A blockchain quality assurance engineer is a professional who specializes in ensuring the quality and reliability of blockchain technology. They are responsible for testing and validating blockchain systems, identifying and fixing any issues or bugs, and ensuring the overall performance and security of the blockchain network.

As for the 15 features/advantages of a blockchain quality assurance engineer, here are some:

1. Expertise in blockchain technology: They possess in-depth knowledge and understanding of blockchain concepts, protocols, and frameworks.

2. Testing and validation: They have the skills to thoroughly test and validate blockchain systems to ensure they function as intended.

3. Security assessment: They can identify potential vulnerabilities and security risks in blockchain networks and implement necessary measures to mitigate them.

4. Performance optimization: They can optimize the performance of blockchain systems by identifying and resolving bottlenecks or inefficiencies.

5. Compliance and regulatory adherence: They ensure that blockchain systems comply with relevant regulations and industry standards.

6. Continuous improvement: They constantly strive to enhance the quality and efficiency of blockchain systems through continuous testing and improvement.

7. Collaboration: They work closely with developers, designers, and other stakeholders to ensure seamless integration and functionality of blockchain systems.

8. Documentation: They maintain detailed documentation of test cases, procedures, and results for future reference and knowledge sharing.

9. Problem-solving skills: They possess strong analytical and problem-solving skills to identify and resolve complex issues in blockchain systems.

10. Communication skills: They effectively communicate with team members and stakeholders to convey testing results, recommendations, and progress updates.

11. Risk assessment: They assess potential risks associated with blockchain systems and develop strategies to mitigate them.

12. Scalability testing: They conduct scalability testing to ensure that blockchain networks can handle increased transaction volumes without compromising performance.

13. Data integrity: They ensure the integrity and accuracy of data stored on the blockchain by implementing appropriate validation mechanisms.

14. Test automation: They utilize automation tools and frameworks to streamline testing processes and improve efficiency.

15. Continuous learning: They stay updated with the latest advancements and trends in blockchain technology to enhance their skills and knowledge.