Principal Engineer, Real-Time Visualization

About the role

Most frontend roles ask you to move pixels around a dashboard. This one asks you to architect the interface that controls the largest drone swarm on the planet. You'll lead the frontend architecture for Legion's Command & Control platform: the software that lets a single operator plan, direct, and execute missions across a networked swarm of heterogeneous aircraft, in real time, over intermittent comms, at a scale nobody else in the industry is attempting. This isn't CRUD. It's real-time, dense telemetry visualization, and interface design for a problem space that barely has prior art.

What You'll Do

• Own and architect the frontend for a C2 system directing swarms of heterogeneous aircraft
• Build real-time, collaborative interfaces for controlling large numbers of aircraft simultaneously, even when comms drop
• Design and ship new UI concepts for representing vehicle telemetry, sensor data, scheduling, crew resources, data link management, and more, much of it with no existing playbook to follow
• Set the frontend architecture, patterns, and standards that the rest of the team builds on
• Ship early, ship often, backed by strong CI/CD, QA, and DevSecOps

What You've Done

• Degree in Computer Science or equivalent experience
• 8+ years building complex, production frontend applications, with a track record of owning frontend architecture
• Deep experience building production web interfaces with React or a comparable modern framework
• Experience mentoring engineers and setting technical direction for a frontend team

What Sets You Apart

• Experience with both immediate mode (games, simulation) and retained mode UI paradigms
• A track record with performance-sensitive application development
• Familiarity with video streaming protocols
• Good UI/UX instincts
• WebGL/OpenGL experience
• Experience with geospatial applications

Why This Role

You'll be one of the earliest engineers shaping how humans command autonomous systems at scale, work that's currently being defined in real time, by a small team, with your fingerprints on the architecture. If you want to build the future of human-swarm interaction rather than maintain someone else's, this is that seat.

What We Offer

• Meaningful equity in a high-growth defense technology company
• Competitive base salary commensurate with experience
• Medical, dental, vision, and 401k
• PTO and paid sick leave
• Monthly wellness stipend
• Daily catered lunch (office)
• Paid parental leave
• Direct impact on a critical national security mission
• A world-class team of engineers and operators solving genuinely hard problems