Senior Quantum Software Engineer (Quantum Software Stack) - M/W

About PASQAL

PASQAL builds neutral-atom quantum computers and the full software stack required to run impactful hybrid quantum-classical workloads. Our quantum software ecosystem spans open- and closed-source libraries, developer tooling, documentation, and production-grade interfaces used by internal teams and external users.

Job description

As a Senior Quantum Software Engineer, you will develop, optimize, and maintain PASQAL’s ecosystem of quantum solver libraries: libraries featuring algorithms for neutral-atom quantum computers. This includes classical and quantum algorithms for graph machine learning, optimization, and quantum simulation use cases.

You will bridge research and production engineering: turning algorithmic ideas into robust, maintainable, well-tested software, while ensuring interoperability across the software stack and strong developer experience.

Key Responsibilities

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Improve performance, reliability, and maintainability of production codebases.

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Transfer research ideas from quantum algorithm teams into production-grade code.

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Produce structured, documented, tested implementations with strong quality standards.

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Ensure interoperability of the application software stack with other libraries.

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Actively contribute to the development and productization strategy of the quantum software stack.

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Drive strong API UX with clear migration paths, versioning, and breaking-change management.

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Support backwards compatibility and deprecation practices.

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Promote best practices for benchmark design and statistical rigor.

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Contribute to backend/platform engineering topics: job orchestration, reliability, observability.

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Support packaging and release engineering

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Apply security-minded engineering practices (dependency scanning, SBOMs, SAST/CodeQL mindset).

Required Qualifications

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Education & experience

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Master’s degree in Physics, Mathematics, Computer Science, or equivalent.

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Minimum 5 years of software development experience in industry/research/open-source projects.

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Software engineering excellence

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Strong experience with software best practices in collaborative environments (code review, CI/CD, testing).

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Excellent writing of production-level Python.

Preferred / Nice-to-have

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Open-source contributions.

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Quantum computing knowledge.

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Backend/platform experience (API design, services, reliability/observability).

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Packaging & release engineering (wheels, manylinux, dependency constraints, deprecations).

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Security & software supply-chain practices.

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Familiarity with optimization (MILP/MIQP, constraint programming, metaheuristics) and/or OR frameworks.

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Familiarity with ML frameworks (e.g., PyTorch, JAX).

What we offer

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Offices in Palaiseau, France

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Type of contract: permanent

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A dynamic and close-knit international team

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A key role in a growing start-up

Recruitment process

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An interview with our Talent Acquisition Specialist of 45'.

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An exchange with our Hiring Manager

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A technical assessment

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A meeting with the team in our offices and a meeting with our Chief Software Officer

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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.