Senior Java Engineer

Responsibilities

• Lead the design and implementation of highly scalable, secure backend services for OKX Wallet and payment infrastructure
• Build and maintain robust interfaces with the EVM ecosystem and emerging high-performance chains such as Solana, Sui, and Aptos
• Develop secure and efficient transaction processing systems that merge traditional payment reliability with blockchain transparency
• Act as a technical pillar for the team by identifying and resolving complex production issues, performance bottlenecks, and security vulnerabilities
• Drive the adoption of Account Abstraction (AA) and other cutting-edge EIPs to enhance the user experience of decentralized finance

Requirements

• Extensive experience in Java development with a proven track record of managing high-traffic, mission-critical production environments
• Deep expertise in the EVM ecosystem, including on-chain data structures, transaction lifecycles, and smart contract interactions
• Familiarity with Go or Rust to support multi-language infrastructure
• Strong passion for crypto and staying updated on the latest DeFi trends and dApps
• Proactive ownership and the ability to thrive in a fast-paced, evolving environment

Preferred Qualifications

• Deep understanding of Account Abstraction (ERC-4337), EIP-7702, or MPC/TSS wallet architectures
• Hands-on experience with non-EVM chains like Solana, Sui, or Aptos
• Prior background in traditional FinTech, clearing/settlement systems, or payment gateways
• Ability to contribute to Rust or Go-based microservices

Benefits

• Competitive total compensation
• Comprehensive insurance coverage for employees and their dependents

About the Company

OKX is a leading crypto exchange and the developer of OKX Wallet, providing millions of users access to crypto trading and decentralized applications (dApps). We are a trusted brand for large institutions and are committed to the future of crypto and individual financial freedom.