Software Engineer - Photogrammetry

We are looking for a Software Engineer to join our Geometric Scene Understanding team in Paris. In this role, you will bridge the gap between complex mathematical research and mission-critical production software. While our Computer Vision (CV) engineers design the core algorithms for 3D reconstruction-such as SfM, SLAM, and Neural Radiance Fields-you will be responsible for transforming these computationally heavy prototypes into high-performance, real-time engines capable of running on resource-constrained tactical hardware.

You will be the architect of the pipeline that ingests live drone telemetry and video to output a real-time 3D rendering of the battlefield, providing a decisive edge for the Common Operational Picture (COP)., * High-Performance Pipeline Construction: Architect and build the software pipeline to ingest, decode, and perfectly synchronise multi-drone video streams and telemetry data.

• Hardware Acceleration: Profile CV algorithms and rewrite bottlenecks using GPU acceleration (CUDA, Vulkan, or TensorRT) and CPU multi-threading to achieve near real-time 3D reconstruction.
• Spatial Data Management: Implement efficient 3D data structures, such as Octrees or Voxel grids, to store, compress, and stream point clouds or meshes without compromising system memory.
• Prototype-to-Production Translation: Collaborate with CV engineers to translate Python/PyTorch prototypes into production-grade C++ code that can run for hours without heap fragmentation or leaks.
• Hardware-in-the-Loop (HITL) Testing: Deploy builds to physical tactical PCs and monitor real-world performance, including thermal throttling and GPU utilisation during live drone operations.

Do you have experience in Python?, * Educational Background: A BS or MS in Computer Science, Computer Engineering, or a closely related field. Strong foundational knowledge of Linear Algebra, 3D Geometry, and Computer Architecture is critical.

• Technical Mastery: Absolute mastery of C++ and low-level memory management. Deep expertise in GPU programming (writing custom CUDA kernels) is required.
• Proven Experience: * Minimum of 5-6 years of experience for senior-level candidates.
• Track record of shipping high-performance software in production, such as game engines, rendering pipelines, or autonomous vehicle perception stacks.
• Experience optimising complex algorithms for edge devices or embedded systems under strict real-time constraints.
• Systems Engineering: Ability to design ingestion buffers for asynchronous, high-bandwidth data streams (e.g., video at 30fps and telemetry at 100fps) ensuring temporal alignment.
• Adaptability & Mission Focus: Thrives in a fast-paced startup environment and is 100% dedicated to building ethical defensce technologies that bring a strategic edge to allied nations.
• Communication: Excellent verbal and written communication skills to lead syncs between CV research teams and C2 backend modules

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.