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fernando@ffcastillo:~$whoami

Hi, I'm Fernando

I'm a backend software engineer at PersonalSoft. I write Go, build microservices and observability tooling, and write down what I learn.

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projects

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Things I built and wrote up.

~/projects/la_cuponera_sam

la_cuponera_sam

A serverless Go backend on AWS, deployed with SAM, that handles more than 2 million requests a month.

awsgoserverlessdynamodb
archivedsource
~/projects/trazor

trazor

A lightweight Go agent that uses eBPF uprobes to measure Nginx HTTP latency with microsecond precision, without a sidecar.

goebpflinuxobservability
archivedsource

writing

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Stories, thoughts and findings, newest first.

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about

[more about me →]

Backend software engineer based in San Salvador, El Salvador. I write Go and I like systems I can measure.

role
intermediate software engineer, PersonalSoft
focus
Go microservices, cloud, observability
stack
Go, AWS, Linux, eBPF
location
San Salvador, El Salvador
studying
software development and digital business engineering, ESEN
speaks
english, español