Comment by esseph

> Trust me, you get plenty of experience in this as a founding engineer in a startup.

Now be part of the team of folks that keeps that application running for 10, 20, 30 years. Now be part of the transition team to the new app with the old data. Those tasks will also teach you a lot about system stability, longevity, and portability... lessons that can only be learned with more time than a startup has.