Responsibilities:

• Participate in the development of backend systems for the company’s centralized exchange (CEX), providing technical support for core business operations.
• Design architectures for complex future payment-related systems; demonstrate strong capabilities in designing large-scale distributed systems while ensuring high-quality architecture that balances development, operational, maintenance, and reliability costs.
• Contribute to solution design and technical reviews for key engineering projects; conduct quality assessments, identify issues during system iteration, and help enhance team efficiency and development quality.
• Lead research and resolution of critical technical challenges, ensuring stability of the core systems.
• Participate in core architecture implementation, write high-quality code, train and guide developers, and help standardize engineering processes.
• Lead the design, development, and innovation of real-time computing systems.
• Drive the architectural evolution of the trading matching engine (handling tens of millions to hundreds of millions of daily requests).
• Lead the development of rule engines, variable platforms, and other mid-platform (middleware) systems.

Requirements:

• Bachelor’s degree in Computer Science or related field; expert-level proficiency in Java and its ecosystem, with 8+ years of hands-on development experience.
• Experience in developing and optimizing large-scale data aggregation, query, and computation systems.
• Experience with large-scale system refactoring; hands-on exposure to DDD, middleware platforms, and CI/CD is a strong plus.
• Deep understanding of Java-related frameworks such as Spring Cloud Alibaba, MyBatis—their design principles and internal mechanisms; strong knowledge of transactions and distributed transactions.
• Proficient in Redis and at least one MQ technology such as RabbitMQ or RocketMQ; familiarity with middleware such as SkyWalking, CAT, and scheduling/orchestration systems.
• Experience building or promoting core frameworks in large-scale companies is preferred.
• Familiar with common networking issues and capable of effective troubleshooting.
• CEX experience is mandatory.

Who We Are

About The Opportunity

What You’ll Be Doing 

• Proficiency with Java stack and JVM (memory/performance tuning, GC)
• Proficiency with developing Web Services, SOA, REST APIs, Message Queue, Distributed/Scalable Architecture
• Proficiency in Spring Framework (Spring Boot), Hibernate (or similar ORM), Maven, Git
• Design and develop 24/7 high scale APIs and distributed system, the tech stack will be on Alicloud/AWS
• Strong CS fundamentals, solid knowledge of OOP/OOD, GoF design patterns
• Write unit tests, integration tests and CI/CD scripts
• Own, monitor and improve our services in production
• Development and testing of high quality product features spanning multiple product domains
• Work with engineering managers, architects, engineers & QA to develop innovative solutions that meet market needs w.r.t functionality, performance, reliability, realistic implementation schedules and adherence to development goals and principles
• Be a technical leader; research and promote new technologies and tools
• Face technical challenges - performance, fault-tolerance, security and live production issues
• Be involved throughout our service life cycle, influence every step of the way

What We Look For In You

• Min. 5+ years of experience in Software Development
• Possess a solid foundation in Java, with a deep understanding of JVM configuration optimisation strategies and tuning, IO, multi-threading, concurrency frameworks, common data structures, algorithms, and design patterns
• Good programming specifications and rich work experience
• Familiar with mainstream open-source application frameworks, such as SpringBoot, SpringMVC, Mybatis, SpringCloud, etc.
• Experience with MySQL, Oracle, and other databases, with an in-depth understanding of things, locks, indexes, database and SQL optimisation, design methods such as sub-database sub-table, leader/follower synchronization
• Familiar with common middleware, such as Kakfa, ELK, Hologres, etc.
• Possess a deep understanding of the design principles of common caching systems, such as Memcached, Redis, etc. and be able to accurately choose caching solutions
• Have a good understanding of distributed system principles, including CAP, consistency, idempotent operation, etc.
• Work well in a team environment and be able to effectively drive cross-team solutions that have complex dependencies and requirements
• Results-oriented, self-learner, problem solver with 'can do' attitude
• Clear logic, quick thinking and good communication skills
• Bilingual is highly preferred (Mandarin and English) as the team will be working with stakeholders in different regions

Nice-To-Have 

• Already or are eager to become an expert in the blockchain and cryptocurrency landscape and will understand how speculators, traders, digital asset exchanges, blockchain money services businesses and financial institutions operate
• Experience working in a disruptive technology, successfully launching products, ideally, within FinTech, eCommerce, SaaS, AdTech, or Digital Wallet business experience
• A history (and preference) of being both strategic, analytical and execution-oriented
• Familiarity with product management processes and tools
• Experience working with teams across different time zones

Perks & Benefits 

• Competitive total compensation package
• L&D programs and education subsidy for employees' growth and development
• Various team building programs and company events
• Wellness and meal allowances
• Comprehensive healthcare schemes for employees and dependants
• More that we love to tell you along the process!
  
