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