Minimalist Social Media Banner Design

I'm in need of a skilled designer versed in modern, minimalist aesthetic principles to craft a compelling banner for Twitter. This banner will be integral to our social media promotion efforts. Additionally, an understanding of Twitter's specifications and best design practices for maximum engagement would be ideal. Key skills include:
- Proven experience in minimalist design
- Familiarity with social media promotion
- Knowledge of Twitter's design guidelines and best practices.