Senior Java Engineer

Leadingnation; Hong Kong; On-site; HKD 600,000 - 1,000,000; Full time

Job summary

Ceffu in Hong Kong seeks an experienced backend engineer to design and maintain scalable Java services. You will own backend architecture, build secure APIs, and drive reliability, performance, and high availability across distributed systems.

You'll collaborate with cross-functional teams, review code, and advance AI engineering capabilities within the platform. The role requires 5+ years Java, Spring Boot, REST, SQL databases, and modern dev tools. HK location, full-time on-site.

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or a related field.
• 5+ years 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.

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

Java

Spring Framework

Distributed systems

RESTful APIs

SQL databases

Docker/Kubernetes

Kafka/RabbitMQ/RocketMQ

Git & CI/CD

Performance tuning

Problem solving

Education

Bachelor's degree in CS/SE or related

Tools

Spring Boot

MyBatis/MyBatis-Plus

Redis

MySQL/PostgreSQL

Kafka/RabbitMQ/RocketMQ

Docker

Kubernetes

Job description

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

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.