Senior/Staff Backend Engineer, Identity Platform

Remote

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Not SpecifiedCompensation

Senior (5 to 8 years), Expert & Leadership (9+ years)Experience Level

Full TimeJob Type

UnknownVisa

Cryptocurrency, Fintech, Blockchain, Digital WalletsIndustries

Requirements

Candidates should have 7+ years of backend experience, demonstrating success in building large-scale, high-availability systems using Node.js, TypeScript, Rust, or similar frameworks. Deep expertise in authentication protocols like OAuth2/OIDC, WebAuthn/Passkeys, and OTP is required, along with a strong background in key management services (e.g., AWS KMS, Vault) and cryptography. Familiarity with Web3/Crypto, strong system design and architecture skills, and experience mentoring engineers are strongly preferred.

Responsibilities

The Senior/Staff Backend Engineer will own and evolve the core authentication infrastructure, leading the design, implementation, and operation of the Auth stack, multi-factor authentication methods, and key-management services. Responsibilities include hardening the Auth stack, shipping improvements to secure enclaves and token flows, designing and scaling Passkey support, delivering additional authentication factors, driving seedless KMS account provisioning, leading KMS migration with zero-downtime data transitions, defining and maintaining auth APIs, establishing SLAs and monitoring, participating in on-call rotations, and guiding other engineers through design reviews and best practices.

Skills

Backend Engineering

Identity Platform

Authentication

Auth Stack

Passkey

WebAuthn

Multi-factor Authentication (MFA)

Key Management Services (KMS)

API Design

Threat Modeling

Secure Enclaves

Token Flows

Data Migration

Zero-downtime deployments

Phantom

Multi-chain crypto wallet for digital assets

About Phantom

Phantom.app offers a multi-chain cryptocurrency wallet that allows users to manage various digital assets across different blockchain networks without needing multiple wallets. The wallet is designed for both experienced investors and beginners, featuring a user-friendly interface that simplifies the complexities of cryptocurrency management. Users can store, stake, and earn rewards on their tokens, and benefit from a fast, low-cost token swapping feature for trading digital assets. A key aspect of Phantom.app is its integration with major NFT marketplaces, enabling users to showcase, monitor, and sell their NFT collections easily. Security is emphasized through a self-custodial model, giving users full control over their funds, along with scam detection features and the option to connect a Ledger device for added protection. Phantom.app aims to provide a seamless and secure platform for cryptocurrency management, catering to the needs of a diverse clientele.

San Francisco, CaliforniaHeadquarters

2021Year Founded

$115.3MTotal Funding

SERIES_BCompany Stage

Crypto & Web3Industries

201-500Employees

Benefits

Competitive salary and equity.

Comprehensive insurance (medical/dental/vision) — 100% covered.

Stipend for your ideal remote / WFH set-up: laptop, headphones, and any other work gear you may need.

Flexible hours and a long-standing, supportive remote environment.

Monthly co-working space and mobile phone expense.

Unlimited vacation: Take time when you need it (and we really mean it).

Risks

Increased competition from Best Wallet with a superior user interface.

Rapid user growth may strain infrastructure and customer support.

Decision not to launch a token could lead to user dissatisfaction.

Differentiation

Phantom offers a multi-chain wallet supporting Solana, Ethereum, Polygon, and Bitcoin.

The wallet integrates with major NFT marketplaces for easy NFT management and transactions.

Phantom prioritizes security with self-custodial features and scam detection capabilities.

Upsides

Phantom's user base tripled to 3.2 million MAUs by January 2024.

Partnership with Transak enhances seamless digital asset purchases for users.

Integration with dYdX facilitates significant trading volume, boosting platform activity.

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