# C2 Software Frontend Engineer at Harmattan AI

C2 Software Frontend Engineer at Harmattan AI in Paris. On-site, full-time. Posted March 2, 2026.

- Company: Harmattan AI
- Location: Paris
- Workplace: On-site
- Job type: Full-time
- Experience: 5+ years
- Posted: 2026-03-02
- Apply: https://jobs.ashbyhq.com/harmattan-ai/7a517f58-1760-4fb4-8fab-a21b9079a08e/application
- Source: https://jobmagic.ai/jobs/c2-software-frontend-engineer-harmattan-ai-bgh3b6

## 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 frontend architecture.
- Adaptability: Ability to thrive in a fast-paced, multi-disciplinary startup environment.

## Description

### **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 frontend 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.