# Sr. Software Engineer – API & Auth Platform at Betterment

- Company: Betterment
- What the company does: Betterment can help grow your money by making saving and investing easy. Invest in a tailored portfolio, set buckets for your goals, and earn rewards. Backed by Bessemer and Menlo.
- Company website: https://www.betterment.com/
- Type: Startups
- Level: Senior
- Location: Betterment HQ - New York City
- Work setup: On-site
- Pay: $170K to $195K base salary per year (USD)
- Posted: 2026-09-23
- Apply by: 2026-11-07
- Apply: https://www.betterment.com/careers/current-openings/job?gh_jid=8212276&gh_jid=8212276
- Page: https://www.1752.vc/careers/jobs/betterment-sr-software-engineer-api-and-auth-platform/

## About the role

The API & Auth Platform team enables product teams across Betterment to build and operate APIs quickly, enjoyably, and securely. As Sr Software Engineer, you will work with a team of senior/staff engineers stewarding our shared GraphQL API frameworks, authentication and access control systems, and internal tooling platform.

## What they're looking for

- A contributor capable of working in sensitive auth systems, working alongside senior and staff IC colleagues to shaping their technical direction
- Experience with modern authentication/authorization patterns (OAuth 2.0, OIDC, passkeys), with an appreciation for the importance of adoption, long-term support, and security testing
- Experience operating systems in production that other engineering teams depend on, with an eye for observability, testing, and safe rollout
- Comfort with the evolving AI landscape — using AI tooling in your own workflow and thinking clearly about how AI agents should access APIs safely
- Fullstack development experience including GraphQL and one or more server-side languages (Ruby, Java, TypeScript, C#, Python, etc.)
- Experience collaborating across discipline and team boundaries

Tags: Platform Engineering