larsen cundric

@larsencc

founding engineer at browser use. prev. flexport.

I build the infrastructure behind millions of AI agent runs. Small tools on the weekends. Mostly CLIs, occasionally SaaS, always in public.

work

browser use 1.5k+ prs

the way AI uses the web. i own the cloud infra behind it.

write-it-down.com 2.6k users

simple personal finance tracker

port-whisperer ★ 864

a beautiful cli to see what's running on your ports

writing

how we built secure, scalable agent infra on aws

millions of untrusted agents, each in a private micro-vm with zero credentials

everything i got wrong in the last 4,000 commits

every mistake from a year as the first engineer at browser use, in chronological order

nothing matters

i spent weeks preparing for my leave, but nothing prepared me for this

how we built secure, scalable agent sandbox infra

from aws lambda to unikraft micro-vms with a control plane architecture

currently

locationsan francisco, us

shippingthe agentcore runtime behind every browser use agent run

in sf? coffee.

always down to meet people building interesting things. agents, open source, startups, anything.

larsen@cundric.com →

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