Artemis
Cold-email infrastructure I built solo, end to end. The first time I made money on the internet from code I wrote myself.
A guy named Lewis came to me with a cold-email problem and the conviction it could be solved better. I built the whole code base myself — 124 commits on the backend alone, eight months of evening and weekend work — while still doing a full-time engineering job.
Artemis was the inflection point. First time I’d shipped a real product end-to-end, by myself, that someone paid for. It still earns. After it shipped, Lewis told me I should be doing this for other people. That sentence is the reason Devcore exists.