Senior Java Backend Engineer (DEX)

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. Offices: Hong Kong (Hong Kong);