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Phantom
Senior Staff Backend Engineer Identity Platm
atĀ Phantom
about 4 hours ago | 9 views | Be the first one to apply

Senior Staff Backend Engineer Identity Platm

Full-time
Remote
Per year
$100,000 To $112,000

About the company

Phantom makes it safe & easy for you to store, buy, send, receive, swap tokens and collect NFTs on the Solana blockchain.

Job Summary

Responsibilities

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

Qualifications

šŸ“7+ Years of Backend Experience: Demonstrated success in building large-scale, high-availability systems in Node.js, TypeScript, Rust, NestJS (or similar frameworks). šŸ“Deep expertise in authentication protocols (OAuth2/OIDC, WebAuthn/Passkeys, OTP), Strong background in key management services (e.g. AWS KMS, Vault) and cryptography šŸ“Web3/Crypto Knowledge: Familiarity with on-chain data, wallet integrations, or decentralized application patterns is strongly preferred. šŸ“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. šŸ“Leadership & Communication: Experience mentoring engineers, leading technical initiatives, and collaborating effectively with cross-functional teams.

The future of finance is here — whether you’re interested in blockchain, cryptocurrency, or remote web3 jobs, there’s a perfect role waiting for you.

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