Staff Senior Java Engineer OKX Wallet Web3
OKX is a leading global cryptocurrency exchange offering a wide range of trading services, including spot and derivatives trading, as well as Web3 solutions.
Maintainer signals as of 8/14/2026
Investors
Projects
About OKX
OKX is a global cryptocurrency exchange known for its trading services and financial products. The platform offers a wide range of features, including spot and derivatives trading, staking services, and a user-friendly interface suitable for both beginners and experienced traders.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will own core wallet backend modules covering address management, asset synchronization, transaction construction, broadcasting, confirmations, gas estimation, nonce management, and transaction-state tracking. You will build multi-chain transaction scenarios, support new chain integrations, improve operational stability, troubleshoot production issues, drive projects to delivery, and raise engineering quality.
Requirements
- Approximately 5–10 years of Java backend experience
- Strong Java fundamentals including collections, concurrency, thread pools, JVM, networking, and performance
- Proficiency with Spring Boot, Spring Cloud, MyBatis, or comparable frameworks
- Experience designing complex or high-concurrency systems
- Knowledge of idempotency, retries, compensation, caching, message queues, distributed locks, consistency, rate limiting, and service degradation
- Blockchain or wallet experience
- Knowledge of addresses, keys, mnemonics, signing, broadcasting, confirmations, gas, and nonce
- Familiarity with EVM, Tron, or Solana and ERC-20 or TRC-20
- High security awareness involving keys, signing, permissions, authentication, and sensitive data
- Production troubleshooting using logs, metrics, tracing, and thread or memory analysis
- Willingness to use and evaluate AI coding tools
Responsibilities
- Own wallet backend modules
- Build address management, asset synchronization, transaction, broadcasting, confirmation, gas, nonce, and state-tracking capabilities
- Build transfers, token approvals, contract interactions, cross-chain, swaps, DApp connections, and signature-request scenarios
- Support EVM, Tron, Solana, and new chain integrations
- Monitor and improve stability through alerting, rate limiting, retries, degradation, compensation, and reconciliation
- Investigate incidents and fix root causes
- Drive projects from design through launch
- Coordinate dependencies across product, QA, frontend, infrastructure, and backend teams
- Participate in design discussions, code reviews, and system optimization
- Document technical decisions and incident learnings
- Use AI coding tools for development, testing, review, troubleshooting, refactoring, and documentation
Benefits
- Comprehensive insurance coverage for employees and dependants