Cloud-Based Design & Calligraphy Software

I'm looking to develop a cloud-based software targeting professional designers and calligraphers. The software should offer an intuitive, user-friendly design interface with features such as drag-and-drop elements, pre-designed templates, and real-time collaboration.

Key software features:
- A subscription model to sustain ongoing development and support
- Multiple download formats including PNG, PDF, and SVG
- An innovative calligraphy engine that sets our software apart from competitors

Ideal candidates for this project should have extensive experience in software development, preferably with a focus on design and calligraphy tools. A deep understanding of creating user-friendly interfaces and subscription-based models is crucial. Familiarity with implementing collaborative features in software is a plus.