Web3 Security Engineer, Smart Contract Audit

Okx

Hong Kong, Hong Kong SAR (Hong Kong ) permanent

Posted: January 22, 2026

Quick Summary

We are looking for a Web3 Security Engineer to join our team in Hong Kong, Hong Kong SAR (Hong Kong). The ideal candidate will have expertise in smart contract security and auditing, with a strong understanding of blockchain technology and a passion for crypto. The successful candidate will be responsible for conducting security audits on smart contracts and providing recommendations for improvement.

Job Description

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.

About the Team

The Web3 Security Team provides security audit services for various Web3 smart contracts developed internally by OKX and conducts security audits for tokens to be listed on the exchange. Additionally, we are responsible for developing various Web3 security tools to ensure the safety of OKX Web3 wallet users.

What You’ll Be Doing

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Provide audit services and security guidance for various Web3 smart contracts.

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Conduct audit services for tokens to be listed on the exchange.

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Handle various security incidents and collaborate with the branding team for external communication.

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Research risk control mechanisms of various DeFi protocols to enhance the security of smart contracts.

What We Look For In You

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Solid STEM (Science, Technology, Engineering, Mathematics) educational background.

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Exceptional logical thinking and problem-solving skills.

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Familiarity with at least one major blockchain platform, such as Ethereum, Solana, Aptos, or TON, and proficiency in its respective smart contract mechanisms.

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Strong understanding of common vulnerabilities in DeFi protocols and their attack vectors, with the ability to analyze and handle attack incidents.

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Experience auditing various mainstream DeFi protocols (DEX, Lending, Farming, Derivatives).

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Ability to clearly write audit reports, detailing the causes of vulnerabilities, attack scenarios, and recommended fixes.

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Interest in the rapid evolution and emerging technologies in blockchain space, with a willingness to continuously learn and actively track on-chain attack incidents.

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Skilled in communicating technical issues with development teams and project stakeholders.

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High sense of responsibility, adherence to industry ethical standards, and commitment to ensuring the confidentiality and impartiality of audit work.

Perks & Benefits

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Competitive total compensation package

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

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Various team building programs and company events

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Wellness and meal allowances

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Comprehensive healthcare schemes for employees and dependants

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More that we love to tell you along the process!

Notice:

All official OKX vacancies are published on this website. While roles may appear on selected third-party platforms from time to time, information on other sites may be inaccurate or outdated. If in doubt, please apply directly through our official careers website.

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.

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