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Artwork for BEAM There, Done That

BEAM There, Done That

Plangora
Elixir
BEAM
Erlang
Whatsapp
Local First
TV Labs
Rust
Hologram
Bandit
Gleam
TLS (transport Layer Security)
Artificial Intelligence
Jit
Ash Framework
Phoenix
OTP
Native Records
Zig
Ericsson
Data Sovereignty

BEAM There, Done That is a podcast about building real systems with Elixir, Erlang, and the BEAM. We’ve built it before — distributed systems, fault‑tolerant services, event pipelines, real‑time apps, production nightmares, and the supervision trees that saved them. Each episode dives into practical lessons from shipping software on the BEAM: architecture decisions, scaling challenges, operational... more

PublishesWeeklyEpisodes34Founded8 months ago
Number of ListenersCategory
Technology

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Artwork for BEAM There, Done That

Latest Episodes

In 2017, Davide Bettio created AtomVM to run Erlang, Elixir and Gleam code on embedded devices with just a few kilobytes of memory. Fast forward to today, and Giacomo Cavalieri of the Gleam core team has built tooling that flashes a Gleam project ont... more

On Christmas Eve, the BEAM's scheduler throttled down to save power. A batch job arrived. A Christmas worth of XML took down all three failover nodes. The Klarna CEO called. Erik Stenman was already at his desk.

That incident sent him deep into the ... more

Every secure connection made from an Erlang, Elixir, or Gleam application runs through code she wrote. Most developers have never heard her name.

Ingela Andin has spent more than two decades on the OTP team at Ericsson, maintaining the TLS stack — t... more

Brex runs on Elixir. Klarna runs on Erlang. Mastercard is believed to use it. And most of the community that builds on these systems watches them with PromEx - a library written by today's guest.

Alex Koutmos has been in the Elixir ecosystem for ove... more

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Recent Guests

Erik Stenman
Erlang veteran, author of The BEAM Book, and builder of AI compute router Eldrim
Eldrim
Episode: Data Sovereignty & Local-First AI: Building Eldrim with Erik Stenman
Ingela Andin
TLS stack lead on Ericsson's OTP team
Ericsson
Episode: Ingela Andin on the TLS Stack Running Under Every BEAM App
Alex Koutmos
Author of Elixir for Finance, PromEx creator
PromEx, Elixir for Finance
Episode: Alex Koutmos on Elixir for Finance, Trading & Blockchain
Kip Cole
Developer focused on time, localization, and scheduling; creator of Agenda, Localize, and Tempo
Localize, Agenda, Tempo projects (Elixir/Erlang BEAM ecosystem)
Episode: Kip Cole on Time, Localization and Building Agenda
Tobias Pfeiffer
Benchmarking nerd; creator of Benchee; PragTob handle; Elixir/Ruby background
Supabase (real-time engineer, Elixir focus)
Episode: Is Your Elixir Code Actually Fast? Tobias Pfeiffer on Benchmarking
Louis Pilfold
Gleam maintainer and lead developer; the original Gleam founder
Gleam
Episode: Louis Pilfold on Building Gleam - Static Types on the BEAM
Roberto Aloi
Engineer focused on Erlang tooling and developer experience at WhatsApp
WhatsApp / Meta
Episode: How WhatsApp Fixed Erlang's Tooling Problem | Roberto Aloi & Michał Muskała
Michał Muskała
Engineer focusing on developer experience and type systems at WhatsApp
WhatsApp / Meta
Episode: How WhatsApp Fixed Erlang's Tooling Problem | Roberto Aloi & Michał Muskała
Davide Bettio
Creator of AtomVM and contributor to Erlang/BEAM on microcontrollers
AtomVM
Episode: Erlang on a Microcontroller: Davide Bettio & Paul Guyot on AtomVM

Hosts

Francesco Cesarini
Co-host of BEAM There, Done That; BEAM ecosystem contributor and author
Alan Wyma
Host of BEAM There, Done That; BEAM ecosystem advocate

Chart Rankings

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Apple Podcasts
#163
Belgium/Technology
Apple Podcasts
#219
Austria/Technology

Talking Points

Recent interactions between the hosts and their guests.

Data Sovereignty & Local-First AI: Building Eldrim with Erik Stenman
Q: If I'm a team putting AI into production, what do I get and what problem does it take off my plate?
Eldrim provides an AI API with jurisdiction controls, helps ensure requests stay within the selected area, and returns headers identifying where the request ran.
Data Sovereignty & Local-First AI: Building Eldrim with Erik Stenman
Q: Can you just walk us through these concepts so we make sure we don't lose any of the listeners on the way?
Stenman defines residency as the physical location of code or data, sovereignty as the legal authority associated with the compute provider, and local-first as keeping data on the user's own machine.
Ingela Andin on the TLS Stack Running Under Every BEAM App
Q: So Ingela, what separates a bug from a vulnerability, and where does your code sit when someone makes a secure connection from a BEAM application?
A vulnerability is a bug that can be exploited by an attacker to cause harm, such as denial of service or data manipulation; not every bug qualifies as a vulnerability, and proper TLS use and architecture determine where risk lies in the BEAM ecosystem.
Is Your Elixir Code Actually Fast? Tobias Pfeiffer on Benchmarking
Q: Why are inputs and realistic scenarios essential in benchmarking?
Inputs determine which implementation will appear fastest; different data shapes reveal different performance characteristics, so you need a map of inputs and ranking per input to understand true behavior across real workloads.
Is Your Elixir Code Actually Fast? Tobias Pfeiffer on Benchmarking
Q: What is a micro benchmark and how is it different from timing a script with shell time?
A micro benchmark measures a specific piece of code in isolation, but the BEAM and startup effects can distort results if not controlled; a proper benchmark isolates the function from startup, warms up the VM, and collects multiple samples to produce statistically meaningful results.

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Frequently Asked Questions About BEAM There, Done That

What is BEAM There, Done That about and what kind of topics does it cover?

This show concentrates on building real systems with BEAM languages, emphasizing practical, battle-tested lessons from production deployments. Across recent episodes, listeners get blunt discussions about benchmarking, performance measurement, and realistic workloads; deep dives into BEAM tooling, typing, and the developer experience at scale (including language platforms, formatters, and static analysis); and explorations of runtime design, JITs, hot upgrades, and embedding BEAM in constrained hardware. Guests range from CTOs and senior engineers to researchers and open-source maintainers, bringing concrete anecdotes about memory, latency, observability, and maintainability. A standout throughline is a commitment to concrete engineering de... more

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1. Elixir Mentor
2. Macro Mayhem
3. Oxide and Friends
4. Software Engineering Daily
5. Startups For the Rest of Us

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BEAM There, Done That launched 8 months ago and published 34 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on BEAM There, Done That?

Recent guests on BEAM There, Done That include:

1. Erik Stenman
2. Ingela Andin
3. Alex Koutmos
4. Kip Cole
5. Tobias Pfeiffer
6. Louis Pilfold
7. Roberto Aloi
8. Michał Muskała

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