Design and Develop a High-Converting Landing Page with Upsell

I am looking for a skilled freelancer to design and potentially develop a high-converting landing page for my product. The goal is to effectively showcase the product and encourage visitors to take a specific action (e.g., Purchase, sign up). A key requirement is the integration of an upsell strategy within the page design to maximize conversion value.

The project involves:
- Designing a visually appealing and user-friendly landing page layout.
- Creating compelling graphics and incorporating existing brand assets.
- Designing the user flow to include strategic upsell opportunities.
- Ensuring the design is optimized for conversion.
- (Optional, depending on freelancer skills) Front-end development (html, css, javascript) to bring the design to life.

Please provide examples of previous landing pages or conversion-focused designs in your portfolio. Detail your process for designing for conversion and how you approach integrating upsell elements effectively.