UX Developer (Frontend Systems & Design at Scale)

UX Developer (Frontend Systems & Design at Scale) Location: Bellevue, WA (4+ days onsite) Role Type: Full-Time Start Date: ASAP Company: Watchtower Labs — Company Overview Watchtower Labs is an early-stage, well-funded startup founded by leaders across national security operations, commercial technology investing, and large-scale distributed systems engineering. Our team merges real-world operational experience with deep technical expertise to build AI-native systems designed for critical, mission-driven environments. With guaranteed Department of Defense contracts, we are focused on delivering software that supports human decision-making in complex, high-stakes scenarios. Role Description As a UX Developer focused on Frontend Systems & Design at Scale, you will build the interfaces that translate complex simulation data and AI-driven behaviors into intuitive, high-performance operator experiences. This role sits at the intersection of engineering, product, and design, with a strong emphasis on craft, usability, and scalability. You’ll often operate with minimal design oversight, owning interaction decisions and frontend architecture for mission-critical systems used in real-world operations. Responsibilities Build and maintain reusable, high-quality UI components and frontend systems Translate complex simulation outputs and agent behaviors into clear, usable interfaces Own frontend architecture decisions, interaction paradigms, and component design Collaborate closely with backend and AI engineers to build data-rich, real-time UIs Ensure frontend performance, reliability, and scalability in mission-critical contexts Establish frontend patterns and UX standards that scale with product complexity Iterate quickly while maintaining a high bar for polish, usability, and clarity Basic Qualifications Strong professional experience with TypeScript and modern frontend frameworks Hands-on experience building production UIs with React and modern tooling (Vite or similar) Excellent UX instincts with strong attention to interaction details and usability Ability to independently translate ambiguous requirements into thoughtful UX solutions Comfort working onsite in a fast-moving startup environment Preferred Qualifications Experience designing and maintaining reusable component libraries or design systems Background working on complex, data-dense, or real-time user interfaces Familiarity collaborating closely with backend and AI teams Interest in simulation systems, AI-driven products, or operational software Strong product mindset and bias toward ownership Frontend: TypeScript, React Tooling: Vite, modern build systems Systems: Data-rich, real-time interfaces tied to simulation and AI platforms Benefits: Health, dental, and vision insurance; 401(k) plan Growth Path: Opportunity for expanded ownership and leadership as the company scales Additional Job Application Terms This job is part of LinkedIn’s Full-Service Hiring beta program. Eligibility is limited to candidates located in and performing services in the United States, excluding those based in Alaska, Hawaii, Nevada, South Carolina, or West Virginia. We’re committed to making our hiring process as smooth and timely as possible, and we understand that waiting to hear back can add to the anticipation. If you’re a potential fit, our team will reach out within two weeks to progress you to the next stage. If you don’t hear from us in that time, we encourage you to explore other opportunities with our team in the future, and we wish you the very best in your job search. #J-18808-Ljbffr Watchtower Labs