  Please note that Hong Kong is a group-level service hub, and OKX does not carry on a business of operating a virtual asset trading platform in Hong Kong.
  
  
  
  

Perks & Benefits

• Competitive total compensation package
• L&D programs and education subsidy for employees' growth and development
• Various team building programs and company events
• Wellness and meal allowance
• Comprehensive healthcare schemes for employees and dependants
• More that we love to tell you along the process!

Please note that Hong Kong is a group-level service hub, and OKX does not carry on a business of operating a virtual asset trading platform in Hong Kong.

About the Opportunity

What You’ll Be Doing:

What We Look For In You: 

• Competitive total compensation
• Comprehensive insurance coverage for employees and their dependants
• More that we love to tell you along the process!

Disclaimer: Please note that Hong Kong is a group-level service hub, and OKX does not carry on a business of operating a virtual asset trading platform in Hong Kong.

#LI-DNI #LI-ONSITE

Summary: Join a cutting-edge decentralized exchange (DEX) team as a Developer, where you will focus on enhancing cross-chain liquidity and optimizing swap processes. Your expertise will drive the development of API services and the implementation of trade routing logic to ensure seamless operations.

Responsibilities:

• Develop and maintain API services to support decentralized exchange functionalities.
• Design and implement trade routing logic to optimize cross-chain swaps.
• Collaborate with cross-functional teams to integrate new features and improvements.
• Monitor and enhance the performance and reliability of existing systems.
• Troubleshoot and resolve issues related to trade execution and API functionalities.

Required Skills:

• Proven experience in Node.js or Python development.
• Strong understanding of SQL databases and Redis for data management.
• Experience with decentralized exchange systems and cross-chain protocols is a plus.
• Ability to work independently and collaboratively in a fast-paced environment.
• Excellent problem-solving skills and attention to detail.

核心职责

• 交易架构设计： 主导去中心化交易平台（DEX）后端架构的演进，构建稳定、可扩展的分布式系统。

• 核心引擎开发： 负责撮合逻辑、订单簿维护、实时行情分发及风控清算等关键交易模块的研发。

• 接入与数据服务： 开发高性能交易网关（支持 REST 与 WebSocket）及低延迟的 K 线数据服务。

• 极致性能优化： 针对高频交易场景进行系统调优，确保在极端高并发下的毫秒级响应与稳定性。

• 基座能力建设： 完善数据持久化方案、全链路监控、多维度备份及容灾恢复等基础工程建设。

任职要求

• 深厚技术背景： 拥有 8 年以上 Java 开发经验，精通底层并发编程、内存模型及 JVM 深度调优。

• 行业实战经验： 具备 3 年以上交易所核心系统开发背景，对清结算、资产流转及撮合流程有深刻理解。

• 高性能架构： 熟练运用 LMAX Disruptor、Chronicle 等低延迟框架，具备独立主导复杂子系统的经验。

• 数据存储专家： 精通关系型与非关系型数据库设计（如 MySQL, Redis, MongoDB），擅长分库分表及高可用方案。

• 云原生基础设施： 熟练掌握容器化部署（K8s）与主流公有云架构（AWS/Aliyun），具备实时流处理（Kafka）实战能力。

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 security.

Key Responsibilities

• Architectural Leadership: Design and develop the core server-side architecture for a Decentralized Exchange (DEX).

• Core Module Engineering: Lead the implementation of critical modules, including matching engines, order books, market data broadcasting, risk management, and clearing/settlement systems.

• Infrastructure & Connectivity: Develop and maintain high-performance trading gateways (REST/WebSocket), market data feeds, and K-line services.

