Research Engineer - Single-Photon Source Fabrication

Quandela stands as a global leader in quantum computing, driven by groundbreaking technology and a strategic vision for scaling quantum solutions. The company’s unique ability to offer both hardware and software solutions, along with its commitment to build energy efficient quantum processing units that scale, positions it to play a key role in the next wave of innovation, and in many strategic and sovereign industrial sectors. 

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.

Join Us at the Forefront of Quantum Computing Innovation  

About this position:

We are seeking a Fabrication Engineer to join our Single-Photon Source Research Team, a multidisciplinary group of scientists and engineers working at the intersection of quantum dot emitters, photonic microcavities, advanced device fabrication, and characterisation.

The team focuses on enhancing the performance of our single-photon sources based on quantum-dots in micropillar cavities, with the goal of generating high-fidelity resource states for photonic quantum computing. By combining spin qubits with highly efficient light–matter interfaces, these devices form a key building block of Quandela’s hybrid spin-photon quantum computing architecture.

In this role, you will contribute to Quandela’s research road-map by advancing micropillar fabrication processes to improve device yield and performance, while also designing and developing next-generation devices. Your work will directly inform the research strategy for future production platforms and drive progress in the development of state-of-the-art single-photon sources.

Current challenges include increasing device brightness beyond the loss-tolerance thresholds required by quantum error-correcting codes, as well as substantially improving fabrication yield to produce large numbers of identical devices that emit mutually indistinguishable photons.

You must possess strong expertise in nano- and microfabrication processes (thin-film deposition, lithography, etching, etc.) and experience with the electrical and optical characterisation of devices. Success in this role depends on scientific rigor, exceptional attention to detail in device fabrication, and the ability to work effectively across teams with diverse technical backgrounds.

Responsibilities:

• Participate in the production of Quandela’s single-photon sources.
• Identify and improve fabrication steps impacting device performance.
• Conceptualise and test new designs for improved SPS brightness and indistinguishability.
• Implement a research road-map and ensure timely delivery of outcomes.
• Systematically document the results and report your findings  (including patents, scientific publications and participation in international conferences).
• Collaborate with the production teams to transfer successful results.

Location:

Based at the IPVF campus in Palaiseau, within the Paris-Saclay research ecosystem.

Ideal profile:

• Master degree or higher in a relevant topic.
• 3 years’ experience (including PhD) in a research laboratory.
• Strong fundamentals in nano- and microfabrication processing techniques.
• Understanding of optical microcavities  and nano-photonics.
• Proven ability to build and run complex experiments from the ground up.
• Software coding using Python or other common languages.
• Team player with an ability to work effectively across multiple projects and departments.
• Ability to work independently.
• Excellent verbal and written communication skills.
• Ability to maintain organized, frequent, and clear reporting.

Bonus points: experience in one or more of the following areas is highly appreciated:

• Quantum emitters
• Design and fabrication of cavity-based single-photon sources
• Advance characterisation of the optical and electrical properties of III-V semiconductor heterostructures
• Fabrication of VCSELS or other integrated laser devices

At Quandela, we value scientific curiosity, experimentation and collaboration. If you're passionate about nano- and microfabrication, single-photon 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 real devices, advancing the building blocks of future quantum computing systems, and working alongside physicists, engineers and theorists, let's talk.

• Competitive salary, flexible based on your experience and expectations

• Profit-sharing & company savings plan
• 100% health coverage (Alan)
• 50% transport reimbursement or sustainable mobility bonus
• Meal vouchers (Swile), Gymlib fitness support
• Childcare assistance & referral bonuses (€1,000–€2,000)

What we offer:

• A meaningful role with real ownership, from day one
• A team eager to collaborate and grow with you
• Daily exposure to the entire quantum stack — from high-level APIs to low-level firmware, and everything in between.
  

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 single-photon source fabrication
• Offer

At Quandela, we believe that the strength of our team is the plurality of experiences, perspectives, and journeys. We are committed to building a respectful, inclusive, and welcoming work environment. All applications are welcome.