Software Engineer, Frontend / Full Stack (Identity Platform)

Responsibilities

• Own and evolve the signing path for every transaction in Phantom.
• Build and harden authentication, unlocking, biometrics, and account access flows across web and mobile.
• Ship passkeys (WebAuthn) and MFA improvements with a strong security/usability balance.
• Own onboarding and key lifecycle flows: key generation/derivation, seed phrase flows, seedless registration, hardware wallet pairing.
• Own sensitive key export/import experiences and related safety rails.
• Write and maintain high-signal, non-flaky tests (unit/integration/e2e) for critical paths; ensure safe rollouts via monitoring and staged releases.

Qualifications

Must-have

• 7+ years of experience
• Strong TypeScript skills; comfortable shipping code across browser, Node.js, and mobile JS runtimes.
• Proven ability to build high-signal, low-flake test suites for critical systems.
• Familiarity with auth concepts and common mechanisms (sessions/tokens, MFA/OTP, WebAuthn/passkeys)
• Strong engineering fundamentals: system design, debugging, and production reliability.

Nice-to-have

• Deeper experience with OAuth2/OIDC, WebAuthn internals, cryptography, or key management systems.
• Web3/wallet or signing-flow experience.
• Security- or money-adjacent experience (identity, payments, custody).
• Rust experience (or strong interest in learning it).