Classic & Professional Web App Redesign

I'm seeking a proficient UX/UI designer to upgrade my existing web app layout. At the moment, the design is visibly outdated, which negatively impacts user engagement. The new design should be classic and professional in style.

Key points to consider:
- **Outdated Visuals**: The current design needs a fresh, classic and professional touch to enhance user engagement.
- **Responsive Design**: It's crucial that the new design is optimized for various devices including mobiles, tablets, and desktops.

Ideal candidates for this project should have:
- Proven experience in UI/UX design, particularly in revamping outdated designs.
- A strong portfolio demonstrating their ability to create classic and professional designs.
- Proficiency in designing responsive layouts for a range of devices.