Quantum Optics Scientist - QPU Prototyping

📍 Job Overview

Job Title: Quantum Optics Scientist - QPU Prototyping

Company: Quandela

Location: Massy, Île-de-France, France

Job Type: Full-Time

Category: Science & Research / Engineering / Technology

Date Posted: October 1, 2026

Experience Level: 5-10 Years (Mid-Senior Level)

Remote Status: On-site

🚀 Role Summary

• Drive the transition of advanced quantum optics experiments into stable, integrated hardware modules for Quandela's Quantum Processing Units (QPUs).

• Design, assemble, align, measure, and stabilize complex free-space and fibered optical systems to push performance, reproducibility, and stability across the quantum computing stack.

• Develop pragmatic Python tools for laboratory automation, data acquisition, calibration, and analysis to accelerate experimental work and facilitate team-wide adoption.

• Collaborate closely with cross-functional teams including optics, electronics, semiconductors, and software engineers to ensure seamless integration and validation of QPU modules.

• Contribute to the continuous improvement of qubit fidelity and system stability by isolating noise sources and implementing robust fixes.

📝 Enhancement Note: This role is crucial for scaling Quandela's quantum computing capabilities, bridging the gap between theoretical quantum optics research and practical, operational quantum processors. The focus on "operational hardware" and "cloud-ready QPU modules" indicates a strong emphasis on productization and industrialization of quantum technologies.

📈 Primary Responsibilities

• Prototype, build, and enhance quantum optics modules, including interferometers, correlation benches, and single-photon sources.

• Design, assemble, align, measure, and stabilize complex free-space and fibered optical systems with high precision.

• Integrate newly developed modules into the QPU, perform online debugging, optimize performance against specifications, and hand over with comprehensive procedures and test plans.

• Monitor and track loss and drift in integrated modules, identify noise sources, and implement effective fixes to enhance system stability and qubit fidelity.

• Develop and maintain Python scripts and utilities for experimental data acquisition, calibration, analysis, and visualization that are practical and reusable by teammates.

• Create detailed lab notes, operational procedures, and reproducible test protocols to ensure system understanding and operability by others.

• Collaborate effectively with peers across optics, electronics, semiconductor, and software engineering disciplines throughout the full stack of QPU development.

• Contribute to the design and development of next-generation QPUs, incorporating new features and advanced functionalities.

📝 Enhancement Note: The responsibilities emphasize a hands-on, experimental approach combined with rigorous documentation and collaborative integration. The progression from "experimental setups" to "robust processors that support feedforward and error correction" highlights the strategic importance of this role in advancing quantum computing technology.

🎓 Skills & Qualifications

Education:

• PhD in Quantum Optics, Experimental Physics, Photonics, or a related field. Experience:

• 5-10 years of demonstrated experience in hands-on experimental quantum optics, with a strong focus on translating research into operational hardware.

• Proven track record in designing, assembling, aligning, and stabilizing complex free-space and fibered optical systems.

• Experience in developing and implementing robust documentation and reproducible test protocols for complex experimental setups. Required Skills:

• Quantum Optics Experiments: Deep understanding and practical experience in photon-based quantum systems, such as quantum correlations, Hong-Ou-Mandel interference, or photon indistinguishability setups.

• Hands-on Experimental Optics: Expertise in complex optical system design, alignment, metrology, and stabilization techniques for both free-space and fibered configurations.

• Python for Lab Automation: Proficiency in developing pragmatic Python scripts for data acquisition, calibration, analysis, and quick plotting to accelerate experimental workflows.

• Documentation Discipline: Strong ability to produce clear feedback, detailed procedures, and reproducible test protocols that enable others to operate and maintain systems.

• Problem-Solving & Debugging: Aptitude for identifying and resolving complex issues in optical systems and experimental setups.

Preferred Skills:

• Basic Electronics for the Bench: Familiarity with safe operation of optical equipment, light soldering, data acquisition (DAQ) systems, and electronic drivers.

• Semiconductor Awareness: Understanding of quantum-dot sources, optical couplings, and component packaging relevant to photonic quantum systems.

• Experience with PICs: Familiarity with Photonic Integrated Circuits.

• Cryogenics: Experience working with cryogenic systems, if applicable to specific quantum optics experiments.

• Optimal Control: Knowledge of optimal control techniques in quantum systems.

• Firmware/FPGA: Exposure to firmware development or Field-Programmable Gate Arrays.

