Senior Software Engineer (API & Auth Platform)

• 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
• You will help build core pieces of the GraphQL API frameworks powering our customer-facing web and mobile applications, working closely with engineering leadership. You will also collaborate with operations, customer support, and compliance partners to ensure our internal APIs let teams operate Betterment systems with the rigor our customers and regulators expect
• As AI tooling reshapes how we build and operate our systems, you will have significant influence over how Betterment’s APIs support AI agents and tooling safely in a regulated financial services environment
• Work with a team of senior/staff engineers building the API, authentication, and internal tooling foundation that every Betterment team relies on
• Help deliver the GraphQL API frameworks powering our customer-facing and internal apps, including agentic tooling for AI-native API development workflows
• Contribute to Betterment’s authentication and authorization systems, keeping them current with industry best practices
• Build platform capabilities like secure, first-party MCP access to Betterment APIs — and the reliability, security, and developer experience work that makes them trustworthy
• Embed with the product teams who build on your platform every day. Develop broad Betterment domain expertise in the process
• Help make the standards that keep shared systems healthy visible and easy to meet, and help teams understand the “why” behind them
• Participate in efficient, blameless incident response across your team and the teams building on the API platform. Invest in observability that serves both developers and internal tool users
• Mentor junior engineers, sharing your experience to expand their impact and accelerate their growth

Benefits

• Compensation & Ownership: Competitive, benchmarked salary. Equity for everyone, including new hire, performance, and refresher grants.
• Retirement: 401(k) match from day one, including Student loan matching. Zero management fees.
• Health & Wellbeing: Comprehensive medical, dental, and vision coverage. One Medical membership. Fertility and LGBTQIA+ transition support.
• Time Away: Flexible time off. Paid parental leave for all parents. Four-week sabbatical in year six.
• In-Office Culture & Flexibility: An in-person, collaborative culture, with no required office days during the summer and winter holidays.
• Growth & Development: Free Coaching for everyone and continuous development.
• Community & Care: Chef lunches, guest speakers, company gatherings, heritage celebrations, and seven Employee Resource Groups.
• Employee Support: Dedicated benefits advocate and EAP access.- 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 building on or contributing to a shared API platform — ideally GraphQL — with an appreciation for the frameworks, conventions, and developer tooling that let product teams introduce new capabilities, support existing usage, and gracefully retire legacy functionality
• Experience collaborating across discipline and team boundaries
• Experience operating systems in production that other engineering teams depend on, with an eye for observability, testing, and safe rollout
• Fullstack development experience including GraphQL and one or more server-side languages (Ruby, Java, TypeScript, C#, Python, etc.)
• Comfort with the evolving AI landscape — using AI tooling in your own workflow and thinking clearly about how AI agents should access APIs safely
• An open-minded approach when navigating the tension between moving fast, customer quality, and regulatory requirements- We’ll take a few weeks to review all applications. If we’d like to spend more time with you, we’ll reach out to arrange next steps, which will include 3-4 sets of meetings with your future colleagues
• In the interview process, we’ll look to learn more about your skills, experiences, capabilities, and motivators. Many of our questions will be aimed at understanding how you might operate here at Betterment. Depending on the role, we may ask you to complete a case study exercise or technical assessments, as we want to collect a robust set of data points to better inform our decisions
• On average, it takes us around 3-5 weeks to make a hiring decision, depending on your availability and sense of urgency. As a best practice, we aim to interview at least 2-3 final round candidates before making a hiring decision. Please note that, as we usually receive an overwhelming number of applications for open positions, we’re unable to offer individual feedback during the interview process
• We recognize that interviewing for a new role is a big deal. We appreciate you considering Betterment as the next step in your career, and our Recruiting Team is here to support and advocate for you through the interview process!
• Betterment is dedicated to providing accommodations to candidates upon request. If you need accommodations at any point throughout the interview process, please reach out to your recruiter