Senior Software Engineer, Full-stack

Onebrief builds collaboration and AI-powered workflow software for military planning and operational coordination.

Today, many critical planning workflows still rely on fragmented systems, static documents, and disconnected tools that make collaboration and decision-making unnecessarily difficult. Onebrief brings modern software, AI, and real-time collaboration into those environments, helping teams operate with greater clarity, coordination, and adaptability in situations where decisions carry real-world consequences.

We are a distributed team of builders from military, operational, and technology backgrounds who care deeply about improving how important work gets done. Some team members work remotely, while others work directly alongside customers in operational environments around the world.

Founded in 2019, Onebrief is backed by leading investors including General Catalyst, Battery Ventures, Insight Partners, Sapphire Ventures, and Human Capital. Valued at more than $2 billion, we continue to invest in product innovation, AI capabilities, and team growth.

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.

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.

• 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.

• 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

Nice to Have Qualifications

• Experience with observability stacks (logging, metrics, tracing) and incident response

• Background in mission-critical or high-compliance domains (SOC2, FedRAMP, HIPAA, or DoD)

• Experience with event-driven architectures (Kafka, Pub/Sub, microservices)

• Prior experience driving architecture and system design decisions for complex, high-scale systems

• Some familiarity with authentication protocols (OIDC, OAuth 2.0, SAML) or access control patterns

• 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

Notice to Third Party Recruitment Agencies
Please note that Onebrief does not accept unsolicited resumes from recruiters or employment agencies. In the absence of an executed Recruitment Services Agreement, there will be no obligation to any referral compensation or recruiter fee. In the event a recruiter or agency submits a resume or candidate without an agreement Onebrief explicitly reserves the right to pursue and hire those candidate(s) without any financial obligation to the recruiter or agency. Any unsolicited resumes, including those submitted to hiring managers, shall be deemed the property of Onebrief.