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Senior/Staff Engineer, Backend (Identity Platform)

· Job Posted February 21, 2026
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Job Description

You will own and evolve the core authentication infrastructure that secures every Phantom account. Reporting to the Engineering Manager, you’ll lead the design, implementation, and operation of our hardened Auth stack, multi-factor authentication methods, and next-gen key-management services. Your work will directly reduce account-takeover risk and empower every product team with rock-solid identity foundations.

Job Responsibility

  • Authentication systems: Architect and ship production-grade improvements to Phantom’s Auth stack (e.g. secure enclaves, hardened token flows, threat modeling)
  • Passkey (WebAuthn) & MFA
  • Secrets management: Design and build systems using modern secrets management technologies to push security and functionality to the next level
  • APIs & Integration: Define and maintain stable, versioned auth APIs for downstream teams
  • Partner with cross-functional stakeholders to ensure seamless rollouts

Requirements

  • 7+ Years of Backend Experience: Demonstrated success in building large-scale, high-availability systems in Node.js, TypeScript, Rust, NestJS (or similar frameworks)
  • Deep expertise in authentication protocols (OAuth2/OIDC, WebAuthn/Passkeys, OTP)
  • Strong background in key management services (e.g. AWS KMS, Vault) and cryptography
  • Web3/Crypto Knowledge: Familiarity with on-chain data, wallet integrations, or decentralized application patterns is strongly preferred
  • Strong System Design & Architecture Skills: Ability to translate product requirements into scalable, maintainable solutions, with a keen eye for performance trade-offs and fault tolerance
  • Leadership & Communication: Experience mentoring engineers, leading technical initiatives, and collaborating effectively with cross-functional teams

What we offer

  • Competitive salary and equity
  • Comprehensive insurance (medical/dental/vision) — 100% covered
  • Stipend for your ideal remote set-up
  • Flexible hours and a supportive remote environment
  • Unlimited vacation: Take time when you need it (and we really mean it!)
  • 401(k) retirement plan
  • Monthly wellness benefit
  • Weekly meal benefit
  • Global off-sites

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