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. Check out our Forbes Fintech 50 and CNBC and Statista's World's Top Fintech Companies 2026!
We are around 180 people, fully remote, backed by a $150M Series C investment from a16z, Sequoia Capital and Paradigm.
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. You'll ship TypeScript across browser, Node.js, and mobile runtimes (e.g., 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.
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).
Why Work With Us
Phantom's journey to becoming a global trading app began with making crypto easier to use. Today, we’re building on that foundation to help people discover the markets that matter, make informed financial moves, and safely store or spend their money worldwide. Joining Phantom means helping shape that next chapter: building products that bring the freedom of open markets to more people.
Build for global impact: Create products used by tens of millions of people, making innovative financial markets more accessible to users around the world.
Make complexity feel simple: Solve meaningful challenges across design, engineering, and user experience to make discovering markets and managing money seamless.
Put users in control: Help build a future where people have greater freedom over their assets and financial decisions, with security and self-custody at the foundation.
Benefits (only available to full-time employees)
Competitive salary and equity
Comprehensive insurance (medical/dental/vision): base plan 100% covered
Flexible hours and a long-standing, supportive remote environment
Unlimited vacation: Take time when you need it (and we really mean it!)
401(k) retirement plan
Wellness stipend
Weekly meal stipend
Learning & Development stipend
Remote / WFH set-up stipend
We strongly encourage candidates of all backgrounds to apply. We believe that our work is stronger with a variety of perspectives, and we’re eager to further diversify our company. If you have a background that you feel would make an impact at Phantom, please consider applying. We’re committed to building an inclusive, supportive place for you to do the best work of your career.
By submitting your resume and application materials, you acknowledge and agree that Phantom Technologies, Inc. ("Phantom") collects and processes your personal information (including application materials, interview records, and related data) to evaluate your candidacy. Phantom may use AI-powered tools and third-party service providers for transcription, note-taking, scheduling, and other administrative tasks. Phantom does not sell your information and your materials will be handled securely and in accordance with applicable data protection laws.