Senior Software Engineer (Wallet, Authentication)

Join <ID.me>, a leading identity verification platform, as a Senior Software Engineer (SDE-IV) on the Wallet - Authentication team. In this role, you will be responsible for building and improving the core sign-in, registration, and account management experiences for over 140 million members. You will own significant pieces of the authentication stack, drive medium-to-large features from definition to production, and ensure the security and reliability of the systems you manage. Additionally, you will collaborate with cross-functional teams and mentor other engineers.

• Own and ship authentication features, driving medium-to-large features end-to-end from definition through deployment and post-launch evaluation.
• Take accountability for the production health of authentication systems, participating in the on-call rotation, leading incident response and post-mortems.
• Act as a connector between your team and others, partnering with Product, Design, Security, Identity, and adjacent engineering teams to deliver cohesive auth experiences.
• Proficiency in a modern server-side web framework (e.g., Ruby on Rails, Django, Laravel), with hands-on experience building and operating production web applications at scale, including ownership of their reliability and on-call support
• Proficiency with AI-assisted development tooling (e.g., Claude Code, Cursor) demonstrated by at least one year of daily use, in addition to a commitment to an AI-first engineering culture that leverages these tools to maximize code quality, test coverage, and engineering velocity
• 6+ years of professional software development experience with a strong emphasis on full-stack web engineering
• Bachelor's degree in Computer Science, Engineering, or a related field (or equivalent practical experience)
• Strong communication and collaboration skills, with a track record of working effectively across Product, Design, and Engineering — and of mentoring engineers and raising the technical bar of a team
• Demonstrated ability to take loosely defined problems and independently drive medium-to-large features from definition to production with minimal oversight, making sound technical tradeoffs along the way
• Experience building or contributing to fraud detection, real-time risk engines, or abuse mitigation systems
• Experience with authentication and identity standards such as OAuth2, OpenID Connect, SAML, or FIDO2/WebAuthn
• Familiarity with security best practices for credential handling — password storage, session management, token issuance, and rate limiting
• Experience with React or other modern frontend frameworks for building user experiences
• Comfort working in a fast-moving product environment with iterative releases and A/B testing
• Familiarity with CI/CD pipelines, automated testing frameworks, and performance profiling tools
• Startup or high-growth company experience with a strong bias toward execution and ownership