Senior Software Engineer, React | Endpoint State and Control

NinjaOne is investing in a new Endpoint State and Control team, and they're looking for a Senior Software Engineer, React to help build it from the ground up. The role involves designing and building new frontend surfaces, leading UI technical design, and collaborating with cross-functional teams to define architecture and component structures.

Responsibilities:

• Design and build new frontend surfaces for the Endpoint State and Control team from scratch, with real input into architecture, component structure, and conventions from day one
• Lead UI technical design end-to-end for your features — defining API contracts alongside backend engineers, architecting components, and setting the test strategy
• Translate Figma designs into accurate, production-ready UI, while pushing back with informed engineering and UX perspective when a design needs to flex for feasibility
• Write and maintain thorough unit and integration tests (Jest, React Testing Library) as a non-negotiable part of shipping any component
• Help establish the patterns, standards, and shared components that will shape how the Endpoint State and Control team builds going forward
• Partner cross-functionally with backend engineers, designers, and product managers as the team's roadmap and priorities take shape
• Bring AI tools into your day-to-day development workflow and help the team figure out where they genuinely speed things up
• Other duties as needed

Requirements:

• 7+ years of frontend engineering experience, with expert-level React (18+) and TypeScript
• A track record building complex, data-driven UI — tables, modals, multi-step forms, or other intricate interfaces — from the ground up
• Experience with React Query (TanStack Query) or an equivalent server-state management approach
• Strong testing habits: you write and maintain unit and integration tests (Jest, React Testing Library or similar) as a matter of course, not an afterthought
• Comfortable working from Figma designs with high fidelity, and confident enough in your craft to push back with an engineering or UX rationale when needed
• Experience leading technical design for a feature end-to-end — from API contract through component architecture to test strategy
• Comfortable operating in ambiguity — you enjoy standing up new patterns and making foundational decisions rather than working within an established codebase
• Curious about and comfortable experimenting with AI tools as part of your development workflow
• Experience with Java 11+ or Kotlin (reading and contributing to backend code)
• Experience standing up a frontend codebase or team from scratch
• Familiarity with pnpm monorepos and shared component libraries
• Accessibility compliance experience in enterprise B2B products, and prior work in endpoint management, IT operations, or security tooling