A blockchain privacy engineer is a professional who specializes in ensuring the privacy and security of blockchain networks. They work on implementing various techniques and protocols to protect sensitive information and maintain confidentiality within blockchain systems.

As for the 15 features/advantages of a blockchain privacy engineer, here are some key points:

1. Expertise in cryptography: A blockchain privacy engineer possesses a deep understanding of cryptographic techniques used to secure data within a blockchain network.

2. Privacy-focused mindset: They prioritize privacy as a fundamental aspect of blockchain design and implementation.

3. Knowledge of privacy-enhancing technologies: They are familiar with various privacy-enhancing technologies like zero-knowledge proofs, ring signatures, and secure multi-party computation.

4. Understanding of privacy regulations: They stay updated with privacy regulations and ensure compliance within blockchain systems.

5. Data anonymization: They implement techniques to anonymize user data, ensuring that personally identifiable information is not exposed.

6. Confidential transactions: They work on implementing mechanisms to keep transaction details private, ensuring only authorized parties have access.

7. Privacy-preserving smart contracts: They develop smart contracts that maintain privacy by design, ensuring sensitive information is not exposed.

8. Auditability and transparency: They strike a balance between privacy and transparency, enabling auditors to verify transactions without compromising privacy.

9. Secure identity management: They implement robust identity management systems within blockchain networks to protect user identities.

10. Permissioned access: They design systems that allow only authorized parties to access specific data, ensuring privacy is maintained.

11. Secure data sharing: They enable secure sharing of data within blockchain networks, ensuring privacy is preserved.

12. Privacy impact assessments: They conduct privacy impact assessments to identify potential privacy risks and implement necessary safeguards.

13. Continuous monitoring: They establish monitoring systems to detect and mitigate privacy breaches in real-time.

14. Collaboration with privacy experts: They work closely with privacy experts to ensure best practices are followed in blockchain design and implementation.

15. Ongoing research and development: They stay updated with the latest advancements in privacy technologies and contribute to the development of new privacy-enhancing solutions.