Senior Software Engineer (Full-Stack)

Cobalt AI, LLC • San Francisco, CA

1d • Hybrid

About The Position

Cobalt AI uses automation to elevate physical safety and security in the workplace. Our platform, Cobalt Monitoring Intelligence, is a hybrid AI system, cloud-hosted with edge-deployed hardware, that provides human-verified, real-time monitoring of surveillance cameras, alarms, and robots across enterprise locations. We’re hiring a Senior Full Stack Engineer to own the interfaces that security teams rely on every day, including live robot video feeds, event triage workflows, real-time alarm dashboards, and fleet management tools built in React and TypeScript. You’ll also work across the backend (Django/Python, GraphQL) to build the APIs that power those experiences.

Requirements

• 5+ years of professional software engineering experience, with depth in frontend development
• Strong proficiency in React and TypeScript — opinionated about component architecture, state management, and rendering performance
• Experience building complex, interactive UIs — canvas/2D rendering, real-time streaming, data visualization, or WebRTC
• Backend fluency in Python and Django — building GraphQL APIs, writing migrations, and optimizing ORM queries
• Solid understanding of PostgreSQL — data modeling, indexing, and query performance
• Comfort working in a monorepo with shared packages, generated types, and cross-team code ownership
• Experience deploying to AWS and working with containerized applications

Responsibilities

• Build and refine real-time security dashboards, event triage interfaces, and fleet management tools used by security teams 24/7
• Design and implement complex, interactive UIs — canvas rendering (environment maps, robot positioning), data visualization, live robot video via WebRTC, and subscription-driven event streaming
• Own component architecture in a monorepo and contribute to a Storybook-driven design system
• Build and extend the GraphQL API — queries, mutations, and WebSocket subscriptions — serving all frontend applications
• Work with Django models in PostgreSQL — multi-tenant data isolation, schema design, query optimization, and migrations
• Ship full-stack features end-to-end — from React components to GraphQL mutations to Django models and background jobs
• Partner with the CDS and ML teams on the detection-to-event pipeline
• Write well-tested code with strong observability — tracing, structured logging, and metrics
• Participate in code reviews, architectural discussions, incident response, and on-call rotations

Benefits

• Competitive salary
• equity
• full benefits (medical, vision, dental)
• Flexible work arrangements

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed
• Number of Employees: 11-50 employees