Algorithm Developer - Register Team W/M

Algorithm Developer - Register Team W/M

Participate in the rapid development of a deep-tech start-up at the forefront of the second quantum revolution!

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 an experienced scientific software/algorithms engineer to take ideas from theory → simulation → experimental validation → production-grade software that directly improves register performance.

Responsibilities

• Convert hardware constraints specifications and physical principles into algorithmic architectures, interfaces, and functional block diagrams.
• Build a strong understanding of Pasqal’s algorithm library and how it connects to the wider software stack and hardware systems.
• 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.
• 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.
• Work closely with software and hardware engineers to integrate algorithms from end-to-end.
• Present results to mixed audiences and document methodologies and architecture.

Qualifications

• Ideally 5+ years of experience managing, building and deploying scientific libraries, from R&D to production.
• Strong Python and 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.

Benefits

• Brand new offices in Massy.
• Flexibility: 2-3 days telecommuting per week.
• Contract: CDI (permanent).
• Dynamic and close-knit international team.
• Key role in a growing scale-up.
• Free time to train and attend conferences/meetups.

Equal Opportunity Statement

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.