Senior Java Engineer: DeFi Backend & AI Platform

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

Job summary

OKX is building the next generation of open platforms at the intersection of Web3 and AI. We are seeking an experienced backend engineer to design, build, and optimize the Wallet Earn on-chain aggregated investment platform.

You will own architecture for critical services, ensure high availability, and push the boundaries of DeFi, AI Agents, and Web3 infrastructure, collaborating with product and security teams to deliver reliable, scalable systems.

Qualifications

• Solid Java fundamentals with Spring Boot and Spring Cloud.
• Hands-on experience with MySQL, Redis, MQ, RPC.
• Proven experience building high-concurrency, high-availability distributed systems.
• Familiarity with DeFi protocols and on-chain concepts; smart contract basics preferred.
• Strong ownership, communication, and collaboration in fast-moving teams; interest in Web3, DeFi, or AI Agents.

Responsibilities

• Design, build, and optimize the backend architecture for Wallet Earn on-chain aggregated investment platform.
• Design and build the aggregated-investment risk control platform, ensuring system stability, fund safety, and business scalability.
• Continuously improve protocol integration capabilities, raising onboarding efficiency and R&D velocity.
• Contribute to the multi-chain user asset/position platform, ensuring real-time data accuracy across major chains and DeFi protocols.
• Contribute to the AI Agent Marketplace core platform, owning the architecture and development of Agent, Task, and Order modules.
• Own stability across core business flows to ensure high availability and performance; diagnose and resolve production issues.
• Continuously improve system architecture, code quality, monitoring/alerting, observability, and exception-compensation capabilities to strengthen reliability.

Skills

Java

Spring Boot

Spring Cloud

Distributed systems

System architecture design

Performance tuning

Log analysis

Ownership & accountability

Web3/DeFi interest

Communication

Tools

MySQL

Redis

MQ

RPC

On-chain integration

Job description

OKX is building the next generation of open platforms at the intersection of Web3 and AI. We are seeking an experienced backend engineer to design, build, and optimize the Wallet Earn on-chain aggregated investment platform.

You will own architecture for critical services, ensure high availability, and push the boundaries of DeFi, AI Agents, and Web3 infrastructure, collaborating with product and security teams to deliver reliable, scalable systems.