Senior Security Engineer

About the Company
Born from groundbreaking research at Columbia University and Yale University, CertiK is a leading Web3 security company focused on securing blockchain protocols, smart contracts, and decentralized applications through cutting-edge security research, formal verification, and AI-powered technology. Founded in 2017 and headquartered in New York City, CertiK provides end-to-end security solutions including smart contract audits, penetration testing, on-chain monitoring, incident response, and compliance services for some of the largest projects in the digital asset ecosystem.
Today, CertiK supports thousands of enterprise clients and Web3 projects globally, with a distributed international team spanning North America, Asia, and Europe. The company is backed by leading investors including Coatue, Goldman Sachs, Insight Partners, and Sequoia Capital, and has been recognized by organizations such as the World Economic Forum and CB Insights for its contributions to blockchain security innovation.
 
About You
You are proactive, reliable, and enjoy helping people solve problems. You are highly organized, eager to learn, and comfortable supporting both technical and non-technical teams. You enjoy being hands-on, can adapt quickly in a fast-paced environment, and are willing to take ownership of day-to-day operational tasks to help keep the office and systems running smoothly.

Responsibilities

• Work with external blockchain developers to audit codes & secure products (smart contracts, protocols & apps/Dapps).


• Establish/enforce security policies, manage security vulnerabilities, respond to incidents/exploits & write analysis reports.


• Monitor security breaches, defend systems from cyberattacks & provide technical consulting services in cybersecurity.


• Conduct penetration tests on web/mobile (Android & iOS) & client application, perform external/internal network security assessment.


• Review source code/security design, conduct threat modeling & provide guidance to software development teams.


• Contribute to internal security tools & create new ones for improving security services with best engineering practices.


• Use static/dynamic analyses to identify flaws or vulnerabilities in smart contracts & propose recommendations.


• Assess sandbox/VM/network/core distributed-system code, identify vulnerabilities & build PoC exploits.


• Conduct security research, publish findings in technical blog posts & speak at conferences/tech talks/X Spaces, showcasing technical expertise/insights.

Requirements

• Master’s degree in Security Informatics/Cybersecurity or a related field.


• In-depth knowledge of solidity/smart contract security/Cryptography/Blockchain technology.


• Technical expertise in Web3 security, threat/vulnerability management, penetration testing & security review for programs written in Java/JavaScript/Python/C/C++/PHP/Go.


• Familiar with cloud platforms such as AWS/Azure/GCP & proficient in Python/JavaScript.

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