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Embedded Software Engineer
Jairo R. Mejia Aponte

I build embedded Linux
from bootloader to userspace.

From BitBake recipes to userspace daemons — I build embedded Linux systems for connected industrial devices. I document what I learn — the kind of detail that doesn't fit in a README.

Read the blogDownload CV↓
~/yocto/build
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// about

I work on Yocto-based Linux systems for industrial networking devices — railway routers, vehicle gateways, and connectivity platforms running LTE, 5G, WiFi, and GPS. My day-to-day spans from writing BitBake recipes and configuring layers to building userspace services with C/C++ and systemd.

This site is where I document the things I learn — the kind of practical detail that's hard to find when you're debugging a recipe at 2 AM.

Yocto / OpenEmbeddedBitbakekasCMakeMakefileC / C++PythonBashLinux KernelsystemdLTE / 5GWiFiGPSD-BusudevSerial (UART, SPI, I2C)SWUpdateGitDockerCI/CD PipelinesJenkins
$ cat stats.txt
EXPERIENCE
4+ years
INDUSTRY
Railway & Vehicle Networking
COMMUNICATIONS
LTE · 5G · WiFi · GPS
STACK
Yocto · Linux Kernel · C/C++
DEPLOYED
Production embedded devices
// featured posts
2025-04-01Featured
Five things you need to know about working with Yocto
Building Linux systems is still tough, but Yocto and Buildroot simplify it a lot. The problems of building a Linux embedded device from scratch and why these tools change the game.
cross-compilationyoctolinux
2025-05-01
Why you should use devtool on Yocto
Stop reinventing the wheel — devtool makes cross-compilation development easy.
cross-compilationyoctolinux
2025-03-20
Why I use Yocto over Buildroot as building tool
As you may get for the title, I will just write why I think Yocto and OpenEmbedded is the right tool for building your custom Linux Embedded systems, even for personal projects.
cross-compilationyoctolinux
2025-03-27
Why you need to use pkgconfig for your own libraries
A better way to manage compiler and linker flags across projects.
cross-compilationyoctolinux
2025-03-20
My developer setup and some hidden terminal gems
Open-source tools I use daily while developing embedded systems on Linux.
open-sourcedev-setuplinux
View all posts →
// featured docs
~/yocto/Tutorial
How to debug applications in Yocto
Network errors, misordered inherits, and config overrides that silently fail — the debugging gotchas that cost hours, and how to work around them.
yoctoadvance-yoctolinux
~/yocto/
How to use devtool to create and test applications on Yocto
Create a recipe from scratch, build a library, and wire up a ptest package for unit tests — the devtool basics, end to end.
cross-compilationyoctolinux
~/yocto/
How to create plugins for devtool in Yocto
The undocumented part of devtool: how to register your own subcommands and automate repetitive steps in your daily workflow.
yoctoadvance-yoctolinux
~/linux/
Using pkgconfig for your custom-libraries
Stop hand-maintaining compiler and linker flags. Generate a .pc file for your shared library and let pkgconfig do the work.
cross-compilationyoctouser-space
~/yocto/
How to start with Yocto even without hardware
A realistic Yocto setup built on Bootlin layers and QEMU — a better starting point than Poky when you are heading toward a real product.
yoctofundamentals-devtoolqemu
~/yocto~/linux~/coding