Senior Java Engineer - Real‑Time Fraud Risk

OKX; Singapore; On-site; SGD 120,000 - 180,000; Full time

Benefits offered by this job

Competitive compensation package

Wellness and meal allowances

Healthcare schemes for employees and/​

Job summary

OKX is seeking a Java Engineer to join our Fraud Risk team in Singapore. You will work on backend microservices, real-time data streams, and 24/7 high-scale APIs on Alicloud/AWS.

You will collaborate with frontend, QA, and architects to design reliable systems and implement robust testing and deployment pipelines. You should have a strong Java stack foundation, experience with Spring and ORM tools, and a good grasp of distributed systems, performance tuning, and security.

Qualifications

• Min. 5+ years of software development experience.
• Strong Java and JVM tuning knowledge.
• Experience with SpringBoot, SpringMVC, Mybatis, SpringCloud.
• Database expertise (MySQL/Oracle) and SQL optimization.
• Familiar with Kafka, ELK, Hologres; caching (Memcached/Redis).
• Understanding distributed systems, CAP and idempotence.

Responsibilities

• Develop and maintain backend microservices with 24/7 high-scale APIs.
• Work with frontend and cross-functional teams to deliver complex features.
• Write unit/integration tests and CI/CD scripts.
• Monitor and improve production services; own deployment and reliability.

Skills

Java

JVM tuning

REST APIs

Spring Framework

Hibernate

Maven

Git

Distributed systems

GoF design patterns

OOP/OOD

Tools

MySQL

Oracle

Kafka

ELK

Hologres

Memcached

Redis

Kubernetes

AWS

Alicloud

Job description

OKX is seeking a Java Engineer to join our Fraud Risk team in Singapore. You will work on backend microservices, real-time data streams, and 24/7 high-scale APIs on Alicloud/AWS.

You will collaborate with frontend, QA, and architects to design reliable systems and implement robust testing and deployment pipelines. You should have a strong Java stack foundation, experience with Spring and ORM tools, and a good grasp of distributed systems, performance tuning, and security.