📝 Enhancement Note: The "Must-Have" and "Important (can grow here)" sections indicate a clear preference for candidates who can immediately contribute to QPU prototyping while offering opportunities for skill development in related areas like electronics and semiconductor physics. The emphasis on "pragmatic Python tools" suggests a need for practical, efficient coding solutions over highly complex software engineering.

📊 Process & Systems Portfolio Requirements

Portfolio Essentials:

• QPU Module Development Case Studies: Showcase projects where you designed, built, and stabilized optical modules for quantum or photonics applications. Detail the challenges, your approach, and the performance improvements achieved.

• Experimental Setup Documentation: Present examples of detailed lab notes, operational procedures, and test protocols you've created, demonstrating your ability to ensure reproducibility and facilitate handover.

• Python Automation Scripts: Include examples of Python tools developed for data acquisition, calibration, or analysis that significantly improved experimental efficiency or accuracy. Highlight their practical application and reusability.

• Performance Optimization Examples: Provide evidence of your ability to diagnose and resolve issues in optical systems, leading to measurable gains in stability, fidelity, or efficiency. Quantify the impact of your interventions.

Process Documentation:

• Workflow Design & Optimization: Demonstrate how you approach the design, assembly, alignment, and stabilization of complex optical systems, outlining your methodical steps and quality control measures.

• Integration & Automation: Detail your experience in bringing experimental modules online, debugging them, and integrating them into larger systems, including any automation strategies employed.

• Measurement & Analysis: Explain your methods for characterizing optical system performance, analyzing experimental data, and validating results against specifications, with a focus on identifying and mitigating noise and drift.

📝 Enhancement Note: For this role, the portfolio should heavily emphasize practical, hands-on experience with optical systems and demonstrable Python scripting skills for laboratory automation. Case studies should clearly articulate the transition from experimental concept to a stable, functional component within a larger system, with a strong focus on process documentation and reproducibility.

💵 Compensation & Benefits

Salary Range:

• Based on industry benchmarks for PhD-level Quantum Optics Scientists with 5-10 years of experience in the Île-de-France region, a competitive salary range is estimated between €65,000 - €90,000 annually. This range accounts for the specialized nature of quantum technology, the required advanced education, and hands-on experimental expertise. Benefits:

• Health Coverage: 100% health coverage provided by Alan, ensuring comprehensive medical care.

• Meal Vouchers: Provided through Swile, offering a convenient way to cover daily food expenses.

• Fitness Support: Access to Gymlib for fitness and wellness activities, promoting a healthy lifestyle.

• Childcare Assistance: Support provided to help with childcare costs, easing work-life balance.

• Referral Bonuses: Financial incentives for successfully referring new hires (€1,000–€2,000), encouraging team growth.

• Profit-Sharing: Participation in the company's success through a profit-sharing scheme.

• Company Savings Plan: Opportunity to invest in the company's future and build personal savings.

Working Hours:

• Standard full-time position, typically around 40 hours per week. While on-site presence is required, Quandela may offer some flexibility in daily scheduling, common in R&D environments, to accommodate experimental needs and personal work-life balance.

📝 Enhancement Note: The salary estimation is based on typical compensation for highly skilled scientific roles in advanced technology sectors in France, considering the specific expertise in quantum optics and the company's position as a leader in the field. The listed benefits are directly from the job description and are highly attractive for attracting top talent.

🎯 Team & Company Context

🏢 Company Culture

Industry: Quantum Computing / Photonics / Advanced Technology. Quandela is at the forefront of developing industrial-grade photonic quantum computers, aiming to solve complex challenges across various sectors.

Company Size: The provided information does not specify the exact company size from the LinkedIn data, but the URL structure and the mention of "teams" and "peers" suggest a growing organization with multiple specialized groups.

Founded: Quandela was founded in 2017, indicating a relatively young but rapidly advancing company with established expertise in quantum technology development.

Team Structure:

• QPU Prototyping Team: This is the core team for this role, focused on building the optical heart of quantum processors. It comprises specialists in quantum optics, photonics, and related hardware integration.

• Cross-functional Collaboration: The role emphasizes working with optics, electronics, semiconductor, and software engineers, highlighting a highly integrated and collaborative R&D environment.

• Reporting Structure: While not explicitly defined, typical structures in such companies involve reporting to a Team Lead or Head of Engineering/Research, with opportunities to mentor junior members.

Methodology:

• Experimental-to-Operational Transition: The team's primary methodology involves translating cutting-edge quantum optics experiments into stable, reproducible, and operational hardware modules for QPUs.

