spent two glorious hours exploring coroutines in depth.
🎙️ If you love Kotlin, you won't want to miss this episode: www.youtube.com/watch?v=1zY4...
Discussing Kotlin Coroutines with Marcin Moskała | Talking Kotlin 141
YouTube video by Kotlin by JetBrains
www.youtube.com
October 21, 2025 at 4:44 AM
A conversation around Kotlin coroutines 💜
@sebi.io, @zsmb.co, and @marcinmoskala.bsky.social spent two glorious hours exploring coroutines in depth.
🎙️ If you love Kotlin, you won't want to miss this episode: www.youtube.com/watch?v=1zY4...
@sebi.io, @zsmb.co, and @marcinmoskala.bsky.social spent two glorious hours exploring coroutines in depth.
🎙️ If you love Kotlin, you won't want to miss this episode: www.youtube.com/watch?v=1zY4...
Reposted by Alejandro Serrano Mena
I'm super proud of this webinar for underrepresented communities to CFP for KotlinConf. It has been a goal of mine to have this type of encouraging event since I started at JetBrains, and now you can watch the video 🥰
www.youtube.com/watch?v=cTfH...
www.youtube.com/watch?v=cTfH...
Your Voice Belongs Here: Creating Compelling KotlinConf Proposals
YouTube video by Kotlin by JetBrains
www.youtube.com
October 15, 2025 at 2:17 PM
I'm super proud of this webinar for underrepresented communities to CFP for KotlinConf. It has been a goal of mine to have this type of encouraging event since I started at JetBrains, and now you can watch the video 🥰
www.youtube.com/watch?v=cTfH...
www.youtube.com/watch?v=cTfH...
I've written a small blog post about how context parameters change API design in Kotlin serranofp.com/blog/context...
Feedback and discussion is more than welcome!
Feedback and discussion is more than welcome!
Context parameters and API design
serranofp.com
October 14, 2025 at 2:13 PM
I've written a small blog post about how context parameters change API design in Kotlin serranofp.com/blog/context...
Feedback and discussion is more than welcome!
Feedback and discussion is more than welcome!
Reposted by Alejandro Serrano Mena
Context parameters are almost here, let's try migrating a real codebase to them and see what happens!
If you've heard of them but haven't had the time to dive yet, follow me to discover what they can and can't do right now, ahead of their final stabilization.
ivan.canet.dev/blog/2025/10...
If you've heard of them but haven't had the time to dive yet, follow me to discover what they can and can't do right now, ahead of their final stabilization.
ivan.canet.dev/blog/2025/10...
I tried context parameters, Kotlin's new multi-receiver extension functions - Ivan “CLOVIS” Canet
Software engineering, open source and computer security
ivan.canet.dev
October 13, 2025 at 8:55 PM
Context parameters are almost here, let's try migrating a real codebase to them and see what happens!
If you've heard of them but haven't had the time to dive yet, follow me to discover what they can and can't do right now, ahead of their final stabilization.
ivan.canet.dev/blog/2025/10...
If you've heard of them but haven't had the time to dive yet, follow me to discover what they can and can't do right now, ahead of their final stabilization.
ivan.canet.dev/blog/2025/10...
Reposted by Alejandro Serrano Mena
Hi @devoxx.com!
I’m at the @jetbrains.com booth this week.
Be sure to come say hi if you want to hear about Kotlin! 😬
I’m at the @jetbrains.com booth this week.
Be sure to come say hi if you want to hear about Kotlin! 😬
Hello @devoxx.com Belgium!
Drop by the @jetbrains.com booth to chat about Spring Data, Spring 7, and what’s coming next in IntelliJ IDEA.
🎤 At 18:20, @maritvandijk.bsky.social will share IntelliJ IDEA tips to boost your productivity.
Drop by the @jetbrains.com booth to chat about Spring Data, Spring 7, and what’s coming next in IntelliJ IDEA.
🎤 At 18:20, @maritvandijk.bsky.social will share IntelliJ IDEA tips to boost your productivity.
October 8, 2025 at 5:55 AM
Hi @devoxx.com!
I’m at the @jetbrains.com booth this week.
Be sure to come say hi if you want to hear about Kotlin! 😬
I’m at the @jetbrains.com booth this week.
Be sure to come say hi if you want to hear about Kotlin! 😬
Reposted by Alejandro Serrano Mena
We just published the 1.0.0-rc01 release for Compose Hot Reload! With this, we are quickly approaching our first stable release.
Have you tried Hot Reload yet? Let us know how it's working for you!
Have you tried Hot Reload yet? Let us know how it's working for you!
Release v1.0.0-rc01 · JetBrains/compose-hot-reload
Release summary
🔥🎆 The project is promoted to the 'RC' stage.
We are still working on convenient tooling in IntelliJ and Android Studio and will continue experimenting there. The 'core ...
github.com
October 6, 2025 at 12:40 PM
We just published the 1.0.0-rc01 release for Compose Hot Reload! With this, we are quickly approaching our first stable release.
Have you tried Hot Reload yet? Let us know how it's working for you!
Have you tried Hot Reload yet? Let us know how it's working for you!
Reposted by Alejandro Serrano Mena
Published a KEEP on suspend lambdas and anonymous functions: github.com/Kotlin/KEEP/...
github.com
October 6, 2025 at 11:09 AM
Published a KEEP on suspend lambdas and anonymous functions: github.com/Kotlin/KEEP/...
Reposted by Alejandro Serrano Mena
Better immutability in Kotlin with Valhalla
www.youtube.com/watch?v=6jam...
#kotlin #programming #jvm #jvmls
www.youtube.com/watch?v=6jam...
