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hero.tsx[0]

bruno guimaraes

Fullstack developer. I build web systems that stay calm under load.
$ whoami && cat now.txt
read the blogtake a skillemail melinkedingithub
whoami[1]
$ name
Bruno Guimaraes
$ role
Fullstack developer
$ focus
Web systems, DX, on-call sanity
$ stack
TypeScriptNext.jsNodePostgresGo
now.log[2]
→ shipping this site & blog.
! dependency audit queued.
→ watching old Strange Loop talks.
! a flaky test that only fails at 3am.
! prod alert at lunch. misconfigured cron.
blog/[3]
[2026-10-14] #postgres #performance
How an index made one query 8x slower, step by step
A measured case where a cheaper-looking index sent Postgres into a nested loop. What went wrong in the plan, and which numbers in EXPLAIN show it.
[2026-05-04] #ai #google #gemma #open-weights #infrastructure
Google gave away Gemma 4 and you should know why
Gemma 4 is not free because Google forgot how to charge. It is free because Google can make money from the cloud, devices, and developer ecosystem around the model.
[2026-04-30] #agents #ai-engineering #product-engineering
The stack your agent picks is a product decision
Coding agents are becoming default stack selectors. The risk is not always a bad pick. It is a reasonable local optimum that quietly becomes production.
see all →
contact.sh[4]
$email  mguimaraesbruno@gmail.com
$linkedin  bruno-guimaraes1
$github  brunomguimaraes
best response time: 24h on weekdays.
skills/[5]

Small instructions. One useful job each.

browse the toolbox →

An alert worth waking up for

Turn one noisy alert into a usable first-response note.

read / install →

Before another dependency

Make the maintenance cost visible before picking a tool.

read / install →

Retry safety review

Find what happens when the same operation runs twice.

read / install →