Underjord.io

I’ve been active in the Nerves community ever since 2019 when I made it control a small eInk display.

Oredev is an awesome conference I really enjoy.

I mostly program in Elixir.

I’m going to be speaking at ElixirConf EU in Malaga.

In September of 2025 Tigris sponsored an odd effort at an unusual conference.

Goatmire Elixir 2025 was a very dense success.

The quiet was unsettling.

In the previous post on 500 virtual linux devices on ARM64 I hinted that I expected serious improvements if we got KVM working.

This is the first part of an experimental journey as I explore how many instances of my favorite IoT framework I can run on the 192 core Ampere One.

Binary deltas of firmware via fwup has been a supported feature for a while.

It all started when I visited Gig City Elixir.

We all have varying degrees of exposure to Big Tech.

I wanted there to be an Elixir shirt you could buy.

Me and the team had a meeting which we dedicated to talking about architecture.

I hacked on something quite useful in the last few weeks, off and on.

What feels like forever ago but what was probably a year and a half I gave a talk about Lively LiveView with Membrane.

One of the Erlang ecosystem’s spiciest nerd snipes are hot code updates.

Working on the Nerves project, the Embedded framework for Elixir, has given me an increased appreciation for how Frank Hunleth and his collaborators through the years have structured things.

The Nerves project is a way of building embedded Linux devices where the BEAM virtual machine takes care of running things.

I adore Nerves.

I’ve kept very busy recently and as I look at what I published last it has clearly kept me from blogging.

My newsletter-provider Campaign Monitor (not a recommendation, they are .. fine I guess) are having an outage.

Fly.io is a highly visible cloud provider in the Elixir ecosystem and they put forward an interesting promise.

I went to Chattanooga in Tennessee from Sweden to hang out with the Elixir community.

In this part of the series we dive into one of the frameworks and toolsets that really got me going with both Elixir as a hobby and the community as a space full of helpful people.

I did a livestream where I talked about Object Storage.

TLDR: the tricky part is “Large”.

In this series I’ve been unpacking various facets of Elixir.

This series covers a lot of fundamentals about the underlying BEAM VM and Erlang as consequence of covering Elixir fundamentals.

Elixir supports the usual supects of observability.

The nine nines. 99.9999999% of uptime.

Elixir was built on Erlang.

Elixir is a language with syntactical roots in Ruby.

Elixir is the thing I do most of my public writing and speaking about.

We of the blessed church of Functional Programming pride ourselves on our immutability, purity and lack of noxious side-effects.

I was a Python developer for some time and one great joy of Python is that you have an expressive language that you can use for your serious apps as well as for your hacky little one-off script or bespoke pieces of automation.

Another question might be; why do machine learning at all?

Last week I attended ElixirConf in Portugal and had a lovely time.

I like production gear.

A short video on databases.

Code has always been about creative pursuit for me.

I share my reactions to the Phoenix keynote at ElixirConf 2022.

Are computers really all about queues?

A short video on the importance of terminology in computing.

My presentation from ElixirConf Africa.

As part of running Underjord I’ve done both mentorship and some teaching.

Twice burnt, getting the hang of this fire thing.

I’ve been trying to address this particular topic and I find it challenging.

Slack, Teams, teamchat.

I’ve been thinking about shared experiences: culture and tradition.