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Sr. Security Engineer (Penetration Testing)

CertiK· Blockchain Security Engineering
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Remote$100k - $180kFull-timePosted 7mo ago

About the role

Senior security engineer focused on penetration testing and security-related services intersecting cybersecurity and blockchain, including security consulting, reviews, auditing, verification, and pentesting for blockchain applications and smart contracts. Remote, full-time role with opportunities to contribute to R&D and community tooling.

Responsibilities

  • Perform security assessments on web, mobile, thick client applications, and browser extensions
  • Conduct external and internal network penetration tests
  • Perform security source code reviews
  • Perform cloud security reviews
  • Develop comprehensive pentest reports for both technical and non-technical audiences
  • Research and develop innovative techniques, tools, and methodologies for pentesting applications in the blockchain space
  • Contribute to the community by developing tools, presentations, and blog posts

Qualifications

  • Passionate about cryptocurrency, DeFi, and blockchain, with a willingness to learn Web3 technologies such as smart contracts
  • Minimum of 4 years of experience in application security and penetration testing
  • Experienced in source code review for different languages, with a strong understanding of JavaScript and TypeScript
  • Experienced in mobile application penetration testing
  • Familiar with cloud platforms and their security risks, such as AWS, Azure, and GCP
  • Experience in programming with scripting languages such as Python and Bash
  • Solid understanding of cryptography
  • BS/MS/PhD in Computer Science or Information Security
  • Strong spoken and written communication skills

Skills

Required:Web, mobile, thick client application securityNetwork penetration testingSource code reviewCloud securityScripting and programmingCryptographyCommunication

Benefits

  • Medical, vision, and dental insurance
  • 401(k) plan with company matching
  • Life and accidental death and dismemberment insurance
  • HSA (with high deductible plan)
  • FSA
  • Flexible paid time off and holidays
  • Variable commission program for business development sales roles
Last updated Oct 23, 2026. Interested? Apply on the company site.

About CertiK

Largest Blockchain Security Auditor - CertiK

CertiK, the largest Web3 security service provider, uses AI and formal verification to protect and monitor smart contracts and protocols, securing the Web3 ecosystem.

Smart Contract AuditSmart Contract SecurityDeFiBlockchain AuditCrypto SecuritySecurity Audit
Company profileWebsite

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