Everything I Got Wrong in the Last 4,000 Commits

A founding engineer chronicles a year of costly mistakes made while building a cloud infrastructure from scratch, detailing over 4,000 commits. The catalog of errors includes accidentally giving users free money due to billing bugs, fixing the exact same code pattern three times in one day, and building entire features that nobody ever used. More complex problems emerged under scale, such as a "memory leak marathon" from improper connection handling and a single configuration change that took down three separate services. These experiences serve as a cautionary tale, highlighting how moving too fast without proper testing or foundational design leads to a series of preventable and recurring bugs.