- About Quandela:
Quandela is a European deeptech scale-up building modular, scalable and energy-efficient photonic and spin-optical quantum computers.
Our quantum computing platform is accessible both through the cloud and on-premises.
With a team of more than 140 people, we develop our own hardware and software stack, from semiconductor quantum emitters and photonic processors to quantum control systems and quantum algorithms.
Our ambition is to build large-scale fault-tolerant quantum computers capable of solving problems beyond the reach of classical computation using Quandela's cutting-edge quantum dot technology.
Achieving this vision requires not only advances in photonic quantum computing, but also the development of scalable spin-photon interfaces, distributed entanglement capabilities and future SPOQC (Spin-Optical Quantum Computing) architectures that will enable modular and fault-tolerant quantum systems.
- About this position:
You will join Quandela's Semiconductor Optics Team, a multidisciplinary group combining expertise in quantum optics, spin physics, semiconductor technologies, electronics and quantum information.
The team develops the building blocks required for future hybrid spin-photon quantum computing architectures, bridging quantum science, technology development and product-oriented demonstrators.
In this role, you will contribute to the development and validation of photon-mediated spin–spin entanglement protocols while improving the performance of spin-based quantum systems.
Current challenges include enhancing spin coherence against decoherence, validating high-fidelity spin qubit operations, developing advanced optical control techniques and strengthening theory-to-experiment feedback loops for future multi-spin architectures.
Beyond the scientific challenges, you will contribute to building demonstrators that will directly become part of future quantum computing platforms. Success in this role relies on combining scientific rigor, collaboration across Quandelas production and research departments.
- What you'll do:
As a Quantum Optics Scientist, you will contribute to the development of spin-based quantum technologies supporting Quandela's longterm quantum computing roadmap.
Your work will include:
- Design, develop and improve optical experiments involving spin-photon sources.
- Develop and implement optical control schemes for spin initialization, readout and characterization.
- Characterize key spin properties including coherence, operation fidelity and entanglement quality.
- Collaborate with theory, electronics and semiconductor technology teams to improve device performance and accelerate experimental progress.
- Contributing to the development and validation of photon-mediated spin–spin entanglement protocols and future multi-spin architectures.
- Validate and translate scientific advances into robust technological building blocks for future hybrid quantum computing systems.
- How You Will Grow:
During your first 3 months
You will become familiar with Quandela's experimental platforms, spin-control techniques and ongoing demonstrator programs while contributing to existing projects.
Within 6 months
You will take ownership of specific scientific and experimental activities, contribute to protocol development and actively participate in theory-to-experiment feedback loops.
Within 1 year
You will play a key role in advancing distributed entanglement demonstrations, contribute original ideas and help shape future developments within the team.
- Ideal Profile:
- PhD in Spin Physics, Quantum Optics, Spin-Photon interfaces in the solid state or related fields.
- Hands-on experimental research experience in spin physics, quantum optics, semiconductor quantum systems, quantum emitters, or closely related areas.
- Experience developing, optimizing, and troubleshooting experimental quantum systems in a laboratory environment.
- Familiarity with techniques such as spincontrol, optical manipulation, coherence measurements, single-photon characterization or related experimental methods.
- Comfortable working alongside physicists, engineers and theorists in a multidisciplinary environment.
- Curious, collaborative and motivated by challenging scientific and technological problems.
Bonus Points
Experience in one or more of the following areas is highly appreciated:
- Spin-photon interfaces
- Semiconductor quantum emitters and quantum dots
- Ultrafast optics and advanced optical control
- Fast control electronics, cryogenic experimental platforms, and advanced laboratory instrumentation.
If relevant, we encourage you to highlight your level of experience with these topics in your CV, publications or application materials.
- Career Stage & Team Contribution:
We welcome applications from candidates with a PHD in a relevant field, including recent PhD graduates and researchers with up to approximately three years of postodctoral or equivalent R&D experience.
Expereience candidates will take a leading role in shaping technical directions, accelerating key developments, and mentoring younger team members. Strong early-carrer candidates will be suported in developing technical independant though pressive ownership of experimental activities.
Beyond technical expertise, we value curiosity, rigor, collaboration, and a willingness to share knowledge within a multidisciplinary team.
- Profit-sharing and a company savings plan.
- Public transport subscription covered at 50%.
- Annual sustainable mobility bonus for eco-friendly transport (e-bike, electric car).
- Fully covered health insurance (Alan).
- Referral program (€1,000 for a junior and €2,000 for an experienced candidate).
- Access to a nursery via choisir-ma-creche or contribution to childcare expenses.
- Subsidy for gym membership and sports activities (Gymlib).
- Meal subsidies (Swile).
Localisation of the position : Based at the IPVF campus in Palaiseau, within the Paris-Saclay research ecosystem.
