Senior Java Backend Engineer — Crypto Lending

P2P; Hong Kong; On-site; HKD 650,000 - 950,000; Full time

Benefits offered by this job

Competitive compensation package

L&D programs and education subsidy

Team building programs and events

Wellness and meal allowances

Comprehensive healthcare for employees

Job summary

OKX is seeking a backend developer to design and implement high-performance services for earn and loan products, including Jumpstart and stablecoin yield systems. The role requires Java/SpringBoot expertise, microservices experience, and strong concurrency skills.

Ideal candidates will have 3+ years in finance-related backend work, familiarity with Kafka/Redis, Kubernetes, MySQL, and cloud/Linux. Fluency in English and Mandarin is essential for cross-functional collaboration.

Qualifications

• Minimum 3 years of backend development experience in finance or related industries.
• Proficient in AI-assisted development tools such as Codex and Claude Code.
• Experience in Microservice/API development with Java/SpringBoot/SpringCloud.
• Strong understanding of multi-threading, concurrency, and distributed systems.
• Familiarity with Kafka and Redis for messaging and caching.
• Experience with Kubernetes for container orchestration.
• Relational databases experience (MySQL or equivalent).
• Cloud-based Linux environment with production support capability.
• Fluency in English and Mandarin.

Responsibilities

• Design and develop high-performance, high-availability backend services for Simple Earn, Flash Earn, and Loan products.
• Build and maintain the Jumpstart subscription and allocation system for token launches.
• Design and implement backend systems for stablecoin yield distribution and settlement.
• Collaborate with Product, Design, Risk, and Quant teams to deliver earn and lending features.
• Participate in on-call production support and incident response to ensure platform stability.

Skills

AI-assisted development tools

Backend development

Java/SpringBoot/SpringCloud

Multi-threading & concurrency

Kafka

Redis

Kubernetes

MySQL

Cloud/Linux

English & Mandarin

Tools

Codex

Claude Code

Job description

OKX is seeking a backend developer to design and implement high-performance services for earn and loan products, including Jumpstart and stablecoin yield systems. The role requires Java/SpringBoot expertise, microservices experience, and strong concurrency skills.

Ideal candidates will have 3+ years in finance-related backend work, familiarity with Kafka/Redis, Kubernetes, MySQL, and cloud/Linux. Fluency in English and Mandarin is essential for cross-functional collaboration.