whoami
i build useful systems
and write about how they work
i'm zam, a language-agnostic software engineer interested in backend systems, infrastructure, and the occasional hardware project.
recent notes
all notes ulimit in docker: when a janus sfu runs out of file descriptors a crash-looping SFU, a retry storm, and the 1024 open-file default nobody set reviving an i2c touchpad after suspend without rebooting tracing a dead touchpad to the i2c resume path and automatically rebinding its driver after sleep postgresql shared memory in docker swarm: when free disk is not enough tracing a misleading no-space error to dev shm and mounting a larger tmpfs in a swarm service
experience
since 2020currently building security and monitoring systems at MicroSec. previously, i worked on education, aquaculture, and career products at eFishery, Ruangguru, and KitaLulus.