Senior Software Engineer - Wallet/Authentication Platform

Key Responsibilities

Digital Wallet Client Development

• Build and maintain the client-side wallet experience — credential storage, management, and presentation flows across iOS, Android, and web
• Deliver seamless, secure UX for issuing, holding, and presenting Verifiable Credentials and other identity artifacts

Verifiable Credentials & Standards Implementation

• Implement and evolve support for W3C Verifiable Credentials (VC Data Model), Decentralized Identifiers (DIDs), and related protocols (SD-JWT VC, mdoc/ISO 18013-5)
• Engage with emerging standards to inform ID.me's credential architecture

Secure Hardware & Cryptographic Storage

• Leverage platform secure storage APIs — iOS Keychain, Android Keystore / StrongBox to bind credentials and keys to device hardware
• Design credential lifecycles with strong cryptographic guarantees for issuance, binding, revocation, and presentation

Authentication Integration

• Integrate wallet credential flows with the broader authentication stack, passkeys/FIDO2, OIDC credential presentations, and protocol-level bridges between identity wallet and relying party verification
• Ensure the client-side auth surface is hardened against phishing, replay, and interception attacks

Code Quality & Engineering Craft

• Write high-quality, maintainable code with strong test coverage, following team best practices around code reviews, CI/CD, and documentation
• Contribute to codebase health by identifying and addressing technical debt and improving shared components

Cross-Functional Collaboration

• Partner with Product, Design, Security, Identity Standards, and adjacent engineering teams to ship cohesive credential experiences
• Participate actively in planning, retrospectives, and cross-team discussions

Mentorship & Leadership

• Provide technical guidance to junior engineers through code reviews, design discussions, and pairing
• Help establish and reinforce team standards for secure client development

Required Qualifications

• Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent practical experience)
• 5+ years of professional software development experience, with significant focus on mobile or client-side engineering
• 1+ years experience with AI-assisted development tooling (e.g., Claude Code, Cursor) demonstrated by at least one year of daily use
• 1+ years experience developing production mobile applications for iOS (Swift/Objective-C) or Android (Kotlin/Java), or cross-platform (React Native, Flutter) with native module integration

Preferred Qualifications

• Experience implementing W3C Verifiable Credentials (VC Data Model 1.x/2.x), Decentralized Identifiers (DIDs), or related decentralized identity standards (SD-JWT VC, mdoc/ISO 18013-5 mDL)
• Demonstrated ability to independently own and ship complex features end-to-end with minimal oversight
• Hands-on experience with platform secure hardware APIs: iOS Secure Enclave, iOS Keychain, Android Keystore, Android StrongBox, or equivalent Trusted Execution Environment (TEE) primitives
• Familiarity with cryptographic key management in mobile contexts — key generation, attestation, binding, rotation, and secure deletion
• Experience building digital wallet applications — credential issuance flows, presentation protocols, and holder-binding mechanisms
• Familiarity with passkeys/FIDO2/WebAuthn, especially platform authenticator integration on iOS and Android
• Experience with authentication and identity protocols: OAuth 2.0, OpenID Connect (OIDC), OIDC for Verifiable Presentations (OID4VP), or SIOP v2
• Familiarity with NIST SP 800-63 identity assurance levels and what they mean for credential binding and presentation security
• Experience with React or modern web frameworks for building wallet-style web client experiences
• Familiarity with CI/CD pipelines, automated testing frameworks, and mobile-specific testing tooling
• Exposure to low-level mobile development and mobile networking security — including SIM/eSIM architecture, SIM Network Authentication (SNA), carrier-level authentication primitives, SS7/Diameter security considerations, and the security properties and attack surface of cellular identity
• Startup or high-growth company experience with a strong bias toward execution and ownership