C2 Software Frontend Engineer

About Us

Harmattan AI is a next-generation defense prime building autonomous and scalable defense systems. Following the close of a $200M Series B, valuing the company at $1.4 billion, we are expanding our teams and capabilities to deliver mission-critical systems to allied forces.

Our work is guided by clear values: building technologies with real-world impact, pursuing excellence in everything we do, setting ambitious goals, and taking on the hardest technical challenges. We operate in a demanding environment where rigor, ownership, and execution are expected.

About the Role

We are seeking a highly skilled Front-End Engineer to join our C2 Core team in Paris . In this role, you will be responsible for the operator's viewport into the battlefield, building the Human-Machine Interface (HMI) for our tactical Command and Control (C2) system.

You will enter a context where cognitive load management is just as critical as software performance. The UI you build will run on tactical PCs in the field, requiring seamless real-time updates for the Common Operational Picture (COP) , rendering multiple live video streams, and providing an intuitive interface for planning missions and commanding a fleet of robots.

Responsibilities

• COP Visualization : Build interactive maps and 2D/3D geospatial overlays displaying real-time robot telemetry, sensor data, and mission routes.
• Real‑Time Video Grid : Develop a low‑latency, resilient video player interface capable of handling multiple simultaneous streams without freezing the main UI thread.
• Mission Planning & Command : Create interactive tools for operators to draw waypoints, set mission parameters, and issue instant commands to the fleet.
• Performance Architecture : Design a state management system capable of processing high‑frequency data from the backend bus without causing UI jitter or memory leaks.
• Collaborative Development : Work closely with UX/UI designers, backend engineers, and mission planning algorithm designers to refine workflows and ensure absolute minimum clicks for the operator.
• Optimisation : Ensure the UI maintains strict performance benchmarks, such as consistent 60fps rendering , even during high‑frequency map updates.

Candidate Requirements

• Educational Background : B.S. or M.Sc in Computer Science, Software Engineering, or a related field.
• Professional Experience : At least 5‑6 years of experience shipping production‑grade web applications with complex data visualisation.
• Technical Expertise
  • Deep understanding of complex state management and real‑time data flow.
  • Experience with geospatial mapping libraries (e.g., Mapbox, Leaflet, Cesium) or rendering APIs (WebGL, Canvas).
  • Familiarity with modern frameworks like React or Vue.
• Domain Knowledge : Previous experience in defense, aerospace, fintech, or high‑reliability domains where real‑time data rendering is critical.
• UX & Cognitive Load Awareness : High degree of user empathy; ability to design interfaces for high‑stress environments where operators cannot afford distractions or confusing error states.
• Proven Leadership & Ownership : A "mission‑driven" and "product‑oriented" mindset with a willingness to take full ownership of the front‑end architecture.
• Adaptability : Ability to thrive in a fast‑paced, multi‑disciplinary startup environment.

We look forward to hearing how you can help shape the future of autonomous defense systems at Harmattan AI.