Sr. Software Engineer – API & Auth Platform

📋 Description Work with a team of senior/staff engineers building the API, authentication, and internal tooling Help deliver the GraphQL API frameworks powering our customer-facing and internal apps, including Contribute to Betterment's authentication and authorization systems, keeping them current with Build platform capabilities like secure, first-party MCP access to Betterment APIs — and the Embed with the product teams who build on your platform every day. Develop broad Betterment domain Help make the standards that keep shared systems healthy visible and easy to meet, and help teams 🎯 Requirements A contributor capable of working in sensitive auth systems, working alongside senior and staff IC Experience building on or contributing to a shared API platform — ideally GraphQL — with an Experience with modern authentication/authorization patterns (OAuth 2.0, OIDC, passkeys), with an Experience operating systems in production that other engineering teams depend on, with an eye for Comfort with the evolving AI landscape — using AI tooling in your own workflow and thinking clearly Fullstack development experience including GraphQL and one or more server-side languages (Ruby 🎁 Benefits Medical, dental, and vision coverage Life and AD&D insurance Short- and long-term disability Infertility support and WPATH-aligned transgender health benefits Employee Assistance Program (EAP) Transit benefits and FSA and HSA options