Senior Quantum Software Engineer Quantum Software Stack - M - W - Pasqal H/F - PASQAL

About PASQALPASQAL 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 descriptionAs 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 ResponsibilitiesImprove performance, reliability, and maintainability of production codebases.Transfer research ideas from quantum algorithm teams into production-grade code.Produce structured, documented, tested implementations with strong quality standards.Ensure interoperability of the application software stack with other libraries.Actively contribute to the development and productization strategy of the quantum software stack.Drive strong API UX with clear migration paths, versioning, and breaking-change management.Support backwards compatibility and deprecation practices.Promote best practices for benchmark design and statistical rigor.Contribute to backend/platform engineering topics: job orchestration, reliability, observability.Support packaging and release engineeringApply security-minded engineering practices (dependency scanning, SBOMs, SAST/CodeQL mindset).Required QualificationsEducation & experienceMaster's degree in Physics, Mathematics, Computer Science, or equivalent.Minimum 5 years of software development experience in industry/research/open-source projects.Software engineering excellenceStrong experience with software best practices in collaborative environments (code review, CI/CD, testing).Excellent writing of production-level Python.Preferred / Nice-to-haveOpen-source contributions.Quantum computing knowledge.Backend/platform experience (API design, services, reliability/observability).Packaging & release engineering (wheels, manylinux, dependency constraints, deprecations).Security & software supply-chain practices.Familiarity with optimization (MILP/MIQP, constraint programming, metaheuristics) and/or OR frameworks.Familiarity with ML frameworks (e.g., PyTorch, JAX).What we offerOffices in Palaiseau, FranceType of contract: permanentA dynamic and close-knit international teamA key role in a growing start-upRecruitment processAn interview with our Talent Acquisition Specialist of 45'.An exchange with our Hiring ManagerA technical assessmentA meeting with the team in our offices and a meeting with our Chief Software OfficerAn 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.About PASQALPASQAL 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 descriptionAs 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 ResponsibilitiesImprove performance, reliability, and maintainability of production codebases.Improve performance, reliability, and maintainability of production codebases.Transfer research ideas from quantum algorithm teams into production-grade code.Transfer research ideas from quantum algorithm teams into production-grade code.Produce structured, documented, tested implementations with strong quality standards.Produce structured, documented, tested implementations with strong quality standards.Ensure interoperability of the application software stack with other libraries.Ensure interoperability of the application software stack with other libraries.Actively contribute to the development and productization strategy of the quantum software stack.Actively contribute to the development and productization strategy of the quantum software stack.Drive strong API UX with clear migration paths, versioning, and breaking-change management.Drive strong API UX with clear migration paths, versioning, and breaking-change management.Support backwards compatibility and deprecation practices.Support backwards compatibility and deprecation practices.Promote best practices for benchmark design and statistical rigor.Promote best practices for benchmark design and statistical rigor.Contribute to backend/platform engineering topics: job orchestration, reliability, observability.Contribute to backend/platform engineering topics: job orchestration, reliability, observability.Support packaging and release engineeringSupport packaging and release engineeringApply security-minded engineering practices (dependency scanning, SBOMs, SAST/CodeQL mindset).Apply security-minded engineering practices (dependency scanning, SBOMs, SAST/CodeQL mindset).Required QualificationsEducation & experienceEducation & experienceMaster's degree in Physics, Mathematics, Computer Science, or equivalent.Master's degree in Physics, Mathematics, Computer Science, or equivalent.Minimum 5 years of software development experience in industry/research/open-source projects.Minimum 5 years of software development experience in industry/research/open-source projects.Software engineering excellenceSoftware engineering excellenceStrong experience with software best practices in collaborative environments (code review, CI/CD, testing).Strong experience with software best practices in collaborative environments (code review, CI/CD, testing).Excellent writing of production-level Python.Excellent writing of production-level Python.Preferred / Nice-to-haveOpen-source contributions.Open-source contributions.Quantum computing knowledge.Quantum computing knowledge.Backend/platform experience (API design, services, reliability/observability).Backend/platform experience (API design, services, reliability/observability).Packaging & release engineering (wheels, manylinux, dependency constraints, deprecations).Packaging & release engineering (wheels, manylinux, dependency constraints, deprecations).Security & software supply-chain practices.Security & software supply-chain practices.Familiarity with optimization (MILP/MIQP, constraint programming, metaheuristics) and/or OR frameworks.Familiarity with optimization (MILP/MIQP, constraint programming, metaheuristics) and/or OR frameworks.Familiarity with ML frameworks (e.g., PyTorch, JAX).Familiarity with ML frameworks (e.g., PyTorch, JAX).What we offerOffices in Palaiseau, FranceOffices in Palaiseau, FranceType of contract: permanentType of contract: permanentA dynamic and close-knit international teamA dynamic and close-knit international teamA key role in a growing start-upA key role in a growing start-upRecruitment processAn interview with our Talent Acquisition Specialist of 45'.An interview with our Talent Acquisition Specialist of 45'.An exchange with our Hiring ManagerAn exchange with our Hiring ManagerA technical assessmentA technical assessmentA meeting with the team in our offices and a meeting with our Chief Software OfficerA meeting with the team in our offices and a meeting with our Chief Software OfficerAn offer!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.Joining Pasqal will give you the opportunity to take an active part in the rapid development of a DeepTech scale-up at the forefront of the second quantum revolution. You will be directly involved in one of the biggest challenges shaping the technological landscape of the 21st century. You will be working as part of a team of top-level scientists and engineers, in direct competition with the world's biggest players.