• Data-Driven Iteration: Emphasis on rigorous measurement, data acquisition, analysis, and documentation to drive continuous improvement in performance, stability, and fidelity.

• Pragmatic Tool Development: Focus on creating practical, reusable Python tools to enhance experimental efficiency and collaboration.

Company Website: Quandela | Leading Photonic Quantum Computing Solutions

📝 Enhancement Note: Quandela's focus on "pragmatic, step-by-step roadmap" and "deploying industrial-grade systems since 2023" suggests a company that balances ambitious innovation with practical execution. The culture likely values precision, collaboration, and a strong drive to productize advanced technology.

📈 Career & Growth Analysis

Operations Career Level: This position is at a Mid-Senior to Senior Scientist/Engineer level. It requires a PhD and 5-10 years of relevant experience, indicating a role with significant technical expertise and responsibility. The scope involves owning specific QPU modules, contributing to system-level performance, and potentially mentoring junior team members.

Reporting Structure: The role involves close collaboration with peers and likely reports to a QPU Prototyping Team Lead or an R&D Manager. The emphasis on "hand over with clear procedures" suggests interaction with teams responsible for production or further system integration.

Operations Impact: The Quantum Optics Scientist directly impacts the core technology of Quandela's quantum computers. By improving module performance, stability, and scalability, this role is critical in enabling the company's roadmap towards more powerful, fault-tolerant quantum computers. Success here directly translates to increased qubit counts, higher fidelity, and ultimately, the company's ability to solve more complex problems for its customers.

Growth Opportunities:

• Technical Specialization: Deepen expertise in specific areas of quantum optics, photonics, or QPU module design.

• Project Leadership: Progress to leading specific QPU module development projects or taking ownership of larger areas of the QPU.

• Mentorship: Grow into a role where you mentor junior scientists and engineers, sharing your expertise and guiding their development.

• Optics Lead Role: Potential to advance into an "Optics Lead" position, overseeing the optical engineering aspects of QPU development and strategy.

• Cross-functional Expertise: Gain broader understanding and experience across the entire quantum computing stack, from hardware to software.

📝 Enhancement Note: The described growth path, from owning a bench to potentially becoming an Optics Lead, indicates a clear career progression within Quandela for individuals who excel in this role. The company's ambition in quantum computing suggests ample opportunities for professional development and impact.

🌐 Work Environment

Office Type: This is an on-site role, implying a professional laboratory and office environment within Quandela's facilities in Massy, France. The work will involve both hands-on laboratory experimentation and collaborative office-based work.

Office Location(s): Massy, Île-de-France, France. This location is part of the vibrant Paris-Saclay technology cluster, offering a stimulating environment for scientific and technological innovation.

Workspace Context:

• Laboratory Environment: Access to state-of-the-art quantum optics labs equipped for precise alignment, measurement, and stabilization of optical systems. This includes free-space and fibered optical setups.

• Collaborative Spaces: Opportunities for close interaction with a multidisciplinary team of optics, electronics, semiconductor, and software engineers, fostering a dynamic and innovative atmosphere.

• Tools & Technology: Access to essential laboratory equipment, Python development environments, and potentially specialized tools for optical metrology and system control.

Work Schedule: A standard full-time schedule (approx. 40 hours/week) is expected. Given the nature of experimental work, there might be some flexibility to accommodate specific experimental needs or data collection periods, but the role is fundamentally on-site.

📝 Enhancement Note: The work environment is characterized by a blend of rigorous experimental work in a dedicated lab setting and collaborative problem-solving with a diverse engineering team. Being located in the Paris-Saclay cluster provides access to a rich ecosystem of research and innovation.

📄 Application & Portfolio Review Process

Interview Process:

• Talent Acquisition Interview (30'-45'): Initial screening to assess overall fit, motivation, and basic qualifications. Be prepared to discuss your background and interest in quantum optics and Quandela.

• Hiring Manager Interviews (45'): In-depth discussion focusing on your technical expertise, experimental experience, and alignment with the team's goals.

• Use Case: This may involve either a live demonstration of your experimental skills or a take-home problem requiring you to design, analyze, or document a specific quantum optics setup or process. Prepare to present your approach and results.

• Reference Checks (2): Professional references will be contacted to verify your experience and performance.

• Meeting with the Teams: Opportunity to interact with potential future colleagues from various disciplines (optics, electronics, software) to assess cultural fit and collaborative potential.

• Offer: Formal job offer extended to the selected candidate.

