Software Engineer, Frontend / Full Stack (Identity Platform)

Phantom·AnywhereRemotesenior

In short

→Desarrollas la plataforma de identidad crítica de un wallet líder en Solana, con enfoque en seguridad y experiencia de usuario.
→Tu día a día incluye construir flujos de autenticación, firma de transacciones y gestión de claves en múltiples entornos (web, móvil, Node.js).
→Destacan los flujos de passkeys (WebAuthn) y la seguridad en la gestión de claves, con impacto directo en la protección de fondos y acceso de usuarios.

Strong engineering fundamentals: system design, debugging, and production reliability.

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What they ask for

✓7+ años de experiencia en ingeniería de software
✓Habilidades sólidas en TypeScript para múltiples entornos (navegador, Node.js, móvil)
✓Experiencia comprobada en pruebas de alta señal y baja fragilidad en sistemas críticos
✓Conocimiento de conceptos de autenticación (MFA, WebAuthn, tokens, sesiones)
✓Fundamentos sólidos en diseño de sistemas, depuración y confiabilidad en producción
✓Capacidad para gestionar flujos de onboarding, generación de claves y exportación/importación segura de claves

Don't tick every box? That's normal — your free dossier shows your gaps and how to cover them in the interview.

TypeScriptJavaScriptNode.jsWebAuthnPasskeysHermesOAuth2OIDCCryptographyRust

Who should you write to at Phantom?

Your free dossier identifies the people who'd interview you — their background, what they value, and how to reach out so you stand out before applying.

Phantom is on a mission to connect the world to the freedom of open markets. Tens of millions of people all over the world use Phantom to access global markets that never close, including perpetuals, prediction markets, tokenized assets, stablecoins and memes. Phantom users are able to discover the markets that matter and the cultural moments that shape them, building conviction through real-time data and the verified performance of top traders. With self-custody and access to open networks at its core, Phantom lets them control their financial moves in the same app they use to safely store or spend money worldwide. Phantom has reached #1 in Google Play's finance category and consistently ranks in the top 50 apps across all categories. Phantom partners with many of the most trusted and influential names in finance like Hyperliquid, Stripe, Kalshi and Visa, to make the most popular and innovative financial products accessible to everyone. We are around 180 people, fully remote, backed by a $150M Series C investment from a16z, Sequoia Capital and Paradigm. Role Description Identity Platform is the trust root of Phantom: we own authentication, unlocking, onboarding/key generation, and the signing pipeline that every transaction flows through. This is a business-critical area where bugs can lock users out or put funds at risk. , Hermes) to keep these foundations fast, secure, and reliable. 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. 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). Why Work with Us We are a team of experienced builders in the blockchain and crypto industry. Our journey began from users seeking an easy, seamless path to accessing the crypto ecosystem. This passion fueled our exponential growth, allowing us to onboard over 20M+ active users in just over three years; with our user base growing weekly. Our dedication to a secure and seamless user experience has made us the leading wallet on Solana as well as our multi-chain approach enhances our platform's versatility, meeting the needs of a diverse and growing user base. By staying at the forefront of technology and user expectations, we continue to innovate and set industry standards on self-custodial crypto wallets. There has never been a better time to work in crypto to help shape the future of innovation with a focus around the wallet experience! First impressions matter: Wallets are responsible for a users first impression with crypto and onboarding new users into crypto. By ensuring that a user has a great first-time experience with crypto, we can help supercharge the growth of the entire ecosystem.

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