Senior Software Engineer – Full-Stack

Cobalt AI

Senior Full Stack Engineer developing real-time security tools for Cobalt AI's hybrid AI platform. Building key interfaces and APIs for security teams using React and Django.

Posted 4/29/2026full-timeSan Francisco • California • 🇺🇸 United StatesSenior💰 $160,000 - $210,000 per yearWebsite

Tech Stack

Tools & technologies

AWSDjangoGraphQLPostgresPythonReactTypeScript

About the role

Key responsibilities & impact

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

Requirements

What you’ll need

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.

Benefits

Comp & perks

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

ATS Keywords

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Hard Skills & Tools

ReactTypeScriptGraphQLDjangoPostgreSQLWebRTCcanvas renderingdata visualizationreal-time streamingPython

Soft Skills

code reviewsarchitectural discussionsincident responseon-call rotations