Senior Fullstack Software Engineer, Onebrief

• You're a generalist at heart
• Someone who gets restless when siloed and thrives when moving across the stack and across problem domains
• You think in systems, communicate trade-offs clearly, and use AI tooling as a natural part of how you work, not as a novelty
• You bring your own judgment to ambiguous situations and don't need a fully defined problem to make progress
• You care about the craft of engineering and the mission it serves
• 6+ years of experience in software engineering
• Equivalent practical experience valued equally to a formal degree
• Fluency across the stack. Comfortable working in frontend, backend, and infrastructure as the problem demands
• Strong understanding of distributed systems, API design (REST, GraphQL, gRPC), and data modeling
• Hands-on experience with containerization and cloud infrastructure (Docker, Kubernetes, AWS/GCP/Azure)
• Comfort operating in a fluid squad model, able to context-switch, ramp fast on new domains, and contribute without needing long warm-up time
• Active use of AI coding tools (e.g., Claude Code, Cursor, Copilot) to accelerate development. We expect engineers to treat AI as a force multiplier, not an afterthought
• Strong communication skills and the ability to clearly articulate technical trade-offs
• Track record of ownership and delivering complex projects in a fast-paced environment

Desirable

• We're hiring a Senior Software Engineer to help design, build, and operate the systems that power our platform. We operate in a squad-based model: small, focused teams that form around problems. Engineers move fluidly across squads as priorities shift, so breadth of thinking and the ability to ramp quickly in new domains matter as much as deep specialization
• Our platform spans a modern full stack: a React/TypeScript frontend, Node.js backend services, cloud-native infrastructure, and authentication and identity systems. You'll work across these layers, tackling challenges in performance, reliability, scalability, security, and user experience. We value strong engineering judgment over mastery of any single technology
• Design, build, and maintain systems across the stack, from frontend interfaces and APIs to backend services, databases, and infrastructure
• Rotate across squads as priorities shift, bringing your expertise to wherever it creates the most leverage, and ramping quickly in unfamiliar domains
• Evolve and optimize core systems including data models, authentication flows, API layers, and client-side architecture
• Diagnose and resolve performance, scalability, reliability, and security issues in production
• Collaborate on architecture and long-term strategy across platform, infrastructure, and product dimensions
• Implement and refine monitoring, alerting, observability, and auditing across systems
• Use AI-assisted development tools to accelerate implementation, testing, and code quality — and help establish team norms for doing so effectively
• Balance long-term engineering quality with pragmatic, high-velocity delivery
• Core tech we use
• Frontend: React, TypeScript, Vite, shared component libraries, client-side observability
• Backend: Node.js, PostgreSQL, Redis, secure RESTful APIs, distributed services
• Authentication & Authorization: Keycloak, OpenID Connect (OIDC), SAML 2.0, OAuth 2.0, ABAC, JWT, federated identity provider integrations
• Infrastructure: Kubernetes, AWS, Terraform, CI/CD pipelines, container security and secrets management
• Integrations: CSV/Excel/KML importers, PDF exports, DoD and enterprise data systems, secure API gateways, auditing pipelines