< data-start="635" data-end="660">Key ResponsibilitiesDesign, develop, and maintain scalable applications using Java, Spring Boot, and Microservices architecture.Build and optimize RESTful APIs and backend services for enterprise-grade applications.Develop and integrate blockchain-based solutions, smart contracts, and decentralized applications (dApps).Work with blockchain platforms such as Ethereum, Hyperledger Fabric, Polygon, Solana, or similar technologies.Collaborate with product managers,