Portfolio Review Tips:

• Showcase Quantifiable Impact: For each project, clearly articulate the problem, your solution, and the quantifiable results (e.g., improved fidelity by X%, reduced drift by Y%, increased throughput by Z%).

• Demonstrate Process Rigor: Highlight examples of your documentation, procedures, and test protocols. Emphasize how they ensure reproducibility and enable seamless handover.

• Highlight Python Automation: Present specific Python scripts or tools you've developed, explaining their purpose, functionality, and the efficiency gains they provided.

• Tell a Story: Structure your portfolio items as mini-case studies. Explain the context, your specific contributions, the challenges faced, and the lessons learned.

• Tailor to the Role: Emphasize experience directly relevant to QPU prototyping, optical system stabilization, and hands-on experimental work.

Challenge Preparation:

• Understand Quandela's Technology: Research Quandela's QPU architecture, photonic approach, and roadmap. Be ready to discuss how your skills contribute to their specific goals.

• Prepare for Technical Deep Dives: Brush up on core quantum optics principles (interference, correlations, indistinguishability), optical alignment techniques, metrology, and common sources of noise in optical systems.

• Practice Python Scripting: Be ready to discuss your Python development process, debugging strategies, and how you create reusable code for experimental applications.

• Articulate Collaboration: Prepare examples of how you've successfully collaborated with engineers from different disciplines to achieve project goals.

📝 Enhancement Note: The interview process suggests a thorough evaluation of both technical skills and collaborative abilities. The "Use Case" is a critical component, so candidates should prepare a strong portfolio that can be presented effectively, showcasing practical application of their skills.

🛠 Tools & Technology Stack

Primary Tools:

• Optical Design & Simulation Software: (e.g., Zemax, COMSOL, Lumerical) - While not explicitly mentioned, these are standard for optical system design and analysis.

• Optical Test & Measurement Equipment: Interferometers, spectrometers, photodetectors, oscilloscopes, signal generators, power meters.

• Lab Equipment: Optical benches, lasers, single-photon sources, fiber optics, mounts, alignment tools.

Analytics & Reporting:

• Python: The primary language for data acquisition, calibration, analysis, and visualization. Libraries such as NumPy, SciPy, Matplotlib, and potentially specialized scientific libraries are expected.

• Data Analysis Tools: Proficiency in analyzing experimental data to identify trends, noise sources, and performance metrics.

CRM & Automation:

• Python Scripting: Used for automating experimental sequences, data collection, and calibration routines.

• Version Control: Git is likely used for managing Python scripts and documentation.

• Documentation Platforms: Internal wikis, lab notebooks (digital or physical), and collaborative document tools.

📝 Enhancement Note: Python is explicitly highlighted as a key tool for laboratory automation. Candidates should be prepared to discuss their experience with Python for scientific applications, data handling, and scripting experimental setups. Proficiency with standard optical metrology equipment is also a must.

👥 Team Culture & Values

Operations Values:

• Precision & Rigor: A commitment to meticulous experimental work, accurate measurements, and robust documentation is paramount in quantum optics.

• Collaboration & Communication: Strong emphasis on working effectively across multidisciplinary teams, sharing knowledge, and providing clear feedback.

• Innovation & Problem-Solving: A culture that encourages creative solutions to complex technical challenges and a proactive approach to identifying and mitigating issues.

• Efficiency & Scalability: Focus on developing processes and hardware that are not only functional but also reproducible, stable, and scalable for industrial deployment.

• Ownership & Accountability: Taking responsibility for one's work, from experimental design to final handover, ensuring successful integration and performance.

Collaboration Style:

• Full-Stack Integration: Working seamlessly with colleagues in optics, electronics, semiconductors, and software to achieve integrated system performance.

• Knowledge Sharing: Encouraging the exchange of insights and best practices through clear documentation, lab notes, and team discussions.

• Iterative Improvement: A collaborative approach to reviewing experimental results, identifying areas for improvement, and jointly developing solutions.

• Pragmatic Approach: Valuing practical, effective solutions that move the project forward, rather than purely theoretical or overly complex implementations.

📝 Enhancement Note: Quandela appears to foster a culture of scientific excellence combined with pragmatic engineering. The values emphasize precision, collaboration, and a results-oriented mindset, crucial for a company pushing the boundaries of quantum computing.

⚡ Challenges & Growth Opportunities

Challenges:

• Bridging Research and Product: Translating cutting-edge, often experimental, quantum optics phenomena into stable, reliable, and manufacturable hardware modules presents significant engineering challenges.

