Senior API & Auth Platform Engineer (GraphQL)

Betterment; New York (NY); Hybrid; USD 170,000 - 195,000; Full time

Benefits offered by this job

Equity for employees

401(k) match

Sabbatical after 6 years

Professional coaching

Flexible PTO

Job summary

Betterment is seeking a Sr Software Engineer for the API & Auth Platform to help build our GraphQL API frameworks and authentication systems. You will collaborate with leadership and product teams to deliver secure, scalable APIs for customer-facing and internal applications, including AI tooling support.

You’ll work in a hybrid NYC-based role with a base salary range and opportunities for incentive bonuses, alongside a broad benefits package and professional growth through mentoring and

Qualifications

• Experience building on or contributing to a shared API platform, ideally GraphQL.
• Experience with modern authentication/authorization patterns (OAuth 2.0, OIDC, passkeys).
• Experience operating production systems with observability, testing, and safe rollout.

Responsibilities

• Build the GraphQL API frameworks powering customer-facing and internal apps.
• Contribute to authentication and authorization systems to keep them secure and compliant.
• Mentor junior engineers and collaborate across teams to improve platform health.
• Invest in observability and incident response to support developers and tool users.

Skills

GraphQL

Ruby

Java

TypeScript

C#

Python

Tools

GraphQL API frameworks

OAuth 2.0

OIDC

Passkeys

Job description

Betterment is seeking a Sr Software Engineer for the API & Auth Platform to help build our GraphQL API frameworks and authentication systems. You will collaborate with leadership and product teams to deliver secure, scalable APIs for customer-facing and internal applications, including AI tooling support.

You’ll work in a hybrid NYC-based role with a base salary range and opportunities for incentive bonuses, alongside a broad benefits package and professional growth through mentoring and