Senior/Staff Java Engineer - Web3 Wallet Defi Earn

As a Senior or Staff Java Engineer at OKX, you'll design and build the backend architecture for Wallet Earn, our on-chain aggregated investment platform, and contribute to the AI Agent Marketplace infrastructure. You'll work across two core directions: enabling seamless access to leading DeFi protocols like Aave, Morpho, Pendle, and Pancake, and building an open marketplace for AI Agents to autonomously complete tasks and collaborate in Web3.

What you'll do

• Design, build, and continuously optimize the backend architecture of the 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 both new-protocol onboarding efficiency and overall research and development velocity.
• Contribute to the multi-chain user asset and position platform, supporting asset parsing and display across major public chains and DeFi protocols; expand new protocols and asset types while keeping position data accurate, real-time, and efficient.
• Contribute to the AI Agent Marketplace core platform, owning the architecture and development of core modules such as Agent, Task, and Order, and explore integration scenarios between AI Agents and Web3.
• Own stability across core business flows to ensure high availability and high performance; independently diagnose and resolve complex production issues including performance bottlenecks, data consistency, fund safety, and edge-case business scenarios.
• Continuously improve system architecture, code quality, monitoring and alerting, observability, and exception-compensation capabilities to strengthen reliability, security, and maintainability.

What you bring

• Solid Java fundamentals with strong command of mainstream frameworks such as Spring Boot and Spring Cloud.
• Hands-on experience with common middleware including MySQL, Redis, message queues, and RPC.
• Proven experience building high-concurrency, high-availability distributed systems.
• Familiarity with the design and mechanics of major DeFi protocols (e.g., Aave, Morpho, Pendle, Pancake); understanding of smart contract fundamentals, with on-chain integration or contract development experience a plus.
• Familiarity with mainstream wallet products and account models, and a working understanding of on-chain assets and the DeFi ecosystem.
• Strong systems analysis and architecture design skills, ideally from large-scale consumer products or financial systems; able to independently own core-module design and drive complex projects to high-quality delivery.
• Ability to independently analyze and resolve complex production issues, with experience in log analysis, distributed tracing, performance tuning, fault recovery, and data-consistency governance.
• Strong sense of ownership and accountability, proactively driving problems and projects to resolution.
• Strong communication and collaboration skills, comfortable in a fast-moving business environment; genuine interest in Web3, DeFi, or AI Agents and a drive to keep exploring frontier technology.

Nice to have

• Familiarity with account models, transaction mechanics, and underlying principles of major public chains such as EVM, Solana, and Tron.
• On-chain protocol development, smart contract development, or protocol integration experience.
• Experience building high-concurrency trading systems, core financial systems, or payment systems.
• Understanding of on-chain risk control, KYT, and AML mechanisms.
• Platform development experience with AI Agents, LLMs, MCP, Function Calling, Agent-to-Agent protocols, or Workflow systems.

What we offer

• Competitive compensation and a long-term incentive plan.
• Comprehensive insurance coverage for employees and their families.
• An international team, an open engineering culture, and rich opportunities for technical growth.
• Deep involvement in frontier Web3 and AI work, building next-generation open infrastructure alongside outstanding engineers.

About OKX

OKX is a leading crypto exchange and developer of OKX Wallet, giving millions access to crypto trading and decentralized applications, as well as providing trusted services to hundreds of large institutions. Through OKX, OKX Wallet, OKX Pay, and OKLink, OKG delivers leading Web3 infrastructure and digital asset services globally.