In my role as a Frontend developer at DevStar Inc., I have used both ReactJS and VueJS extensively. The decision to use ReactJS or VueJS largely depends on project requirements. However, for more complex UIs, I lean towards ReactJS due to its ability to handle large datasets and complex UI interactions seamlessly.
One of my major projects involved building a real-time analytics dashboard for our client's e-commerce platform. ReactJS's virtual DOM allowed quick re-rendering of components whenever data updates occurred, leading to more responsive real-time visualizations.
On the other hand, when working on projects leaning more towards simpler UIs, like developing a static landing page for an upcoming product, I prefer VueJS because of its flexibility, succinct syntax, and rapid development time. I once helped reduce the loading time of such a website by 15%, thanks to VueJS's efficient page rendering.