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 — https://(Use the "Apply for this Job" box below)..ai

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.

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.

• 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

• Strong professional experience with Type Script 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

• 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: Type Script, 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

This job is part of Linked In’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.