• Performance Optimization: Ensure the stability and performance of high-concurrency, low-latency trading systems through rigorous JVM tuning and system-level optimizations.

• Resilience & Security: Build foundational capabilities for data persistence, comprehensive logging, automated backups, and robust disaster recovery protocols.

• Cross-Functional Collaboration: Partner closely with Smart Contract and Frontend teams to ensure seamless end-to-end integration across the entire trading lifecycle.

Required Qualifications & Skills

• Educational Background: Bachelor’s degree or higher in Computer Science, Software Engineering, or a related technical field.

• Java Expertise: 8+ years of professional Java development experience, with mastery of multi-threading, concurrency models, and JVM performance tuning.

• DEX Domain Knowledge: 3+ years of direct experience in DEX/Exchange server-side development, with a deep understanding of matching, clearing, and risk control workflows.

• High-Performance Frameworks: Proven experience with LMAX Disruptor, Chronicle, or similar high-performance frameworks; familiarity with Exchange-core architectures is essential.

• Data Management: Expertise in MySQL, Redis, and MongoDB, including advanced database design, index optimization, and distributed transaction management.

• System Reliability: Deep understanding of multi-active database deployments and disaster recovery; ability to lead team-wide emergency drills.

• Messaging & Streaming: Proficiency in Kafka (consumer groups, partitioning, persistence) and real-time data processing.

• Cloud & DevOps: Hands-on experience with Docker and Kubernetes (Deployment, Service, Ingress, Monitoring); proficiency with AWS or Alibaba Cloud ecosystems (EC2/ECS, RDS, OSS).

Preferred Attributes (Bonus)

• Experience with EVM-based on-chain settlement, Oracles, and off-chain data integration.

• Familiarity with modern observability stacks, including Prometheus, Grafana, and ELK.

• Polyglot capabilities: Ability to develop stable auxiliary services in Golang or Node.js for on-chain data retrieval and analysis.

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 security.

Key Responsibilities

• Architectural Leadership: Design and develop the core server-side architecture for a Decentralized Exchange (DEX).

• Core Module Engineering: Lead the implementation of critical modules, including matching engines, order books, market data broadcasting, risk management, and clearing/settlement systems.

• Infrastructure & Connectivity: Develop and maintain high-performance trading gateways (REST/WebSocket), market data feeds, and K-line services.

• Performance Optimization: Ensure the stability and performance of high-concurrency, low-latency trading systems through rigorous JVM tuning and system-level optimizations.

• Resilience & Security: Build foundational capabilities for data persistence, comprehensive logging, automated backups, and robust disaster recovery protocols.

• Cross-Functional Collaboration: Partner closely with Smart Contract and Frontend teams to ensure seamless end-to-end integration across the entire trading lifecycle.

Required Qualifications & Skills

• Educational Background: Bachelor’s degree or higher in Computer Science, Software Engineering, or a related technical field.

• Java Expertise: 8+ years of professional Java development experience, with mastery of multi-threading, concurrency models, and JVM performance tuning.

• DEX Domain Knowledge: 3+ years of direct experience in DEX/Exchange server-side development, with a deep understanding of matching, clearing, and risk control workflows.

• High-Performance Frameworks: Proven experience with LMAX Disruptor, Chronicle, or similar high-performance frameworks; familiarity with Exchange-core architectures is essential.

• Data Management: Expertise in MySQL, Redis, and MongoDB, including advanced database design, index optimization, and distributed transaction management.

• System Reliability: Deep understanding of multi-active database deployments and disaster recovery; ability to lead team-wide emergency drills.

• Messaging & Streaming: Proficiency in Kafka (consumer groups, partitioning, persistence) and real-time data processing.

• Cloud & DevOps: Hands-on experience with Docker and Kubernetes (Deployment, Service, Ingress, Monitoring); proficiency with AWS or Alibaba Cloud ecosystems (EC2/ECS, RDS, OSS).

Preferred Attributes (Bonus)

• Experience with EVM-based on-chain settlement, Oracles, and off-chain data integration.

• Familiarity with modern observability stacks, including Prometheus, Grafana, and ELK.

• Polyglot capabilities: Ability to develop stable auxiliary services in Golang or Node.js for on-chain data retrieval and analysis.