Senior Security Engineer

About the Company

About the Company

Born from groundbreaking research at Columbia University and Yale University, Certi

K 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, Certi

K 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, Certi

K 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.

The primary responsibility of this role is for Certi

K’s security‑related services. Intersecting cybersecurity and blockchain, Certi

K’s security offerings include security consulting, security reviews, security auditing of smart contracts and blockchains, verification of smart contracts, penetration testing, and more. We are looking to hire someone with a passion for application security and penetration testing. This is a fun and challenging full‑time position. If you are excited about hacking, threat modeling, scanning, auditing, designing, and enhancing the security of applications across the board then you will thrive in this role.

While you work with clients, we will also provide you with plenty of opportunities to get involved with research and development efforts to help us raise the standards of blockchain security.

• 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.

• 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.

Target annual salary compensation for this role performed is $130,000 to $163,000. The exact compensation at which this job is filled will be determined by the skills and experience of qualified candidates.

Certi

K is proud to offer medical, vision, and dental insurance, 401(k) plan with company matching, life and accidental death and dismemberment insurance, HSA (with high deductible plan), FSA, and other benefits to all full‑time employees, along with flexible paid time off and holidays. Certi

K also offers a variable commission program for business development sales roles.

In compliance with federal law, all persons hired will be required to verify identity and eligibility to work in the United States and to complete the required employment eligibility verification form upon hire.

Certi

K is proud to be an equal opportunity employer. We will not discriminate against any applicant or employee on the basis of age, race, color, creed, religion, sex, sexual orientation, gender, gender identity or expression, medical condition, national origin, ancestry, citizenship, marital status or civil partnership/union status, physical or mental disability, pregnancy, childbirth, genetic information, military and veteran status, or any other basis prohibited by applicable federal, state or local law.

Certi

K will consider for employment qualified applicants with criminal histories in a manner consistent with local and federal requirements.

All Certi

K employees are expected to actively support diversity on their teams, and in the Company.