C2 Software Frontend Engineer

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About this role

C2 Software Frontend Engineer Paris, Île-de-France, France 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

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