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BEAM There, Done That

Plangora
Elixir
Beam
Erlang
Whatsapp
Local First
TV Labs
Rust
Hologram
Bandit
Gleam
JIT
Ash Framework
Phoenix
Native Records
Ericsson
Zig
Concurrency
Prolog
Sonic Pi
Durableserver

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

PublishesWeeklyEpisodes31Founded7 months ago
Number of ListenersCategory
Technology

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Artwork for BEAM There, Done That

Latest Episodes

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

The Navajo Nation inside Arizona observes daylight saving. The Hopi reservation inside the Navajo Nation skips it again. There's a corner of the Yucatan Peninsula that takes 20 minutes to drive through and costs you an hour on your sat nav. No compil... more

Everyone has an opinion about whether the BEAM is fast or slow. Almost nobody has actually measured it properly.

Tobias Pfeiffer -PragTob on the internet, benchmarking nerd, real-time engineer at Supabase -came to Elixir from Ruby because Ruby could... more

What if the BEAM had a language that felt like talking to a friend instead of fighting a compiler?

That's the problem Louis Pilfold set out to solve. He loved the BEAM. He missed static types. Every other option was a tradeoff he couldn't live with.... more

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Recent Guests

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
Developer Experience at WhatsApp and Meta
WhatsApp/Meta
Episode: Inside WhatsApp with Roberto Aloi & Michał Muskała
Michał Muskała
Developer Experience at WhatsApp and Erlang expert
WhatsApp/Meta
Episode: Inside WhatsApp with 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
Paul Guyot
Author of Erlang Behind La Machine and contributor to La Machine
La Machine project
Episode: Erlang on a Microcontroller: Davide Bettio & Paul Guyot on AtomVM
Matt Trudel
Author of Bandit and Thousand Island; engineer in the AI and animation group at PagerDuty
PagerDuty
Episode: Mat Trudel on Building Bandit - the Web Server Running Your Phoenix App
Maxim Kharchenko
Erlang runtime developer; creator of Erlang on Xen and Ling VM
Independent researcher/engineer (Ling/LingX/OpenFlow work)
Episode: Erlang Without an OS: Maxim Kharchenko on Building LING

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

How this podcast ranks in the Apple Podcasts, Spotify and YouTube charts.

Apple Podcasts
#76
Norway/Technology
Apple Podcasts
#223
Finland/Technology
Apple Podcasts
#244
Poland/Technology

Talking Points

Recent interactions between the hosts and their guests.

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.
Inside WhatsApp with Roberto Aloi & Michał Muskała
Q: Tell our listeners who you are and what you do at WhatsApp.
Roberto explains his focus on developer experience and Erlang tooling at WhatsApp and Meta, working to improve productivity and the BEAM ecosystem.
Mat Trudel on Building Bandit - the Web Server Running Your Phoenix App
Q: What is Bandit and where does it fit in the ecosystem with Phoenix and Plug?
Bandit serves Plug requests for HTTP and provides a bridge between the wire protocol and Plug representations, with Thousand Island handling the lower-level socket and concurrency, letting Bandit focus on the HTTP layer.
Erlang Without an OS: Maxim Kharchenko on Building LING
Q: What design choices are you most proud of in Ling?
The dynamic instruction code system that tailors the VM's instruction set to the workload, and the memory management approach that guarantees all out-of-memory conditions are handled explicitly, avoiding silent failures.

Audience Metrics

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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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BEAM There, Done That launched 7 months ago and published 31 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. Kip Cole
2. Tobias Pfeiffer
3. Louis Pilfold
4. Roberto Aloi
5. Michał Muskała
6. Davide Bettio
7. Paul Guyot
8. Matt Trudel

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