Quantum Optics Scientist - Spin-Based Quantum Systems

- About Quandela:

QuandelaisaEuropeandeeptechscale-up buildingmodular, scalable andenergy-efficientphotonicand spin-opticalquantum computers.

Our quantumcomputingplatformisaccessibleboththroughthe cloud and on-premises.

With ateamof morethan140 people,wedevelopourownhardware and software stack,fromsemiconductorquantumemittersandphotonicprocessors to quantum controlsystemsand quantumalgorithms.

Our ambitionistobuildlarge-scalefault-tolerantquantum computers capableofsolvingproblemsbeyondthereachofclassicalcomputationusingQuandela’scutting-edgequantum dottechnology.

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 joinQuandela’sSemiconductor OpticsTeam, a multidisciplinary group combiningexpertisein quantum optics, spin physics, semiconductor technologies,electronicsand 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.

Inthisrole,youwillcontributetothedevelopmentand validation of photon-mediatedspin–spinentanglementprotocolswhileimprovingthe performance of spin-basedquantumsystems.

Current challenges include enhancing spin coherenceagainst decoherence,validatinghigh-fidelityspinqubit operations, developing advanced optical controltechniquesand strengthening theory-to-experiment feedback loops for future multi-spin architectures.

Beyond the scientific challenges, you will contribute tobuildingdemonstratorsthatwill directly becomepart of future quantum computing platforms. Success in this role relies on combining scientific rigor, collaborationacrossQuandelasproduction and researchdepartments.

- 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.

Yourworkwillinclude:

• Design,developandimprove opticalexperimentsinvolvingspin-photon sources .
• Develop and implement optical control schemes for spininitialization,readoutand characterization .
• Characterize keyspinproperties including coherence,operationfidelityandentanglementquality.
• Collaboratewiththeory,electronicsandsemiconductortechnologyteamstoimprovedeviceperformance andaccelerateexperimentalprogress.
• Contributingto thedevelopmentand validation of photon-mediatedspin–spinentanglementprotocols and future multi-spin architectures .
• Validateand translatescientific advances intorobusttechnological building blocks for futurehybridquantum computing systems.

- How You Will Grow:

Duringyourfirst 3months YouwillbecomefamiliarwithQuandela’sexperimentalplatforms, spin-control techniques andongoingdemonstratorprogramswhilecontributingtoexistingprojects.

Within6months Youwilltakeownershipofspecificscientificandexperimentalactivities,contributetoprotocoldevelopmentandactivelyparticipateintheory-to-experimentfeedbackloops.

Within1year Youwillplayakeyroleinadvancingdistributedentanglementdemonstrations,contributeoriginalideasandhelpshapefuturedevelopmentswithintheteam.

Requirements

- Ideal Profile:

• PhD inSpinPhysics, Quantum Optics, Spin-Photon interfaces in the solid stateorrelated fields.
• Hands-on experimental research experience in spin physics, quantum optics, semiconductor quantum systems, quantumemitters,or closely related areas.
• Experience developing,optimizing, and troubleshooting experimental quantum systems in a laboratory environment.
• Familiaritywithtechniquessuchas spincontrol,opticalmanipulation,coherencemeasurements, single-photoncharacterizationorrelatedexperimentalmethods.
• Comfortableworkingalongsidephysicists,engineersandtheoristsin amultidisciplinaryenvironment.
• Curious, collaborative andmotivatedbychallengingscientificandtechnologicalproblems.

Bonus Points

Experiencein one or more of thefollowingareasishighlyappreciated:

• Spin-photon interfaces
• Semiconductorquantumemittersand quantum dots
• Ultrafastopticsandadvancedopticalcontrol
• Fast control electronics, cryogenic experimental platforms, and advanced laboratory instrumentation.

If relevant,weencourageyouto highlightyourlevelofexperiencewiththesetopics inyourCV, publications or applicationmaterials.

- CareerStage & 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 technicalexpertise, we value curiosity, rigor, collaboration, and a willingness to share knowledge within a multidisciplinary team.

Benefits

• Profit-sharinganda companysavings 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 viachoisir-ma-creche or contribution to childcare expenses.
• Subsidy for gym membership and sports activities (Gymlib).
• Meal subsidies (Swile).

Localisationof theposition :Based at the IPVF campus inPalaiseau, within the Paris-Saclay research ecosystem.

Process:

• Talent Acquisition Interview (30’ - 45’)
• Hiring Manager Interview (45’ - 60’)
• Reference checks
• Technical discussion and presentation ofpreviousresearch work
• Meeting with the team and scientific discussion around fault-tolerant quantum algorithms and applications
• Offer

Beyond That: AtQuandela, we value scientific curiosity,experimentationand collaboration. Ifyou’repassionate about quantum optics, spinphysicsand quantum technologies,we’dlove to hear from you, even if youdon’tmeet every listed requirement.

Ifyou’reexcited by the challenge of turning scientific ideas into demonstrations, advancing the building blocks of future quantum computing systems and working alongside physicists,engineersand theorists,let’stalk.