Principal Fullstack Engineer

Principal Fullstack EngineerLocation: New York City (Hybrid)Pay: $175k - $190k Base + bonus & equity OverviewThis is a senior‑most individual contributor role within a fast‑growing engineering organisation operating at massive scale in the consumer technology and security space. The company serves tens of millions of users annually and processes hundreds of thousands of real‑time events per second across its platforms.The role sits within a newly expanded NYC engineering hub following a recent acquisition and plays a critical part in advancing the company's AI‑driven product roadmap. You'll work in a highly empowered, low‑bureaucracy environment that combines the resources of a large enterprise with the pace and ownership of a startup.ResponsibilitiesPartner closely with engineering leads and stakeholders to define what to build and how to build itLead frontend architecture decisions for complex, high‑traffic applicationsDrive migration away from legacy systems toward modern, scalable frameworksBuild and evolve server‑rendered applications using TypeScript‑based frameworksIntegrate and operationalise generative AI capabilities to create more customised software experiencesLaunch and oversee AI agents used for code generation and review, ensuring quality and reliabilityContribute to system design, specifications, and long‑term technical directionCollaborate across full‑stack teams in a product‑focused, customer‑driven environmentMust‑Have Qualifications8+ years of professional software engineering experienceStrong TypeScript expertise with modern frontend and server‑side rendering frameworksFull‑stack engineering background with strong frontend ownershipExperience working with Kubernetes in production environmentsBachelor's degree in Computer Science or a related technical fieldDemonstrated interest or hands‑on experience with AI‑assisted development