Betterment
Sr. Software Engineer – API & Auth Platform
$170K–$195K
Betterment HQ - New York City +1 · Senior · Full-time · Posted Sep 23, 2026
- Location
- Betterment HQ - New York City
61 West 23rd Street, Fifth Floor, New York, New York
About the job
Build and operate shared API, authentication, authorization, and internal tooling platforms, including secure support for AI agents in a regulated financial services environment.
What you'll do
- Develop GraphQL API frameworks and platform capabilities used by customer-facing and internal applications.
- Contribute to authentication and authorization systems, observability, reliability, security, and safe production operations.
- Collaborate with product and partner teams, guide platform standards, and mentor junior engineers.
What they ask for
- Experience with shared API platforms and modern authentication/authorization patterns.
- Experience operating production systems relied on by other engineering teams, including observability, testing, and safe rollout.
- Full-stack development experience including GraphQL and one or more server-side languages.
- Experience collaborating across disciplines and teams.
Nice to have
- Experience with GraphQL API platforms is described as ideal.
- Experience with OAuth 2.0, OIDC, or passkeys is listed as relevant.
Pay
$170,000 - $195,000 USD base salary
Tools
GraphQL, OAuth 2.0, OIDC, passkeys, Ruby, Java, TypeScript, C#
AI focus
Use AI tooling in engineering workflows and design safe API access for AI agents; build support for agentic tooling and AI-native API development workflows.
Model-written summary · the original posting is authoritative