Process:
- Talent Acquisition Interview (30' - 45')
- Hiring Manager Interview (45' - 60')
- Reference checks
- Technical discussion and presentation of previous research work
- Meeting with the team and scientific discussion around fault-tolerant quantum algorithms and applications
- Offer
Beyond That:
At Quandela, we value scientific curiosity, experimentation and collaboration. If you're passionate about quantum optics, spin physics and quantum technologies, we'd love to hear from you, even if you don't meet every listed requirement.
If you're excited by the challenge of turning scientific ideas into demonstrations, advancing the building blocks of future quantum computing systems and working alongside physicists, engineers and theorists, let's talk.
TECHNICAL & MARKET ANALYSIS | Appended by Quantum.Jobs
The emergence of specialized Quantum Optics Scientists focusing on spin-based systems marks a crucial translation phase in deep tech from fundamental physics to scalable hardware architectures. As quantum information science transitions across Technology Readiness Levels, the structural integration of spin-photon interfaces provides the missing bridge between localized processing units and distributed quantum networks. Developing high-leverage positions within this domain addresses critical integration bottlenecks, transforming lab-scale phenomena into robust, fault-tolerant computational systems. Verifiable indicators from national technology strategies highlight that establishing predictable validation pathways for solid-state emitters is key to mitigating development risks in hybrid classical-quantum infrastructures. By engineering deterministic protocols to combat spin decoherence, this functional layer stabilizes the application readiness of emerging deep-tech computing platforms globally.
The solid-state quantum value chain is shifting from isolated qubit validation toward integrated, multi-component architectures that rely heavily on complex spin-photon interfaces. While historic challenges centered on basic emitter discovery, the contemporary sector-wide focus lies on bridging classical and quantum capabilities at scale, requiring advanced physical integration to ensure high-fidelity operations. This evolution repositions optical and spin scientists from traditional academic environments into high-impact infrastructure roles, where their findings directly determine hardware manufacturing tolerances and computing platform throughput.
Ecosystem reports from organizations like the QED-C highlight that material-level variances and system decoherence remain primary roadblocks to commercial scalability. Mitigating these issues requires institutionalizing tight feedback loops between cleanroom semiconductor fabrication, cryogenic engineering, and algorithmic system design. Consequently, the role type functions as a central coordination mechanism, translating theoretical physics parameters into actionable engineering requirements for cross-functional hardware teams.
Furthermore, public-private funding cycles are increasingly mandating clear milestones toward modular, fault-tolerant hardware architectures. As global deep-tech scale-ups compete to establish cloud-accessible quantum platforms, the scalability of optical control and read-out subsystems represents a massive competitive advantage. This structural dependency elevates solid-state spin research from a long-term exploratory pursuit into an active catalyst for regional technology ecosystems and global supply chain independence.
The capability architecture for this role type centers on the synchronization of advanced quantum optics protocols with solid-state spin initialization and read-out methodologies. Mastery of cryogenic experimental environments and sub-nanosecond optical control systems is essential for maximizing coherence lifetimes against ambient environmental noise. These specialized protocols form the foundational layer of information transfer, directly impacting the fidelity of photon-mediated entanglement systems.
Developing these capabilities provides essential technical throughput by ensuring that experimental data streams are accurately integrated with automated characterization tools. This high-leverage interface enables researchers to quickly identify systemic device drift and validate multi-spin interactions before scaling production. By establishing rigorous verification routines, this function reduces testing friction, allowing engineering groups to iterate faster on hybrid hardware-software co-design.
These skills are vital for supporting future interoperability across disparate photonic platforms, as they stabilize the basic physical parameters required for cloud-accessible quantum networks. The alignment of fast control electronics with high-precision optical alignment protocols creates a predictable framework for hardware development. Ultimately, this specialized domain ensures that emerging physical hardware elements remain fully compatible with broader industrial computing ecosystems. - Accelerates the deterministic transition of solid-state spin research into scalable quantum computing hardware architectures
- Mitigates architectural development risks by validating photon-mediated spin-spin entanglement protocols within real-world environments
- Facilitates the standardization of experimental characterization routines across multi-disciplinary deep-tech development teams
- Minimizes system iteration cycles through tighter integration between semiconductor fabrication data and experimental physics feedback
- Maximizes spin coherence metrics by implementing advanced optical control schemes designed to suppress ambient noise
- Lowers integration friction between physical spin-photon interfaces and automated cryogenic control systems at scale
- Optimizes capital allocation by providing verifiable performance benchmarks before initiating high-volume hardware fabrication
- Strengthens local deep-tech supply chains through successful validation of scalable semiconductor quantum emitter components
- Stabilizes data transmission rates across emerging modular and distributed fault-tolerant quantum information networks
- Enhances technological readiness progression by systematically converting laboratory breakthroughs into robust computing platform blocks
- Promotes cross-functional engineering alignment by translating complex physical observations into practical manufacturing tolerances
- Directs future hardware-software co-design efforts by establishing clear thresholds for multi-spin system operational fidelityIndustry Tags: Quantum Optics, Spin Physics, Solid-State Qubits, Photonic Architectures, Deep Tech Hardware, Quantum Computing Systems, Cryogenic Engineering, Semiconductor Emitters
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