Sam Aaron turned the whole Code BEAM Europe audience into a live coded phone orchestra, playing synths on every phone with SuperSonic and Phoenix PubSub. ElixirConf EU 2027 Call for Talks is open until 15 December: sessionize.com/elixirconf-eu-… Watch: youtu.be/1zqeXkS3gAE

The Call for Talks for ElixirConf EU 2027 is open!

After Code BEAM Europe 2026, the next stop for the community is Lisbon, 22-23 April 2027. Got something to share about Elixir or the BEAM? Submit by 15 December: sessionize.com/elixirconf-eu-…

#ElixirConf #Elixir #BEAM

So what will Lisbon talk about? That’s up to you.

The ElixirConf EU 2027 Call for Talks is open until 15 Dec. 20 or 40 min slots, first-time speakers welcome.

Submit your talk: sessionize.com/elixirconf-eu-… #ElixirLang

@samaaron asked an LLM to build him a SuperCollider synth. It beeped. It worked. It wasn’t SuperCollider.

“A masquerading b*stard.”

From @samaaron’s Code BEAM Europe 2026 keynote “Notes on the Synthesis of Time”: youtube.com/watch?v=cw2U4J…

#CodeBEAM #LiveCoding #SonicPi

ElixirConf EU 2027 is getting closer. Follow elixirconf.eu or subscribe to the newsletter: elixirconf.eu/#newsletter

Watch the Code BEAM Europe 2026 opening keynote by Sam Aaron: Notes on the Synthesis of Time
Link to the video: youtu.be/cw2U4JWQJy8

"It really is just an amazing place to be." On the floor at Code BEAM Europe 2026, @samaaron captures what brings developers together: deep conversations around Erlang, Elixir, Gleam, and concurrent systems.

Thanks to everyone who joined us in Haarlem. See you next year!
6 #CodeSync #BEAM

Traditional Erlang records are just tuples under the hood, until OTP 29. Björn Gustavsson on native records, performance trade-offs, and future plans for OTP 30. Watch: youtu.be/LKMRtdGFX0k

One more thank you, now that we've had some sleep. Code BEAM Europe 2026 happened because these people got on stage and shared what they've built 💜 #CodeBEAM #Elixir

That's Code BEAM Europe 2026. Two days, two tracks, one Informal Zone, and an unusual amount of music for a programming conference. Thank you to Day 2's speakers 🧵 #CodeBEAM #Erlang

For years we've told each other to let it crash. @Expede closes Code BEAM Europe 2026 on Track 1 with 'Let It Disconnect: A Local-First Future'.

#CodeBEAM #LocalFirst

The Gleam Language Update, from the person who started Gleam: @louispilfold, Track 1, now. Whatever shipped this year, you're about to hear it first-hand.

#CodeBEAM #Gleam

"Let it crash" works, right up until it doesn't. Spoorthy Sridhara is on Track 2 with 'Self-Healing Systems and When They Fail'. Possibly the most honest title of the conference.

#CodeBEAM #OTP

Yesterday's talk was 'Don't Crash the BEAM'. Rustler's whole promise is the same idea, in Rust. Benedikt Reinartz (Statkraft) is on Track 1 with 'Rustler News and Road to 1.0'.

#CodeBEAM #Rust

Last coffee break of Code BEAM Europe 2026. Then: Benedikt Reinartz on Rustler's road to 1.0 (Track 1), Spoorthy Sridhara on when self-healing systems fail (Track 2), and Lightning Talks in the Informal Zone.

#CodeBEAM

Happening now at Code BEAM: Erlang's JIT on ARM32!

Luca Succi & @peerstr on bringing BeamAsm to embedded/IoT hardware, plus live GRiSP2 benchmarks. 

#CodeBEAM #Erlang #IoT

Elixir developers have had doctests for years. @garazdawi from the OTP team is on Track 1 with 'Exploring Doctests in Erlang'. Erlang catching up, or doing it differently?

#CodeBEAM #Erlang

Something unexpected is happening in the Informal Zone right now: @elbrujohalcon has taken over the room!

#CodeBEAM #BEAM

If AI writes most of the code, does the language still matter, or is it all about the runtime underneath? Iryna Kostiuk is on Track 2 with exactly that question.

#CodeBEAM #AI

SAFE, the security audit tool from Erlang Solutions, already speaks Erlang and Elixir. Robert Fiko is on Track 1 with what it took to teach it Gleam: 'Same Runtime, Different Language'.

#CodeBEAM #Gleam

Your AI assistant reads untrusted input for a living. Peter Ullrich and @maennchen_ are on Track 2 with 'Don't Get Pwned by AI Attacks'. Practical, and probably a little uncomfortable.

#CodeBEAM #Security

The Informal Zone is getting loud: Joseph Stewart with 'Weird Live Audio Coding: Making Noise with the BEAM'. The title promises weird. We trust it.

#CodeBEAM #LiveCoding

'Still Typing Erlang?' is a fair question in 2026. @robertoaloi, one of the ELP authors, works on Erlang developer experience at WhatsApp, and he's on Track 1 with DevX in the prompt era.

#CodeBEAM #Erlang

Day 2 of Code BEAM Europe, and one more thank you to everyone who made these two days possible: @ErlangSolutions, @EMQTech, @CloudAMQP, @AppSignal, Seventh State, Trifork, @9elements, @TheErlef and @ahrefs. #CodeBEAM #Erlang

Lunch 🍽️ Back at 13:30 with @robertoaloi on developer experience in the prompt era (Track 1), Peter Ullrich and @maennchen_ on AI attacks (Track 2), and weird live audio coding in the Informal Zone.

