A Blockchain developer creates, implements, and supports blockchain protocols. They design secure blockchain technologies, develop application features and interfaces, and maintain the entire blockchain system. They also design smart contracts and web apps using blockchain technology. Their role includes optimization and protection of blockchain applications by integrating the latest tools and technologies. They work closely with project managers and other specialists to ensure the consistency of the system and its alignment with business objectives. They also research and analyze blockchain technology trends to improve existing applications or create better solutions. They are also responsible for troubleshooting and resolving blockchain-related issues.