altcoin Wallet Developer

I'm in need of a skilled blockchain developer with a strong focus on Bitcoin-based technologies for the creation of a altcoin Wallet.

In your application, please detail your specific experience with Bitcoin development and your deep understanding of blockchain technology in general.

Key requirements include:
- Proficiency with blockchain technologies, particularly in the context of Bitcoin
- Experience in developing secure and user-friendly wallets
- Solid understanding of blockchain security best practices
- Ability to develop within the Bitcoin ecosystem, including knowledge of relevant APIs

Ideal candidates will be able to provide evidence of past work in this area, such as examples of Bitcoin wallets and related projects. Please share any relevant portfolio items or case studies.