Job Description

Employment Type: Full-Time Location Type: Remote Salary: Not Specified

Position Overview

Phantom is revolutionizing the way millions of people interact with the crypto ecosystem. Our self-custodial wallet offers a seamless, unified experience for managing accounts and tokens across Solana, Bitcoin, Ethereum, and Polygon, empowering users with a single, convenient solution. By integrating cutting-edge security features and launching innovative tools for an enhanced personalized user experience, Phantom provides a next-generation, safe, and easy-to-use self-custodial wallet for everyone. This strategy has allowed Phantom to achieve significant milestones, including surpassing 16 million MAUs, reaching #1 in the Google Play Store finance category, and consistently trending as a Top 50 app across all categories, alongside X, PayPal, Coinbase, and ChatGPT.

Role Description

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.

Responsibilities

• Auth Stack Hardening:
  • Architect and ship production-grade improvements to Phantom’s Auth stack (e.g., secure enclaves, hardened token flows, threat modeling).
• Passkey (WebAuthn) & MFA:
  • Design, build, and scale Passkey support.
  • In Q4, deliver additional factors: authenticator-app integration and recovery-email/OTP flows.
• KMS Migration & Seedless Accounts:
  • Drive seedless KMS account provisioning for new users.
  • Lead the Juicebox→KMS migration with zero-downtime data transitions.
• API & Integration:
  • Define and maintain stable, versioned auth APIs for downstream teams (Frontend, Cash, Onboarding).
  • Partner with cross-functional stakeholders to ensure seamless, backward-compatible rollouts.
• Operational Excellence:
  • Establish SLAs, monitoring dashboards, and automated rollback/playbook scripts for all auth services.
  • Participate in on-call rotation, incident response, and write clear post-mortems.
• Mentorship & Collaboration:
  • Guide IC3+ engineers through design reviews, pair-programming, and technical best practices.
  • Evangelize secure-by-design principles across the organization.

Qualifications

• 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:
  • Authentication protocols (OAuth2/OIDC, WebAuthn/Passkeys, OTP).
  • 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.

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 16M+ 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, and 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 for self-custodial crypto wallets.

There has never been a better time to work in crypto to help shape the future of innovation.