Senior Java Engineer

About Ceffu Ceffu is a leading institutional-grade digital asset custody platform, offering secure, compliant, and scalable solutions for enterprises, hedge funds, and financial institutions.  Our mission is to provide cutting-edge security and infrastructure to support the seamless integration of blockchain technology into institutional finance. Job Responsibilities Design, develop, and maintain scalable, highly available, and high-performance backend services using java. Take ownership of backend architecture and continuously optimize system scalability, reliability, and performance. Participate in requirements analysis, technical design, implementation, testing, deployment, and production support throughout the software development lifecycle. Build secure, resilient, and maintainable distributed systems for high-concurrency business workloads. Develop and optimize APIs, database models, and system integrations to ensure stability and efficiency. Collaborate closely with cross-functional teams to deliver high-quality solutions. Conduct code reviews, contribute to technical standards, and drive engineering best practices across the team. Monitor production systems, troubleshoot incidents, and proactively identify performance bottlenecks and system risks. Lead or contribute to the development and continuous improvement of AI engineering capabilities, tools, and infrastructure. Stay current with emerging technologies and share technical knowledge with the team. Skills & Experience Required Bachelor's degree in Computer Science, Software Engineering, or a related field. 5+ years of backend development experience with strong proficiency in Java. Solid understanding of object-oriented programming, design patterns, clean code principles, and software engineering best practices. Hands-on experience with the Spring ecosystem, including Spring Boot and Spring MVC, and persistence frameworks such as MyBatis or MyBatis-Plus. Strong experience designing distributed systems with a focus on scalability, reliability, fault tolerance, and high availability. Experience with relational databases such as MySQL or PostgreSQL, and caching technologies such as Redis. Familiarity with message queues such as Kafka, RabbitMQ, or RocketMQ. Experience with microservices architecture, Docker, and Kubernetes. Good understanding of RESTful API design and backend security best practices. Familiarity with Git, CI/CD pipelines, and automated testing practices. Strong analytical, debugging, and problem-solving skills. Basic English reading and writing skills. Preferred Qualifications Experience in developing Web3, digital asset custody, cryptocurrency exchange, or blockchain infrastructure systems. Experience designing high-throughput, low-latency backend systems. Experience applying AI technologies to improve engineering productivity or building AI-powered applications or components. Full-stack development experience