I guess technically I was a hardware architect for 10 of them in the middle there. Although I was still writing a bunch of code, for money, so...

My first professional project was a patient database for my father, written in BASIC on an Amstrad 1512 with dual floppy disks and no hard drive.

I didn't really know what I was doing, but it was the first electronic database & analysis program in the hospital - his previous "database" was a big paper ledger book. My sister also earned some money by typing the data from that ledger into the database.

The hospital later made a proper database for a squillion dollars, but we defined the spec!