Senior/Staff Engineer, Fraud Risk

OKX

Hong Kong, Hong Kong Sar
Onsite
Posted 2026-03-25

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Skills named in this job

Spring
Java
AWS
CI/CD
Git
Microservices
MySQL
Product management
REST APIs
Redis

Read from the description itself, not inferred.

This role on the market

182 open fraud roles across 53 companies are on ApplySarthi right now, most of them in Bengaluru (13), Pune (2), Mumbai (2).

Credit Card Fraud Specialist IIJPMorgan
Senior Operations Lead, FraudMission Lane
Payment Integrity Prepay Fraud Supervisor - Cigna HealthcareCigna
Staff Product Data Analyst, Fraud & SurveillanceNinjaTrader
Senior Data Modeler, Fraud Risk DetectionExperian

What fraud roles keep asking for: SQL (26%), Python (23%), Machine learning (19%) — counted across their open postings here.

AWS jobs · CI/CD jobs · Java jobs · Microservices jobs

OKX has 342 open roles listed here.

Counted across 14 company job boards, updated as roles open and close.

Preparing for this interview

Interviews for fraud roles keep coming back to SQL, Python, Machine learning. Practise those questions before you sit with OKX.

Questions you are likely to be asked

Why do you want to join OKX?
What is your experience with Spring? Tell me one thing you learned the hard way.
Walk me through a system you built. How was it designed, and what would you change now?
Tell me about a hard bug you tracked down. How did you find the cause?
How do you decide what to test, and what does good code review look like to you?

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Who We Are

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’re looking for a Software Engineer to join our Fraud Risk team!

This role will provide an early and significant impact on the engineering team. You will be expected to be responsible for such areas as implementation and support of backend microservices, working closely with the frontend and cross-functional teams to coordinate complex deliverables, do research and provide meaningful feedback about any decision being made within the team. 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

Proficiency with Java stack and JVM (memory/performance tuning, GC)
Proficiency with developing Web Services, SOA, REST APIs, Message Queue, Distributed/Scalable Architecture
Proficiency in Spring Framework (Spring Boot), Hibernate (or similar ORM), Maven, Git
Design and develop 24/7 high scale APIs and distributed system, the tech stack will be on Alicloud/AWS
Strong CS fundamentals, solid knowledge of OOP/OOD, 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
Work with engineering managers, architects, engineers & QA to develop innovative solutions that meet market needs w.r.t 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 our service life cycle, influence every step of the way

What We Look For In You

Min. 5+ years of experience in Software Development
Possess a solid foundation in Java, with a deep understanding of JVM configuration optimisation strategies and tuning, IO, multi-threading, concurrency frameworks, common data structures, algorithms, and design patterns
Good programming specifications and rich work experience
Familiar with mainstream open-source application frameworks, such as SpringBoot, SpringMVC, Mybatis, SpringCloud, etc.
Experience with MySQL, Oracle, and other databases, with an in-depth understanding of things, locks, indexes, database and SQL optimisation, design methods such as sub-database sub-table, leader/follower synchronization
Familiar with common middleware, such as Kakfa, ELK, Hologres, etc.
Possess a deep understanding of the design principles of common caching systems, such as Memcached, Redis, etc. and be able to accurately choose caching solutions
Have a good understanding of distributed system principles, including CAP, consistency, idempotent operation, etc.
Work well in a team environment and be able to effectively drive cross-team solutions that have complex dependencies and requirements
Results-oriented, self-learner, problem solver with 'can do' attitude
Clear logic, quick thinking and good communication skills
Bilingual is highly preferred (Mandarin and English) as the team will be working with stakeholders in different regions

Nice-To-Have

Already or are eager to become an expert in the blockchain and cryptocurrency landscape and will understand how speculators, traders, digital asset exchanges, blockchain money services businesses and financial institutions operate
Experience working in a disruptive technology, successfully launching products, ideally, within FinTech, eCommerce, SaaS, AdTech, or Digital Wallet business experience
A history (and preference) of being both strategic, analytical and execution-oriented
Familiarity with product management processes and tools
Experience working with teams across different 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
Wellness and meal allowances
Comprehensive healthcare schemes for employees and dependants
More that we love to tell you along the process!

Please note that Hong Kong is a group-level service hub, and OKX does not carry on a business of operating a virtual asset trading platform in Hong Kong.

Notice:

All official OKX vacancies are published on this website. While roles may appear on selected third-party platforms from time to time, information on other sites may be inaccurate or outdated. If in doubt, please apply directly through our official careers website.

Information collected and processed as part of the recruitment process of any job application you choose to submit is subject to OKX's Candidate Privacy Notice.

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Listed on greenhouse · posted 2026-03-25. ApplySarthi collects openings and links to application pages; the role is advertised by OKX, not by us.