Responsive MJML Email Template

I need a responsive email template built in MJML for transactional information. The template should look great across different email clients and devices.

Key requirements:
- Must include:
- Logo and Header
- Call-to-Action Button
- Footer with Contact Information

Ideal Skills:
- Proficiency in MJML
- Experience with responsive email design
- Familiarity with various email clients and their rendering quirks
- Attention to detail in branding and layout

Please share samples of previous work.