Java Developer

Responsibilities

• Participate in the development and maintenance of core backend systems, including matching, order management, market data, clearing, and settlement
• Develop high-performance, scalable microservices using Spring Boot
• Design and implement distributed caching and state synchronization mechanisms using Hazelcast to ensure low-latency communication
• Build highly available messaging systems using Kafka for critical modules like order flows and matching notifications
• Optimize database and caching architectures to ensure stability and throughput under high-concurrency trading scenarios
• Integrate with blockchain-related modules, including deposits, withdrawals, and wallet systems
• Write technical documentation and participate in code reviews and system refactoring

Requirements

• Bachelor’s degree in Computer Science or a related field
• 3+ years of Java backend development experience
• Strong proficiency in Java and microservice architectures using Spring Boot and Spring Cloud
• Hands-on experience with Hazelcast, including data partitioning and distributed locks
• Familiarity with Kafka or other message middleware in distributed systems
• Proficiency in MySQL, Redis, and MongoDB
• Knowledge of Git, Maven, Docker, and CI/CD workflows
• Strong coding standards and ability to solve complex problems independently

Preferred Qualifications

• Experience in designing high-concurrency, low-latency system architectures
• Experience with high-performance messaging components such as Aeron, Chronicle Queue, or Disruptor
• Familiarity with cloud-native technologies like Kubernetes, Helm, and service mesh
• Previous experience with exchange system development, matching logic, or risk control
• Understanding of blockchain principles and on-chain interaction

About the Company

OneBullEx is a next-generation crypto futures exchange built for speed, reliability, and innovation. Our platform delivers advanced trading capabilities, including AI-powered automated trading systems that enable high-precision strategies. By leveraging cutting-edge AI and machine learning, we deliver real-time, high-performance trading even during periods of extreme market volatility.