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Senior/Staff Software Engineer, Fraud Risk
OKX
Accounting & Finance, Software Engineering
Singapore
Posted on Oct 15, 2025
OKX will be prioritising applicants who have a current right to work in Singapore, and do not require OKX's sponsorship of a visa
About OKX
At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me, Do the Right Thing, and Get Things Done. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more.
About The Opportunity
We are looking for a Senior/Staff Software Engineer to join our Fraud Risk team!
This role offers the chance to make an early and significant impact on our platform. You will drive key initiatives, and be responsible for the implementation and support of backend microservices, collaborating with frontend and cross-functional teams to coordinate complex deliverables and conducting research and providing meaningful technical feedback to influence team decisions.
Following are some domains you will have opportunities to work with:
- Real-time fraudulent monitoring with highly configurable rules
- Event data stream ingestion which supports near real-time fraud rules setup
- Advanced A/B testing capabilities for our customers so they can leverage greedy algorithms and fight fraud
- Powerful tools and innovative data science driven solutions for business user
- Full feature risk ecosystem
What You’ll Be Doing
- Apply deep proficiency with the Java stack and JVM (including memory/performance tuning and GC).
- Design and optimize Web Services, SOA, REST APIs, Message Queue systems, and Distributed/Scalable Architectures.
- Proficiency in Spring Framework (Spring Boot), Hibernate (or other similar ORM), Maven, Git.
- Design and develop 24/7 high-scale APIs and distributed systems; the tech stack will be on Alicloud/AWS.
- Leverage strong CS fundamentals and a solid knowledge of OOP/OOD and 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.
- Collaborate with engineering managers, architects, engineers, and QA to develop innovative solutions that meet market needs regarding 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 the entire service life cycle, influencing every step of the process.
What We Look For In You
- 5+ years of experience in Software Development.
- Solid foundation in Java, with a deep understanding of JVM configuration optimization strategies and tuning, I/O, multi-threading, concurrency frameworks, common data structures, algorithms, and design patterns.
- Familiarity with mainstream open-source application frameworks, such as SpringBoot, SpringMVC, Mybatis, and SpringCloud.
- Experience with MySQL, Oracle, and other databases, with an in-depth understanding of transactions, locks, indexes, database and SQL optimization, and design methods such as sub-database/sub-table, and leader/follower synchronization.
Nice-To-Haves
- Familiarity with common middleware (e.g., Kafka, ELK, Hologres) and a deep understanding of caching system principles (e.g., Memcached, Redis).
- Good understanding of distributed system principles (e.g., CAP, consistency, idempotent operations).
- Ability to work well in a team environment and effectively drive cross-team solutions.
- Results-oriented, self-learner, and problem solver with clear logic and good communication skills.
- Experience working with disruptive technology (e.g., FinTech, eCommerce, SaaS) and a deep understanding of the blockchain/cryptocurrency landscape.
- A history of being both strategic, analytical, and execution-oriented, with experience working with teams across different time zones.
- Proficiency in speaking, reading and writing in both English and Mandarin to collaborate effectively with global and cross-functional team members
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!
#LI-ML1 #LI-ONSITE
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