#kotlin #programming #jvm #jvmls
Better immutability in Kotlin with Valhalla #JVMLS
YouTube video by Java
www.youtube.com
October 2, 2025 at 11:19 PM
Better immutability in Kotlin with Valhalla
www.youtube.com/watch?v=6jam...
#kotlin #programming #jvm #jvmls
www.youtube.com/watch?v=6jam...
#kotlin #programming #jvm #jvmls
Reposted by Alejandro Serrano Mena
We now have a dedicated Bluesky account!
In the coming weeks we'll be automating release announcements there.
In the coming weeks we'll be automating release announcements there.
October 2, 2025 at 5:31 PM
We now have a dedicated Bluesky account!
In the coming weeks we'll be automating release announcements there.
In the coming weeks we'll be automating release announcements there.
Reposted by Alejandro Serrano Mena
The photos of our first edition are up over at ktconf.be/photos
Feeding your FOMO so you decide to come next year. 😬
Feeding your FOMO so you decide to come next year. 😬
Photos KtConf 2025
View all photos from our amazing event
ktconf.be
September 25, 2025 at 4:25 AM
The photos of our first edition are up over at ktconf.be/photos
Feeding your FOMO so you decide to come next year. 😬
Feeding your FOMO so you decide to come next year. 😬
One of my outcomes of @ktconf.bsky.social is an improved version of my "FIR Tree" plug-in, that now can show the statements/implications in the Control Flow Graph
plugins.jetbrains.com/plugin/23270...
plugins.jetbrains.com/plugin/23270...
September 20, 2025 at 12:19 PM
One of my outcomes of @ktconf.bsky.social is an improved version of my "FIR Tree" plug-in, that now can show the statements/implications in the Control Flow Graph
plugins.jetbrains.com/plugin/23270...
plugins.jetbrains.com/plugin/23270...
Reposted by Alejandro Serrano Mena
Couldn’t be happier with yesterday’s 1st edition of KTConf.be.
Some quick stats:
We had a total of 59 Kotlin fans attend, including 8 speakers, of which 5 international ones.
Big shout out to Kunlabora, Triple D, DPG Media, PTV Logistics and of course @jetbrains.com for their amazing support.
Some quick stats:
We had a total of 59 Kotlin fans attend, including 8 speakers, of which 5 international ones.
Big shout out to Kunlabora, Triple D, DPG Media, PTV Logistics and of course @jetbrains.com for their amazing support.
KTConf 2025
Belgium's Premier Kotlin Conference
KTConf.be
September 20, 2025 at 8:02 AM
Couldn’t be happier with yesterday’s 1st edition of KTConf.be.
Some quick stats:
We had a total of 59 Kotlin fans attend, including 8 speakers, of which 5 international ones.
Big shout out to Kunlabora, Triple D, DPG Media, PTV Logistics and of course @jetbrains.com for their amazing support.
Some quick stats:
We had a total of 59 Kotlin fans attend, including 8 speakers, of which 5 international ones.
Big shout out to Kunlabora, Triple D, DPG Media, PTV Logistics and of course @jetbrains.com for their amazing support.
Reposted by Alejandro Serrano Mena
Today is @ktconf.bsky.social, the first Kotlin conference in Belgium! 🔥
I’m super exciting being here, and talking everyone’s ear off about Kotlin.
Today I’m talking with my colleague Maria on how to “Koog your own AI! Delicious recipes” 😋
I’m super exciting being here, and talking everyone’s ear off about Kotlin.
Today I’m talking with my colleague Maria on how to “Koog your own AI! Delicious recipes” 😋
September 19, 2025 at 8:13 AM
Today is @ktconf.bsky.social, the first Kotlin conference in Belgium! 🔥
I’m super exciting being here, and talking everyone’s ear off about Kotlin.
Today I’m talking with my colleague Maria on how to “Koog your own AI! Delicious recipes” 😋
I’m super exciting being here, and talking everyone’s ear off about Kotlin.
Today I’m talking with my colleague Maria on how to “Koog your own AI! Delicious recipes” 😋
Reposted by Alejandro Serrano Mena
Thinking about submitting a KotlinConf talk? ✨
@pamelaahill.bsky.social and @cheuk.dev are hosting a livestream to help you turn your idea into a compelling KotlinConf proposal.
Save the date: kotl.in/live-oc25
Your voice belongs here.
@pamelaahill.bsky.social and @cheuk.dev are hosting a livestream to help you turn your idea into a compelling KotlinConf proposal.
Save the date: kotl.in/live-oc25
Your voice belongs here.
“Your Voice Belongs Here: Creating Compelling KotlinConf Proposals” 🎤
This livestream is for speakers from underrepresented groups in tech ready to level up! @pamelaahill.bsky.social and @cheuk.dev will share how to turn your Kotlin story into a strong proposal.
➡️ https://kotl.in/live-oc25
This livestream is for speakers from underrepresented groups in tech ready to level up! @pamelaahill.bsky.social and @cheuk.dev will share how to turn your Kotlin story into a strong proposal.
➡️ https://kotl.in/live-oc25
Live Webinar -
info.jetbrains.com
September 17, 2025 at 4:40 AM
Thinking about submitting a KotlinConf talk? ✨
@pamelaahill.bsky.social and @cheuk.dev are hosting a livestream to help you turn your idea into a compelling KotlinConf proposal.
Save the date: kotl.in/live-oc25
Your voice belongs here.
@pamelaahill.bsky.social and @cheuk.dev are hosting a livestream to help you turn your idea into a compelling KotlinConf proposal.
Save the date: kotl.in/live-oc25
Your voice belongs here.