Nippon Data System- Blockchain + Java Developer

Experience: 4–7 Years
Employment Type: Full-Time

We are looking for a highly motivated Blockchain + Java Backend Developer to join our Digital Assets Platform engineering team. The ideal candidate should have strong expertise in Java backend development along with hands-on experience in blockchain technologies and Web3 infrastructure.

You will be responsible for designing, developing, and maintaining scalable enterprise-grade backend applications that leverage blockchain technology. This role requires a solid understanding of distributed systems, microservices architecture, blockchain fundamentals, and cloud-native application development.

If you're passionate about building secure, high-performance backend systems and want to work on next-generation digital asset platforms, we'd love to hear from you.

• Design, develop, and maintain scalable backend services using Java and Spring Boot.
• Build enterprise-grade applications leveraging blockchain and distributed ledger technologies.
• Collaborate with architects, product managers, and cross-functional engineering teams to deliver high-quality software solutions.
• Develop RESTful APIs and microservices following industry best practices.
• Design and implement event-driven architectures using Kafka or JMS.
• Integrate blockchain networks and Web3 infrastructure into enterprise applications.
• Ensure application reliability, scalability, security, and performance.
• Develop and optimize SQL and NoSQL database solutions.
• Deploy and manage containerized applications using Kubernetes.
• Participate in code reviews, testing, debugging, and technical documentation.
• Work in Agile development environments using tools such as Jira and Git.

• Bachelor's degree in Computer Science, Engineering, or a related field.
• Master's degree is a plus.

• 4–7 years of software development experience.
• 3–5 years of hands-on experience in Java backend development.
• Up to 2 years of experience working on Blockchain/Web3 applications.
• Experience in Financial Services or FinTech is an added advantage.

• Core Java (Java 8/11/17)
• Spring Boot
• Spring Framework
• REST APIs
• Microservices Architecture
• JPA / Hibernate

• Apache Kafka
• JMS

• SQL (MySQL/PostgreSQL)
• NoSQL (MongoDB)

• AWS or Azure
• Kubernetes
• Docker (Preferred)
• CI/CD fundamentals

• Git
• GitHub / Bitbucket
• Jira
• IntelliJ IDEA / Eclipse

• Strong understanding of Blockchain architecture and Distributed Ledger Technology (DLT).
• Experience with Web3 infrastructure and Digital Asset platforms.
• Knowledge of Ethereum, Hyperledger Fabric, Polygon, or similar blockchain platforms.
• Understanding of consensus mechanisms (PoW, PoS).
• Knowledge of cryptographic principles.
• Understanding of peer-to-peer (P2P) networks.
• Familiarity with Smart Contracts is preferred.
• Exposure to Zero-Knowledge Proofs (ZKP) is an advantage.