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Senior Security Engineer

Phantom makes Web3 accessible by letting users manage digital assets across major blockchains without switching between multiple wallets.

United States
About Phantom

Phantom is a self-custodial cryptocurrency wallet that helps users store, send, receive, and manage digital assets across multiple blockchain networks. The wallet features built-in token swaps, NFT management tools, staking capabilities, and advanced security features including scam detection and hardware wallet integration.

View jobs by Phantom

Skills

About the Role

Perform security assessments, vulnerability testing, threat modeling, reporting, secure coding collaboration, cryptographic integrity verification, incident response, and cross-team security projects.

Requirements

  • 7+ years of offensive security experience focused on blockchain technology and cryptography
  • Strong understanding of web and mobile application security risks and vulnerabilities
  • Proficiency in JavaScript and TypeScript code review
  • Experience writing proof of concepts to demonstrate vulnerabilities
  • Familiarity with manual testing, automated security tools, threat modeling, and threat intelligence
  • Strong analytical and problem-solving skills
  • Good verbal and written communication skills

Responsibilities

  • Perform regular security assessments on new projects, infrastructure, and code
  • Identify and mitigate vulnerabilities through manual testing and automated tools
  • Conduct threat modeling and incorporate threat intelligence
  • Write detailed reports and present findings to technical teams and management
  • Implement secure coding practices and ensure cryptographic integrity
  • Participate in incident response and incident management
  • Lead large cross-team security projects
  • Develop and validate proof of concepts demonstrating vulnerabilities

Benefits

  • Equity
  • Comprehensive medical, dental, and vision insurance fully covered
  • Remote setup stipend
  • Flexible hours
  • Supportive remote environment
  • Unlimited vacation
  • 401(k) retirement plan
  • Monthly wellness benefit
  • Weekly meal benefit
  • Global off-sites
Senior Security Engineer at Phantom | JobStash