• Achieving High Fidelity & Stability: Pushing qubit fidelity and system stability requires meticulous control over optical parameters, minimizing loss and drift in complex environments.

• Scalability of Photonic Systems: Developing methods to integrate thousands of photonic components reliably and efficiently is a fundamental challenge in scaling quantum computers.

• Interdisciplinary Complexity: Effectively collaborating across diverse fields (optics, electronics, semiconductors, software) requires clear communication and a shared understanding of system goals.

Learning & Development Opportunities:

• Advanced Quantum Optics: Deepen expertise in state-of-the-art quantum optics experiments and emerging technologies.

• QPU Architecture: Gain comprehensive knowledge of the entire quantum computing stack and how optical components integrate into functional QPUs.

• Hardware Engineering Practices: Develop skills in industrializing laboratory processes, implementing robust testing, and ensuring product-level reliability.

• Cross-functional Skill Development: Opportunities to learn about electronics, semiconductor fabrication, and software integration relevant to quantum computing.

• Leadership & Mentorship: Progress to leading technical projects and mentoring junior scientists, enhancing leadership capabilities.

📝 Enhancement Note: The challenges outlined are inherent to pioneering quantum computing technology. Quandela's environment offers significant opportunities for individuals to grow by tackling these complex problems and developing expertise across the full spectrum of quantum hardware development.

💡 Interview Preparation

Strategy Questions:

• "Describe a complex quantum optics experiment you designed and executed. What were the key challenges, how did you overcome them, and what were the measurable outcomes?" (Focus on your experimental design, problem-solving, and data analysis skills. Quantify results.)

• "How would you approach stabilizing a free-space optical interferometer to minimize drift over several hours?" (Demonstrate your understanding of optical alignment, environmental factors, and feedback mechanisms.)

• "Imagine you need to integrate a new single-photon source module into an existing QPU. What steps would you take from initial handover to final validation?" (Highlight your process for integration, debugging, and documentation.)

• "Can you provide an example of a Python script you developed for lab automation or data analysis? What problem did it solve, and what was its impact?" (Showcase your practical Python skills and ability to create reusable tools.) Company & Culture Questions:

• "Why are you interested in working at Quandela specifically, and what excites you about our approach to quantum computing?" (Research Quandela's mission, technology, and recent achievements. Align your motivations with their goals.)

• "How do you approach documentation and knowledge sharing within a technical team?" (Emphasize your commitment to clear, reproducible documentation and collaborative practices.)

• "Describe a time you had to collaborate with engineers from different disciplines. How did you ensure effective communication and achieve a shared goal?" (Provide a specific example demonstrating cross-functional teamwork.) Portfolio Presentation Strategy:

• Structure Your Case Studies: For each project, use a clear narrative: Problem -> Your Solution -> Implementation Details -> Results (quantified) -> Lessons Learned.

• Highlight Practical Application: Emphasize how your work directly contributed to a functional module or system, rather than just theoretical exploration.

• Showcase Documentation: Be ready to present examples of your lab notes, procedures, or test protocols to demonstrate your rigor.

• Live Demo/Walkthrough: If possible, be prepared to walk through a relevant Python script or a schematic of an optical setup you've worked on.

• Focus on Impact: Clearly articulate the "why" behind your work – how it improved performance, stability, or enabled further development.

📝 Enhancement Note: Interview preparation should focus on demonstrating a blend of deep scientific understanding, practical experimental skills, strong documentation discipline, and effective collaboration. Be ready to discuss specific projects and quantify your contributions.

📌 Application Steps

To apply for this Quantum Optics Scientist position:

• Submit your application through the provided application link on Workable.

• Tailor Your Resume: Highlight your PhD research, hands-on experimental optics experience, Python scripting for lab automation, and any experience with quantum optics phenomena (interference, correlations, indistinguishability). Use keywords from the job description.

• Prepare Your Portfolio: Curate examples of your work, focusing on optical system design, stabilization, documentation, and Python automation scripts. Be ready to present case studies of experimental projects and their outcomes.

• Research Quandela: Understand their QPU architecture, photonic approach, and current roadmap. Prepare thoughtful questions about their technology and the role's contribution.

• Practice Interview Responses: Rehearse answers to common technical and behavioral questions, especially those related to experimental design, problem-solving, collaboration, and your motivation for joining Quandela.

⚠️ Important Notice: This enhanced job description includes AI-generated insights and industry-standard assumptions. All details should be verified directly with the hiring organization before making application decisions.