A bespoke software company chooses the tech stack according to the idea that revolves around a specific product. If you need a fast, scalable bespoke business system, we would probably recommend Node.JS to you. Although if you would prefer to focus on the magnificent frontend that would bring you to your knees, other languages will be widely discussed. Same case pertains to bespoke mobile app development. So: it depends. The technique will be adjusted to the product’s requirements.