[Remote] Software Engineer, Frontend / Full Stack (Identity Platform)

Note: The job is a remote job and is open to candidates in USA. Phantom is a modern money app used by tens of millions globally, aiming to simplify and enhance consumer finance through crypto-powered tools. The role focuses on the Identity Platform, responsible for critical authentication processes and ensuring secure, reliable user experiences.ResponsibilitiesOwn and evolve the signing path for every transaction in PhantomBuild and harden authentication, unlocking, biometrics, and account access flows across web and mobileShip passkeys (WebAuthn) and MFA improvements with a strong security/usability balanceOwn onboarding and key lifecycle flows: key generation/derivation, seed phrase flows, seedless registration, hardware wallet pairingOwn sensitive key export/import experiences and related safety railsWrite and maintain high-signal, non-flaky tests (unit/integration/e2e) for critical paths; ensure safe rollouts via monitoring and staged releasesSkills7+ years of experienceStrong TypeScript skills; comfortable shipping code across browser, Node.js, and mobile JS runtimesProven ability to build high-signal, low-flake test suites for critical systemsFamiliarity with auth concepts and common mechanisms (sessions/tokens, MFA/OTP, WebAuthn/passkeys)Strong engineering fundamentals: system design, debugging, and production reliabilityDeeper experience with OAuth2/OIDC, WebAuthn internals, cryptography, or key management systemsWeb3/wallet or signing-flow experienceSecurity- or money-adjacent experience (identity, payments, custody)Rust experience (or strong interest in learning it)BenefitsCompetitive salary and equityComprehensive insurance (medical/dental/vision) — 100% coveredStipend for your ideal remote set-upFlexible hours and a supportive remote environmentUnlimited vacation: Take time when you need it (and we really mean it!)401(k) retirement planMonthly wellness benefitWeekly meal benefitGlobal off-sitesCompany OverviewPhantom is a crypto wallet that facilitates the buying, trading, and storing of cryptocurrencies, including NFTs and tokens. It was founded in 2021, and is headquartered in San Francisco, California, USA, with a workforce of 51-200 employees. Its website is https://phantom.com.Company H1B SponsorshipPhantom has a track record of offering H1B sponsorships, with 2 in 2026, 4 in 2025, 3 in 2024, 4 in 2023, 3 in 2022. Please note that this does not guarantee sponsorship for this specific role.