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Elixir Radar Newsletter Issue #523

This issue is brought to you by Potions.io ...

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Try it out with a 14-day free trial at Potions.io.

Articles

Vivian Mathews shares how River rebuilt its core ledger around a two-function Elixir API and moved it into production with zero downtime. He covers immutable events, accounting constraints, shadow writes, parity checks, and a reverse migration.

Mateusz Front introduces the first release of Local LiveView, which runs LiveView code in the browser through Popcorn! He shows how to move an existing live component to the client while keeping the familiar LiveView API, and how local LiveViews can sync with the server. Amazing!

What happens when a process you depend on dies? Krishnadas explains process monitoring from the BEAM primitives up. He builds examples with Process.monitor/1 and :DOWN messages to detect normal exits and crashes without using GenServer or Supervisor.

Honeybadger - Sponsor

Logs tell you something happened, but not why it happened. Honeybadger filters out the noise and turns your Elixir logs into context-rich issues, so you can stop guessing and ship the fix.

Bandit reached the same monthly download volume as Cowboy in July 2026. Rodolfo Carvalho examines the Hex.pm data behind its rise and considers Phoenix installer defaults, security patch adoption, and the tradeoffs for new and existing projects.

WebSockets or SSE with Fetch? José Valim shifts the discussion from latency and payload size to event ordering. He shows how multiple data streams can race, leave the UI stale, and add complexity or latency when you try to fix it.

Videos

Marc Lainez shows how they turned a 2007 VW Polo into a remote-controlled EV, using Nerves and Elixir running on Raspberry Pis. He walks through the hardware, CAN networks, and GenServers that make the car drive.

Job listings

Peek - Remote, Mexico
Peek is the operating system powering the experiences industry - from museums and attractions to tours and activities. The ideal candidate has 5+ years of development experience in Elixir, experience with GraphQL APIs and MySQL, and familiarity with messaging queues such as RabbitMQ.

Events

September 10-11 / Chicago, USA & Virtual
September 30 - October 02 / Vanberg, Sweden
October 21-22 / Haarlem, Netherlands & Virtual
November 12-13 / Austin, USA

Learn how to leverage OTP and the power of the BEAM.

Download the free chapters from "Elixir Patterns", the book I wrote with Alex Koutmos.

As always, thanks for reading Elixir Radar!

-- Hugo
Hugo face
Sent by Hugo Baraúna @ Elixir Radar
Av Paulista, 1636, São Paulo - SP, Brazil
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