Senior Hardware Algorithm Developer - Quantum Register Team W/M

About Pasqal Pasqal designs and develops Quantum Processing Units (QPUs) and associated software tools. Our innovative technology enables us to address use cases that are currently beyond the reach of the most powerful supercomputers; these cases can concern industrial application challenges as well as fundamental science needs. In addition to the exceptional computing power they provide, QPUs are highly energy efficient and will contribute to a significant reduction in the carbon footprint of the HPC industry. Job Description At PASQAL, we build neutral-atom Quantum Processing Units (QPUs) where lasers, control systems and software meet cutting-edge physics. In the Quantum Register team , we develop algorithms that make qubit preparation scalable, fast, and reliable, a cornerstone for quantum simulation and error correction. We’re looking for experienced scientific software / algorithms engineer to take ideas from theory → simulation → experimental validation → production-grade software that directly improves register performance. Main responsibilities The ideal candidate will have a strong interest in developing and implementing algorithms that apply concepts from math, physics, statistics and engineering concepts to solve multi-disciplinary problems at the hardware and system level. What you’ll do System-level problem solving Convert hardware constraints specifications and physical principles into algorithmic architectures, interfaces, and functional block diagrams. Build a strong understanding of one of Pasqal’s algorithm library and how it connects to the wider software stack and hardware systems. R&D scientific software development & validation Explore algorithmic approaches through simulation, data analysis, and quantitative benchmarking. Run literature reviews / technology watch to bring relevant methods into the team. Define metrics, validate performance, and write clear test reports. Performance engineering Profile and optimize runtime and resource usage (CPU/GPU when relevant). Deliver reliable, scalable implementations with solid engineering practices. Interface solutions with lab/industrial instrumentation when needed. Collaboration & communication Work closely with software and hardware engineers to integrate algorithms from end-to-end. Present results to mixed audiences and document methodologies and architecture. What we are looking for Ideally 5+ years of experience managing, building and deploying scientific libraries, from R&D to production. Strong Python + software engineering best practices (testing, CI mindset, code quality). Foundations in applied math/physics (numerical methods, statistics, optimization, modeling). Bonus: C/C++/Rust, GPU/vectorization, ML experience. Clear written and spoken English (French is a plus). Ability to operate with autonomy, prioritize, and collaborate in multidisciplinary teams. What we offer Brand new offices in Massy A flexible rhythm of face-to-face work (2-3 days of telecommuting per week) Type of contract : CDI (permanent contract) A dynamic and close-knit international team A key role in a growing scaleup Free time to train and go to conferences/meetups Recruitment process An interview with our people acquisition team of 30'. An exchange with your futur manager A technical use case A meeting with the team in our offices An offer ! PASQAL is an equal opportunity employer. We are committed to creating a diverse and inclusive workplace, as inclusion and diversity are essential to achieving our mission. We encourage applications from all qualified candidates, regardless of gender, ethnicity, age, religion or sexual orientation.