[Remote] Senior Full Stack Engineer

Note: The job is a remote job and is open to candidates in USA. Cobalt AI uses automation to elevate physical safety and security in the workplace. They are hiring a Senior Full Stack Engineer to develop and maintain interfaces for security teams, including real-time monitoring tools and APIs.ResponsibilitiesBuild and refine real-time security dashboards, event triage interfaces, and fleet management tools used by security teams 24/7Design and implement complex, interactive UIs — canvas rendering (environment maps, robot positioning), data visualization, live robot video via WebRTC, and subscription-driven event streamingOwn component architecture in a monorepo and contribute to a Storybook-driven design systemBuild and extend the GraphQL API — queries, mutations, and WebSocket subscriptions — serving all frontend applicationsWork with Django models in PostgreSQL — multi-tenant data isolation, schema design, query optimization, and migrationsShip full-stack features end-to-end — from React components to GraphQL mutations to Django models and background jobsPartner with the CDS and ML teams on the detection-to-event pipelineWrite well-tested code with strong observability — tracing, structured logging, and metricsParticipate in code reviews, architectural discussions, incident response, and on-call rotationsSkills5+ years of professional software engineering experience, with depth in frontend developmentStrong proficiency in React and TypeScript — opinionated about component architecture, state management, and rendering performanceExperience building complex, interactive UIs — canvas/2D rendering, real-time streaming, data visualization, or WebRTCBackend fluency in Python and Django — building GraphQL APIs, writing migrations, and optimizing ORM queriesSolid understanding of PostgreSQL — data modeling, indexing, and query performanceComfort working in a monorepo with shared packages, generated types, and cross-team code ownershipExperience deploying to AWS and working with containerized applicationsBenefitsEquityFull benefits (medical, vision, dental)Flexible work arrangementsCompany OverviewCobalt AI provides AI-powered threat detection, automated monitoring, robotic security guards, and remote monitoring services. It was founded in 2016, and is headquartered in San Francisco, California, USA, with a workforce of 51-200 employees. Its website is https://www.cobaltai.com.Company H1B SponsorshipCobalt AI has a track record of offering H1B sponsorships, with 1 in 2025. Please note that this does not guarantee sponsorship for this specific role.