Sleek dApp Design

I'm looking for a talented designer to create a professional and sleek design for my decentralized application (dApp). The dApp will require the following functionalities:

Smart contract integration
User authentication and profiles
Token transactions

Ideal skills and experience:
- Strong background in Web3 and dApp development
- Expertise in smart contract integration
- Experience with user authentication systems
- Knowledge of token transaction processes
- Proven design skills with a focus on professional and sleek aesthetics

Please provide a portfolio showcasing similar work.