Staff Software Engineer, Fraud Risk

Who We Are At OKX, we believe that the future will be reshaped by Crypto, ultimately contributing to every individual's freedom. OKX began as a crypto exchange giving millions of people access to crypto trading and over time becoming among the largest platforms in the world. In recent years, we have developed one of the most connected Web3 wallets used by millions to access decentralized crypto applications (dApps). OKX is a trusted brand by hundreds of large institutions seeking access to crypto markets on a reliable platform that seamlessly connects with global banking and payments. In the last year, OKX has expanded into new markets including Australia, Brazil, Netherlands, Singapore and Turkey, with plans to launch in the US, Belgium and the UAE. We are deeply committed to shaping a fairer, more transparent and accessible society through blockchain technology. This is why we publish proof of reserves monthly, and continue to ship new innovative security features. About the Opportunity We are seeking Software Engineers to join our rapidly growing Fraud Risk team. In this role, you'll have a direct and early impact on our engineering efforts in the US. You will be responsible for building and maintaining backend microservices, collaborating with cross-functional teams, and contributing to critical decisions. Here's what you'll have the opportunity to work on: Real-time fraud monitoring with configurable rules Event data stream ingestion that supports near real-time fraud detection Advanced A/B testing for fraud detection using machine learning algorithms Tools powered by data science to help our business users combat fraud effectively A comprehensive risk ecosystem to protect our platform What You'll Be Doing Designing and developing high-scale APIs and distributed systems on Alicloud/AWS using Java and Spring Boot Applying strong CS fundamentals like OOP, design patterns, and performance optimization strategies Developing and optimizing REST APIs, SOA, and distributed architectures Writing unit tests, integration tests, and CI/CD pipelines to ensure seamless deployments Owning, monitoring, and improving services in production for high availability and reliability Collaborating with cross-functional teams to deliver features that meet market needs in terms of functionality, performance, and reliability Facing challenges like performance tuning, fault-tolerance, and handling live production issues Leading and mentoring other engineers, researching and promoting new technologies, and contributing to the team's growth What We Look For In You 5 years of software development experience, with deep knowledge of Java, JVM tuning, and multi-threading Experience with Spring Boot, SpringCloud, Hibernate, and message queue systems Proficiency with SQL databases like MySQL and Oracle, and knowledge of database optimization Familiarity with middleware like Kafka, ELK, and Redis Strong understanding of distributed systems principles, including CAP, consistency, and fault tolerance Ability to work effectively in cross-functional teams and manage complex dependencies A problem-solver with clear logic, fast thinking, and excellent communication skills Fluent in both Mandarin and English Nice to Haves Experience in the blockchain/cryptocurrency industry Background in disruptive technologies such as FinTech, eCommerce, SaaS, or AdTech Familiarity with product management processes Experience working with teams across offices and 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 Comprehensive healthcare schemes for employees and dependents The salary range for this position is $238,518 to $273,923. The salary offered depends on a variety of factors, including job-related knowledge, skills, experience, and market location. In addition to the salary, a performance bonus and long-term incentives may be provided as part of the compensation package, as well as a full range of medical, financial, and/or other benefits, dependent on the position offered. Applicants should apply via OKX internal or external careers site. OKX is committed to equal employment opportunities regardless of race, color, genetic information, creed, religion, sex, sexual orientation, gender identity, lawful alien status, national origin, age, marital status, and non-job related physical or mental disability, or protected veteran status. Pursuant to the San Francisco Fair Chance Ordinance, we will consider employment-qualified applicants with arrest and conviction records.