Senior/Staff Backend Engineer, Identity Platform jobs in United States
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Phantom · 18 hours ago

Senior/Staff Backend Engineer, Identity Platform

positionUnited States
timeFull-time
remoteRemote
senioritySenior Level, Lead/Staff
date7+ years exp

Phantom is revolutionizing the way millions of people interact with the crypto ecosystem. In this role, you will own and evolve the core authentication infrastructure that secures every Phantom account, leading the design and implementation of security features and identity foundations for the product teams.

BitcoinCryptocurrencyDecentralized Finance (DeFi)FinanceFinancial ServicesFinTechNon-Fungible Token (NFT)
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Growth Opportunities
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H1B Sponsor Likelynote

Responsibilities

Authentication systems
Architect and ship production-grade improvements to Phantom’s Auth stack (e.g. secure enclaves, hardened token flows, threat modeling)
Passkey (WebAuthn) & MFA
Secrets management
Design and build systems using modern secrets management technologies to push security and functionality to the next level
APIs & Integration
Define and maintain stable, versioned auth APIs for downstream teams
Partner with cross-functional stakeholders to ensure seamless rollouts

Qualification

Node.jsTypeScriptAuthentication protocolsKey management servicesSystem DesignWeb3/Crypto KnowledgeLeadershipCommunication

Required

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 in authentication protocols (OAuth2/OIDC, WebAuthn/Passkeys, OTP), Strong background in key management services (e.g. AWS KMS, Vault) and cryptography
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

Preferred

Web3/Crypto Knowledge: Familiarity with on-chain data, wallet integrations, or decentralized application patterns is strongly preferred

Benefits

Comprehensive insurance (medical/dental/vision) — 100% covered
Stipend for your ideal remote set-up
Flexible hours and a supportive remote environment
Unlimited vacation: Take time when you need it (and we really mean it!)
401(k) retirement plan
Monthly wellness benefit
Weekly meal benefit
Global off-sites

Company

Phantom

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Phantom is a crypto wallet that facilitates the buying, trading, and storing of cryptocurrencies, including NFTs and tokens.
dateFounded in 2021
location
San Francisco, California, USA
people-size51-200 employees
web-link
https://phantom.com

H1B Sponsorship

Phantom has a track record of offering H1B sponsorships. Please note that this does not guarantee sponsorship for this specific role. Below presents additional info for your reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (4)
2024 (3)
2023 (4)
2022 (3)

Funding

Current Stage
Growth Stage
Total Funding
$268M
Key Investors
ParadigmAndreessen Horowitz
2025-01-16Series C· $150M
2022-01-31Series B· $109M
2021-07-14Series A· $9M

Leadership Team

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Chris Kalani
CPO & Co-Founder
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Francesco Agosti
CTO & Co-founder
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Recent News

Decrypt
Morning Minute: The SEC & OCC Usher In Crypto Era
2025-12-15
Decrypt
Phantom Crypto Wallet Adds Kalshi Prediction Markets for Over 20 Million Users
2025-12-13
Business Wire
Phantom and Kalshi Bring Prediction Markets to the World’s Leading Crypto Wallet
2025-12-12
Company data provided by crunchbase