I'm an Undergraduate Computer Science Student currently on a placement year at a company that produces and supports a large enterprise web application. I'm loving the experience of seeing how software is produced in the real world, and feel very lucky to find a company that offers a chance to not only maintain and extend existing functionality but also develop entirely new features for the product.
All that said, though, I'm very conscious that this is very, very unlikely to be a perfect example of how to develop correctly. Far from it, in fact. I feel I'm learning a massive amount from my experience here, and I don't want to learn the wrong things or pick up bad habits from colleagues that could be hard to shake off further down the road. Mostly it's easy to tell what's good and what's not - for example the Unit Test coverage here is practically non-existent for various reasons (mostly poor excuses mixed in with one or two valid points). Lately, though, I've been noticing a regular occurrence that I'm just not sure about.
Whenever we start a new project, naturally we need to find any relevant code that needs to be extended, altered, or removed. It seems to me that, the vast majority of the time, anything not within the most commonly used sections of the application takes people an age to find within the codebase. There are one or two tech leads who know their section of the code well, but even they get stumped sometimes and have to spend a long time searching for what they require, or turn to someone who has been editing that part of the code recently (if anyone) for help. When I say a long time, I don't mean hours (usually) but it seems to me that a good codebase would be navigable to any point within a few minutes at worst, to anyone even vaguely familiar with the system.
So, my question. Is the above problem due to poorly structured code? Alternatively, is it down to developers not having enough knowledge of the codebase? Or is it simply unavoiable in large applications, regardless of how much work goes into keeping the file structure clear?
Or, indeed...am I just wasting my time on a topic that really doesn't matter?