When do I need a full team instead of one developer? — answered by Engineer Saeed Baatiah
When two of these three are true: the project exceeds six months of continuous work, it needs distant specialisms simultaneously such as a mobile app plus a web interface plus a heavy backend, or it must stay up around the clock with an on-call rotation. Below that, one experienced developer is faster and cheaper, because half of a small team’s time goes into coordination rather than building.