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OnebriefOnebriefUnited States

Senior Software Engineer, Full-stack

Senior full-stack engineer building AI-powered collaboration and workflow software for military planning. Design, build, and optimize across React/TypeScript frontend, Node.js backend, databases, and Kubernetes/AWS infrastructure in a fluid squad model. Requires 6+ years experience, distributed systems knowledge, and active use of AI coding tools.

180k – 230k/yr
Remote6+ YOEFullstack Engineering

About the role

What You'll Do

  • 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.

What We Look For

  • 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.

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

Skills

ReactTypeScriptNode.jsPostgresRedisKubernetesAWSTerraformGraphQLgRPCDockerkeycloakoauth 2.0OIDC
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