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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