Senior/Staff Engineer, Fraud Risk

Responsibilities

• Design, develop, and maintain high-scale backend microservices and distributed systems for real-time fraud monitoring.
• Implement event data stream ingestion to support near real-time fraud rule setups.
• Build and optimize 24/7 high-scale APIs using Java and the Spring Framework on cloud infrastructure (AWS/Alicloud).
• Act as a technical leader by researching new technologies, promoting best practices, and solving complex performance and security challenges.
• Own the full service lifecycle, including writing unit/integration tests, CI/CD scripting, and monitoring production services.
• Collaborate with architects, engineers, and QA to deliver innovative, data-driven solutions for the risk ecosystem.

Requirements

• Minimum of 5+ years of professional software development experience.
• Deep proficiency in Java, including JVM tuning (memory/performance, GC), multi-threading, and concurrency.
• Strong experience with Spring Framework (Spring Boot), Hibernate, and Maven.
• Solid understanding of distributed system principles (CAP theorem, consistency, idempotency).
• Hands-on experience with relational databases (MySQL, Oracle) including optimization, indexing, and locking.
• Familiarity with middleware and caching technologies such as Kafka, ELK, Redis, or Memcached.
• Strong computer science fundamentals, including OOP/OOD and design patterns.
• Excellent problem-solving skills and the ability to drive cross-team solutions in a fast-paced environment.

Preferred Qualifications

• Bilingual proficiency in Mandarin and English.
• Experience in FinTech, eCommerce, SaaS, or the digital wallet industry.
• Deep interest or existing expertise in the blockchain and cryptocurrency landscape.
• Experience working with distributed teams across different time zones.

Benefits

• Competitive total compensation package.
• Learning and development programs and education subsidies.
• Comprehensive healthcare schemes for employees and dependents.
• Wellness and meal allowances.
• Various team-building programs and company events.

About the Company

OKX is a leading crypto exchange and the developer of OKX Wallet, providing millions of users with access to crypto trading and decentralized applications (dApps). We are a trusted brand for large institutions, backed by our Proof of Reserves, and driven by our core principles: We Before Me, Do the Right Thing, and Get Things Done.