03 Sep 2024
https://danielmangum.com/posts/founder-mode-non-founders/
Paul Graham’s Founder Mode essay, based on a recent talk from AirBnB founder Brian Chesky, has been getting quite a lot of attention over the past few days. It has prompted many a quote tweet, and founders, such as Bryan Cantrill of Oxide Computer, have started contributing their own thoughts to what founder mode means to them.
Having held positions of influence at a few companies, but never having been a founder myself, my initial read raised a few thoughts about my own experience of trying to ...
https://danielmangum.com/about/
My name is Daniel Mangum and I am the Chief Technology Officer at Golioth, where I lead engineering efforts that span hardware, firmware, and cloud software. Previously, I was a principal software engineer at Upbound where I helped build Upbound Cloud, Upbound Marketplace, and the open source Crossplane project. Prior to Upbound, I worked as a counsultant on large-scale cloud deployments at Fortune 500 companies.
I have participated in multiple open source communities, including holding leadersh...
07 Oct 2026
https://danielmangum.com/posts/whats-on-that-access-port/
In my last post, I wrote about debugging the Nordic Semiconductor nRF54LM20 when a peripheral, specifically the Key Management Unit (KMU), writes directly to memory while the CPU is halted. Or I should really say that I wrote about debugging the application core (Cortex-M33), as the nRF54LM20 also has a RISC-V coprocessor (VPR) referred to as the Fast Lightweight Peripheral Processor (FLPR). Around the time that Nordic announced the VPR core, I wrote two posts; one about its architecture and the...
18 Sep 2026
https://danielmangum.com/posts/when-the-debugger-lies/
I’ve spent the last few weeks working with the security architecture of the nRF54L series from Nordic Semiconductor (in case you missed it, I recently joined Nordic!). While doing so, I have engaged my typical low-level learning technique of eschewing writing firmware for manually poking at registers using the debugger. A few nights ago I found myself observing unexpected values in memory when working with the key management unit. It turned out to be a familiar issue, but one that requires an un...
24 Aug 2026
https://danielmangum.com/posts/farewell-golioth-hello-nordic/
Friday was my last day at Golioth (and Canonical), and today is my first day at Nordic Semiconductor! It has been an interesting journey to say the least, but before diving into what drew me to Nordic, I would be remiss not to briefly reflect on my time at Golioth.
I joined Golioth after a few years at Upbound, where I spent the majority of my time working on the open source Crossplane project, before eventually moving over to lead teams that built Upbound Cloud and the Upbound Marketplace.