"We brought in Jastej when we had a working MVP but no design coherence. Within weeks, he transformed the entire UI into a sleek, dark/light theme-supported interface that actually made the product usable. He created a robust atomic design system, tackled inconsistent user flows, and collaborated directly with both me and our developer to make sure everything shipped smoothly. His attention to UX details helped reduce support tickets by over 40% in the first two weeks post-launch."