Full-Stack Web Developer Needed

I need a professional full-stack web developer to design our company website and enhance our existing product prototype. The main focus of the website will be providing company information and showcasing our product.

Key tasks include:
- Designing a company website to align with our brand guidelines
- Enhancing a working product prototype with:
- Improved user interface design
- Additional functionality
- Performance optimization

Ideal skills and experience:
- Expertise in both front-end and back-end development
- Strong UI/UX design skills
- Experience in optimizing application performance
- Familiarity with brand guideline implementation

Please provide a portfolio showcasing similar projects.