Web3 Security Engineer (Onchain Monitor)

Who We Are

At OKX, we believe that the future will be reshaped by crypto, and ultimately contribute to every individual's freedom. OKX is a leading crypto exchange, and the developer of OKX Wallet, giving millions access to crypto trading and decentralized crypto applications (dApps). OKX is also a trusted brand by hundreds of large institutions seeking access to crypto markets. We are safe and reliable, backed by our Proof of Reserves. Across our multiple offices globally, we are united by our core principles: We Before Me, Do the Right Thing, and Get Things Done. These shared values drive our culture, shape our processes, and foster a friendly, rewarding, and diverse environment for every OK-er. OKX is part of OKG, a group that brings the value of Blockchain to users around the world, through our leading products OKX, OKX Wallet, OKLink and more.

Job Summary

We are looking for a Blockchain Security and Monitoring Engineer to join our team, responsible for developing an AML (Anti-Money Laundering) on-chain monitoring system and blockchain security defense system based on Spring Boot. This role will focus on tracking and analyzing hacker addresses, as well as using Revm sandbox environments to deeply simulate attack vectors and analyze risks through MEV economic models. You will provide comprehensive security support for financial institutions, blockchain projects, and law enforcement agencies.

Roles & Responsibilities

Implement a blockchain monitoring backend system based on Spring Boot

Develop on-chain hacker address identification and tracking algorithms and alert systems to monitor suspicious transaction activities in real-time

Build transaction relationship graphs to visualize fund flows

Integrate multi-chain monitoring capabilities covering major public chains (ETH, BTC, BSC, etc.)

Build sandbox environments based on Revm to simulate on-chain transaction execution processes and detect potential vulnerabilities and MEV-related risks

Establish a real-time alert system for monitoring high-risk operations across multiple dimensions, such as abnormal gas consumption, permission changes, fund flows, etc.

Research cutting-edge attack methods, optimize detection rule sets, and generate security incident analysis reports

Requirements

Bachelor's/Master's degree in Computer Science, Network Security, or related technical field

Proficiency in at least one mainstream language (Java/Python/Rust)

3+ years of Java development experience, proficient in Spring Boot, Spring Cloud, and other frameworks

Proficient in Kafka, Redis, Elasticsearch technology stack, with experience using relational databases (MySQL)

Knowledge of using Python/Rust for building blockchain analyzers (such as Revm-based sandboxes)

Understanding of Revm - including simulating attack POCs and sandbox environment testing

Plus Points

Experience in Anti-Money Laundering (AML) or blockchain security analysis

Relevant experience and achievements in on-chain risk analysis - including real-time threat detection, incident analysis, etc.

Deep understanding of mainstream DeFi protocols

Contributions to open-source blockchain security tools or research

MEV expertise - analyzing front-run and back-run patterns, designing anti-MEV protocols

Familiarity with at least one mainstream blockchain platform (such as Ethereum, Solana, etc.) and proficiency in its smart contract mechanisms

Profound understanding of common vulnerabilities in DeFi protocols and their attack methods, capable of analyzing and handling attack incidents

Perks & Benefits

Competitive total compensation package

L&D programs and Education subsidy for employees' growth and development

Various team building programs and company events

Wellness and meal allowances

Comprehensive healthcare schemes for employees and dependants

More that we love to tell you along the process!

Information collected and processed as part of the recruitment process of any job application you choose to submit is subject to OKX's Candidate Privacy Notice.