Different applications will fail in different ways. It is very hard to prepare or learn about these kinds of failure modes without being actually exposed to one

Different applications will fail in different ways. It is very hard to prepare or learn about these kinds of failure modes without being actually exposed to one. What you can do, though, is make sure you employ good principles in all the work you do. Try to make things simple as opposed to complex. Make code as readable as you can. Add logging. Have some form of testing to make sure things are working all the time. This will get you 95% there. The remaining 5% you will learn once you get there. Lastly, less than 1% of coders work or will ever work in such applications so don’t worry too much about it.