senior java backend engineer java 21 spring boot

OKX in Hong Kong seeks an experienced backend engineer to design, build, and optimize the Wallet Earn on-chain investment platform. You will scale high-concurrency systems, ensure fund safety, and integrate with DeFi protocols across multiple chains.You will contribute to the AI Agent Marketplace core platform, own architecture of Agent, Task, and Order, and...

Binance is a leading global blockchain ecosystem behind the world’s largest cryptocurrency exchange by trading volume and registered users. We are trusted by 300+ million people in 100+ countries for our industry-leading security, user fund transparency, trading engine speed, deep liquidity, and an unmatched portfolio of digital-asset products. Binance...

Binance in Hong Kong seeks a senior backend engineer to develop and implement backend services for AI chatbot products. You will build large-scale systems impacting millions of users and integrate LLM applications to boost performance and UX.The role requires strong Java and Python, system design, and cross-team collaboration. Binance offers a remote-first...

Infosight Consulting Limited is seeking a senior IT Lead to own production support, incident management, and root cause analysis for enterprise applications. The role requires strong hands-on experience with Java (Spring Boot, Microservices), Angular, React Native, and AWS, along with CI/CD automation and performance tuning.You will manage applications on...

Who We AreGalaxy Digital Inc. (Nasdaq: GLXY) is a global leader in digital assets and data center infrastructure, growing the economy that runs on code. Galaxy delivers the onchain infrastructure that connects institutions to digital assets, including trading, advisory, asset management, staking, self-custody, and tokenization. Galaxy also develops and...

IO TECH SOLUTIONS LIMITED is seeking a Backend Engineer to design, build, and maintain secure, scalable backend services that power our digital products. You will apply lean and agile principles to delivery and continuously improve platforms, collaborating with cross-functional teams worldwide. You will expert in Java 17+, Spring Boot/Spring Cloud, and cloud...

Galaxy Entertainment Group seeks an Analyst - Application Development to design, develop and maintain secure backend apps and microservices using Java, Spring Boot, and Hibernate. You will build cloud integration workflows, APIs, and data pipelines while collaborating with distributed teams and external vendors to meet business goals. The role requires...

A technology consulting firm in Hong Kong is seeking an experienced Analyst Programmer to manage the Software Development Life Cycle. Responsibilities include application development and user requirement analysis. The ideal candidate possesses solid experience in AWS and Java/Kotlin with Spring Boot, and should be able to work independently under pressure....

OKX Wallet is OKX's self-custody wallet, built to securely store and manage on-chain assets for users worldwide. We seek a Staff/Senior Java Engineer to own core backend modules and drive high-concurrency wallet features. You'll work across multi-chain environments (EVM, Tron, Solana) and apply sound engineering judgment, system design, and security...

Global Executive Consultants Ltd. is seeking a talented individual for a Java development role in Hong Kong. The candidate will design and implement backend solutions for Securities Trading applications, requiring strong skills in Java and Linux. Candidates must hold a degree in Computer Science and have at least 5 years of relevant experience. Proficiency...

IO Tech Solutions Limited is seeking a Backend Engineer to design, build, and maintain secure, scalable backend services. You will work with cross-functional teams to deliver digital products using lean and agile methods, and contribute to robust architectures powering new experiences. The role emphasizes microservices, REST, Java 17+, Spring Boot and Cloud,...

Binance is a leading global blockchain ecosystem behind the world’s largest cryptocurrency exchange by trading volume and registered users. We are trusted by 300+ million people in 100+ countries for our industry-leading security, user fund transparency, trading engine speed, deep liquidity, and an unmatched portfolio of digital-asset products. Binance...

Michael Page International (Hong Kong) Limited in Kowloon is seeking a senior software developer to design, develop, and maintain enterprise applications using Java and modern web technologies.You will build scalable backend services with Spring Boot and microservices, develop React.js user interfaces, collaborate with stakeholders, and contribute across the...

We are seeking a seasoned Backend Engineer with deep expertise in decentralized finance (DeFi) to lead the architectural design and development of our client's high-performance DEX platform. You will be responsible for building the core components of a world-class trading environment, focusing on ultra-low latency, high concurrency, and uncompromising...

SW8931 | 25 Feb 2026 Analyst Programmer / Software Developer (Java Spring Boot, 25-35K) Responsibilities Design, develop, and maintain backend services using Java Spring Boot. Collaborate with front‑end developers to integrate user‑facing elements with server‑side logic. Create testable code with appropriate unit/integration tests. Monitor,...

About the Role: Join our dynamic start-up company in the advertising technology industry as a Senior Backend Java Developer. Our client specialized in providing third-party advertising solution services on a global platform. This is an excellent opportunity to gain global exposure and be involved in building the entire backend system from...

2 weeks ago Be among the first 25 applicants Get AI-powered advice on this job and more exclusive features. Design and implement robust, scalable, and high-performance backend systems using Java. Collaborate with cross-functional teams to deliver high-quality software solutions. Application Optimization: Optimize system performance, including thread...

Ceffu is seeking an experienced Backend Java Engineer to design, develop, and maintain scalable backend services. You will take ownership of architecture, optimize performance, and collaborate across teams to deliver high-quality, secure systems for financial-grade digital asset custody.The role emphasizes distributed systems, RESTful APIs, and modern CI/CD...

OKX in Hong Kong seeks an experienced backend engineer to design, build, and optimize the Wallet Earn on-chain investment platform. You will scale high-concurrency systems, ensure fund safety, and integrate with DeFi protocols across multiple chains. You will contribute to the AI Agent Marketplace core platform, own architecture of Agent, Task, and Order,...

A large technology organization in Hong Kong is seeking a talented senior developer to join their innovative aviation sector projects. You will work hands-on with Java Spring Boot, NodeJS, and React Native, while leading junior developers in an Agile environment. The ideal candidate has at least 3 years of experience and is skilled in technical solution...