# C2 Software Frontend Engineer at Harmattan AI

> Open job at Harmattan AI in Paris, France. Workplace: On-site.

Source: France Dev Jobs, https://francedevjobs.com/jobs/harmattan-ai-c2-software-frontend-engineer-nmdu6xd
Posted 2 March 2026. Last checked on the employer's career site: 10 November 2026.

## Facts

- Company: [Harmattan AI](https://francedevjobs.com/companies/harmattan-ai)
- Location: Paris, France
- Workplace: On-site
- Employment type: Full-time
- French: Not required
- Skills: React, Vue.js
- Not mentioned in the job post: salary, visa sponsorship, relocation, where you can apply from

## Job 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](http://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.

## How to apply

Apply on the job page, https://francedevjobs.com/jobs/harmattan-ai-c2-software-frontend-engineer-nmdu6xd: its Apply button opens the employer's own application page.

## More jobs from Harmattan AI

- [Data Acquistion Module Lead](https://francedevjobs.com/jobs/harmattan-ai-data-acquistion-module-lead-g6zccpx): Harmattan AI, Paris, France. On-site. Posted 8 November 2026.
- [System Identification Engineer](https://francedevjobs.com/jobs/harmattan-ai-system-identification-engineer-2ehljnt): Harmattan AI, Paris, France. On-site. Posted 5 November 2026.
- [Embedded Software Engineer - Cybersecurity](https://francedevjobs.com/jobs/harmattan-ai-embedded-software-engineer-cybersecurity-agtfwiv): Harmattan AI, Paris, France. On-site. Posted 4 November 2026.
- [Product Manager](https://francedevjobs.com/jobs/harmattan-ai-product-manager-21f6s19): Harmattan AI, Paris, France. On-site. Posted 3 November 2026.
- [IT Support Apprentice](https://francedevjobs.com/jobs/harmattan-ai-it-support-apprentice-bu02lxv): Harmattan AI, Paris, France. On-site. Posted 2 November 2026.