#CodeBEAM

Shuffling a list sounds like a solved problem. Raimo Niskanen from the OTP team is on Track 2 with 'Do the List Shuffle', and we suspect it's less simple than it looks.

#CodeBEAM #Erlang

Getting Erlang to keep time well enough to make music is harder than it sounds (sorry). Ellyse Cedeno and Cara Superlativo are generating sound live on Track 1, in a former concert hall, no less.

#CodeBEAM #Erlang

Informal Zone: @mraaroncruz with 'Be the Cluster: Raft by Hand, Then in ra'. The title says you're the cluster, so expect to play a node before you see the code. ra is the Raft library behind RabbitMQ's quorum queues.

#CodeBEAM #Erlang

A title that sounds worse than it is: 'Understanding Supervision: Killing Your Actors'. Kero van Gelder is on Track 2, explaining supervision by doing the one thing it exists to handle.

#CodeBEAM #Gleam

@erik_stenman wrote The BEAM Book, ran Tuesday's tutorial, and is now on Track 1 with 'Structuring Erlang Code with Application-Level Visibility'. If anyone has thought hard about how Erlang code should be laid out, it's him.

#CodeBEAM #Erlang

Ever wished you could see your supervision tree instead of imagining it? Guillaume Heu is on Track 2 with 'Asterism: an OTP Visualizer in Gleam'.

#CodeBEAM #Gleam

In the Informal Zone: Yutaka Kikuchi and Hideki Takase with 'Giocci Live', offloading computation across the edge in real time. The "Live" is in the title for a reason.

#CodeBEAM #Elixir

In-person attendees, have you spotted cool Alchemist Puzzles at Erlang Solutions/Trifork stand? To win them, solve the quiz canva.link/yaigcpy7nkk0avz
There's a draw today, all the people with 100% correct answers will get a chance to win one of the prizes!

#CodeBEAM

Happening now at Code BEAM: Chris Beck on "ATProto on Elixir"!

Elixir + Rust scaling ATProto's DataPlane to millions of users on a fraction of the resources. Live demo on stage right now.

#CodeBEAM #Erlang

Coffee break. At 10:50: @peerstr porting Erlang's JIT to ARM32 (Track 1), Guillaume Heu with an OTP visualizer written in Gleam (Track 2), and Giocci Live, edge computing in real time, in the Informal Zone.

#CodeBEAM

Keynote on Track 1: @josevalim, creator of Elixir, with 'Set-Theoretic Types from Scratch', built up from first principles, then a long Q&A. If types in Elixir have confused, excited or worried you, this is the room.

#CodeBEAM #Elixir

Day 2, Haarlem. First up at 9:10 on Track 1: @josevalim building set-theoretic types from scratch, with an extended Q&A. Bring the type question you've been saving up.

#CodeBEAM #Elixir

That's a wrap! Watch the highlights of Day 1 at Code BEAM Europe 2026!

Day 1 of Code BEAM Europe 2026, done. It opened with @samaaron on time and sound, ended with the Phone Orchestra, and fit Native Records, Lustre, AtomVM, LiveView hooks and a co-op Elixir shooter in between. Thank you to today's speakers 🧵 #CodeBEAM #Elixir

Talks are done for today. Drinks are in the Foyer 🥂 and the hallway track officially takes over. Come say hi, and find that speaker you meant to ask a question.

#CodeBEAM

Phones out, for once. @samaaron is back on Track 1 for 'The Phone Orchestra', an interactive evening session to close Day 1. Sound on, please.

#CodeBEAM #SonicPi

What's next for the Erlang Ecosystem Foundation? Dan Janowski is on Track 1 with 'The Erlang Ecosystem Frontier: Our Work Ahead'. If you've wondered how to get involved, these 20 minutes are for you.

#CodeBEAM #EEF

Developers say they hate marketing. Developers also star repos with good READMEs. Kamila Pokój (Gleam core team, marketing at Erlang Solutions) is on Track 2 with 'Reverse Engineering Marketing for Devs'. #CodeBEAM

#DevRel

Lightning Talks in the Informal Zone right now ⚡ They're not filmed or streamed, so whatever gets said in Van Beinum Zaal stays in Van Beinum Zaal.

#CodeBEAM

The terminal never really went away. Mauricio Cassola is on Track 1 with 'TUIs Everywhere', making the case for text interfaces in more places than you'd expect.

#CodeBEAM #Elixir

A new declarative language for the BEAM, from @aramallo, who also created Bondy. 'Saying What' is on Track 2 now.

#CodeBEAM #BEAM

Buttons, knobs, things you can actually touch. Lucas Sifoni is on Track 1 with 'From Pure Code to Physical Controls: Designing Hardware in Elixir'.

#CodeBEAM #Elixir

Second coffee break of the day. Back at 15:40 with Lucas Sifoni designing hardware in Elixir (Track 1), @aramallo and a new declarative language for the BEAM (Track 2), and more open space in the Informal Zone.

#CodeBEAM

If your team came to Elixir from Ruby, some habits came along for the ride. Travis Fantina is on Track 2 with 'Ruby Crimes in Elixir Codebases'. You may recognise a few.

#CodeBEAM #Elixir

Staying on Track 1 for more Lustre: Rebecca Reusch from the Lustre core team with 'Building Big Lustre Apps'. Basically the follow-up question to the last talk: what happens when it grows?

#CodeBEAM #Gleam

What if your frontend didn't need an API at all? @hayleighdotdev, who created Lustre, is on Track 1 with 'Ditch your API with Lustre Server Components and the Store Pattern'.

#CodeBEAM #Gleam