Senior Java Backend Engineer (Web3)

TL;DR

Senior Java Backend Engineer (Web3): Building and scaling next-generation earn and lending solutions for a global crypto exchange with an accent on high-performance backend services and stablecoin yield distribution. Focus on designing high-concurrency systems, optimizing token allocation mechanisms, and integrating AI-assisted development tools to boost productivity.

Location: Hong Kong, Singapore

Company

OKX is a leading crypto exchange and developer of the OKX Wallet, providing millions of users with access to crypto trading and decentralized applications.

What you will do

• 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 new token launches.
• Implement backend systems for stablecoin yield distribution and settlement.
• Collaborate with Product, Design, Risk, and Quant teams to deliver innovative earn and lending features.
• Participate in on-call production support and incident response to ensure platform stability.

Requirements

• Minimum 3 years of backend development experience in financial or related industries.
• Proficiency in Java, SpringBoot, and SpringCloud.
• Strong understanding of multi-threading, concurrency control, and distributed system design for high-performance systems.
• Experience with Kafka, Redis, Kubernetes (K8s), and relational databases such as MySQL.
• Fluency in English and Mandarin is required.
• Proficiency in AI-assisted development tools (e.g., Codex, Claude Code) is a mandatory requirement.

Nice to have

• Hands-on experience building earn or loan products, including interest accrual and risk control.
• Familiarity with stablecoin mechanics (USDT, USDC) and yield settlement systems.
• Experience building token launch, quota allocation, or subscription systems.

Culture & Benefits

• Competitive total compensation package.
• L&D programs and education subsidies for professional growth.
• Comprehensive healthcare schemes for employees and dependents.
• Wellness and meal allowances.
• Various team building programs and company events.