From my experience with custom software, the biggest hidden challenge in requirements gathering is unstated assumptions—users often skip details they consider ‘obvious.’ This makes involving end users before coding absolutely critical to prevent massive rework later. Regarding scaling and integration, the most common pitfall is underestimating legacy data inconsistency, which can complicate post-release support. To mitigate these risks upfront, you need a team that prioritizes thorough discovery. I highly recommend checking out https://topdevs.org/ they excel at digging deep during the planning phase to build scalable, custom solutions that actually fit your business processes from day one.
