Software Engineer - Visualization

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 As Harmattan AI develops advanced autonomous drone systems and payloads for defense applications, our engineering teams are scaling rapidly. To support this growth, our internal Tooling team needs a dedicated Software Engineer - Visualization to build the software infrastructure that accelerates development, testing, and validation. In this role, you will design and deliver the critical internal tools that allow our Guidance, Navigation, and Control (GNC), Machine Learning (ML), Embedded Software, and Validation teams to see, explore, and make sense of massive datasets—including telemetry, sensor data, simulation outputs, flight paths, and complex 3D scenes. You will have high ownership and direct mission impact, building infrastructure used daily across all technical teams. RESPONSIBILITIES - Design & Development: Design, develop, and maintain high-performance visualization tools, telemetry dashboards, data plotting software, and 3D scene viewers from scratch. - Architecture & API Design: Define clean, sustainable solutions (architecture, internal APIs, and intuitive user interfaces) responding to specific technical needs from engineering teams. - Pipeline Integration: Ensure all custom visualization tools integrate seamlessly into the company's automated CI/CD and data processing pipelines. - Performance Optimization: Analyze and continuously optimize the performance, rendering, and responsiveness of visualization tools handling real-world data at scale. - Cross-Functional Collaboration: Partner directly with user teams (GNC, ML, Embedded, Validation) to translate operational feedback and field requirements into technical specifications. - Quality Assurance: Write clean, robust code, contribute to tests, improve automated quality evaluations, and document workflows via tutorials. - Technical Standards: Set technical standards for internal software tools and mentor junior developers as the organization scales. CANDIDATE REQUIREMENTS TECHNICAL COMPETENCIES & EXPERIENCE - Professional Experience: Minimum of 3 years of professional software engineering experience, ideally with a background in robotics, aerospace, or building specialized data visualization platforms. - Core Languages: Strong, production-grade software development skills in C++ and Python. - UI Frameworks: Solid experience building desktop user interfaces or visualization…