DApp Developer Needed

I'm seeking a dedicated blockchain developer to build a Decentralized Application (DApp) with the following functionalities:

- User Authentication
- Payment Processing
- Data Storage

Ideal candidates should have:

- Proven experience in DApp development, particularly on Ethereum, Binance Smart Chain, or Polkadot
- Strong knowledge of smart contracts and blockchain technology
- Proficiency in integrating secure user authentication and payment processing systems
- Expertise in designing and implementing efficient data storage solutions on blockchain

Please provide examples of previous DApp projects you have worked on.