Senior Software Engineer, Full-Stack

What you’ll do

• Build and scale Vannevar’s centralized authentication and authorization platform, including tenant isolation across customer environments—from development through classified deployments.
• Own the internal self-service platform for user, group, and permission management; partner with Design to deliver intuitive administrative experiences for developers and mission teams.
• Build tooling and visualizations that help developers, administrators, and mission users understand and validate access permissions.
• Own and evolve Vannevar’s platform management interfaces, including the feature flag system, to support new products and customer needs.
• Partner with product engineering teams to build shared authorization and resource-sharing capabilities across the platform.
• Shape the long-term roadmap for the Security Platform team by driving scalable platform capabilities and improving the developer experience.

What we’re looking for

• 7+ years of software engineering experience, with a strong track record of designing, building, and operating scalable backend systems, and delivering full-stack features from conception through production.
• Strong backend expertise, including proficiency in one or more modern backend languages (e.g., Python, Java), experience with relational databases (e.g., PostgreSQL), distributed systems, and API design.
• Comfortable owning end-to-end development, including frontend work (e.g., React/TypeScript/Node.js) when needed, with a focus on delivering polished, customer-facing experiences rather than specializing exclusively in backend infrastructure.
• Strong product intuition, with the ability to make pragmatic technical decisions, balance user needs with engineering tradeoffs, and thrive in ambiguous, fast-moving environments.
• Experience with identity and authentication concepts and platforms, including OAuth 2.0, OpenID Connect (OIDC), SAML, JWTs, session management, RBAC/ABAC, SSO, Keycloak, OpenFGA, or other authentication and authorization systems.
• Excellent cross-functional collaboration and communication skills, with experience partnering closely with product, design, security, and infrastructure teams, driving technical direction, and aligning stakeholders through ambiguity.

Nice to have

• Active Security clearance or ability to obtain one and desire to travel to visit users, collect feedback, and debug issues
• Prior experience working in a user-facing product role

What we offer

The salary range for this position is $150,000 - $215,000 + equity. Within the range, individual pay is determined by experience, relevant education, and/or training.

We’re proud to offer competitive benefits that support our employees. Some key highlights of our benefits package include:

• Health, dental, and vision insurance
• Remote friendly with WeWork access
• Unlimited PTO, shared downtime during the federal holiday calendar, and company-wide off time at the end of each year
• 401(k) match
• Lifestyle & wellbeing stipends
• Salary top-up during military reserve duty
• Fully paid parental leave
• Child and pet care reimbursement during travel