Careers

Software / Theory · Full-time · Hybrid · Paris, France 

Preferred start date: Early January 2027 

About Qluster 

Qluster is a startup developing continuous-variable photonic quantum computers. By prioritizing architecture-first scalability, our ambition is to turn fundamental research into practical technology for healthcare, chemistry, sustainability and various applications. 

We bring together physicists and engineers who value curiosity, initiative, and teamwork. Progress comes from open discussion, constructive challenges, and shared ownership of complex problems. Joining Qluster means helping shape both our core technology and the way we work. 

Your role and responsibilities 

Lead the development of Qluster’s internal software for continuous-variable measurement-based quantum computing (CV-MBQC). You will connect quantum circuit descriptions, photonic models and experimental constraints, with an initial focus on a validated simulation and circuit-mapping stack. 

• Define the software architecture and development priorities with the systems architect and experimental scientists; provide technical guidance and review scientific code. 

• Develop mappings from supported circuits to resource states, passive optical transformations, measurement sequences and outcome-dependent feed-forward, making encoding assumptions explicit. 

• Implement and validate the gates, state preparations and measurement models required by the selected architecture, including relevant loss and noise processes. 

• Choose numerical representations suited to Gaussian and non-Gaussian problems; quantify approximation errors, computational cost and the limits of each simulation. 

• Build representative circuit benchmarks, automated tests, documentation and reproducible workflows; compare results with analytical references and experimental data. 

• Maintain clear interfaces between simulation, compilation and hardware models, and evolve the stack as architectural choices and research priorities develop. 

Basic qualifications and experience 

• Master’s degree or PhD in physics, computer science, applied mathematics or a related field, or equivalent relevant experience. 

• Strong Python and numerical computing skills, with experience developing scientific software used by other researchers or engineers. 

• Solid understanding of quantum circuits and quantum measurement, with research or development experience in quantum simulation. 

• Experience with version control, automated testing, code review and maintainable software design. 

• Demonstrated ability to guide technical decisions, break open-ended problems into deliverable work and communicate modelling limitations. 

• Collaborative working style, constructive feedback, and clear written and spoken scientific communication in English. 

Preferred qualifications and experience 

• Experience with CV quantum optics, cluster states, MBQC or bosonic encodings such as GKP codes. 

• Experience with quantum compilation, adaptive measurements or interfaces between quantum algorithms and physical implementations. 

• Familiarity with Fock-space methods, phase-space methods, tensor networks or stochastic simulation. 

• Performance optimisation using compiled languages, GPUs or parallel computing; experience mentoring scientific software contributors. 

What we offer 

• Compensation: Salary package tailored to your experience and profile. 

• Workplace flexibility: Hybrid work organization based in Paris. 

• Benefits: Health insurance (50% employer-funded) and 50% public transportation reimbursement. 

• Growth potential: As an early-stage startup, our employee benefits and workplace perks will expand and evolve alongside the growth and maturity of the company. 

Don’t hesitate to apply if you don’t meet 100% of the criteria. We care deeply about potential, diverse perspectives, and motivation. Tell us what drives you and how you see yourself contributing to Qluster. 

We are committed to an inclusive and accessible recruitment process and workplace. Should you need any accommodations at any stage, please let us know. 

Theory / Software · Full-time · Hybrid · Paris, France 

Preferred start date: Early January 2027 

About Qluster 

Qluster is a startup developing continuous-variable photonic quantum computers. By prioritizing architecture-first scalability, our ambition is to turn fundamental research into practical technology for healthcare, chemistry, sustainability and various applications. 

We bring together physicists and engineers who value curiosity, initiative, and teamwork. Progress comes from open discussion, constructive challenges, and shared ownership of complex problems. Joining Qluster means helping shape both our core technology and the way we work. 

Your role and responsibilities 

You will develop the error-correction models and decoding tools that guide the design of Qluster’s photonic quantum computer. Working closely with the CTO, Scientific Advisor, Photonic Quantum Architect and hardware team, you will connect physical noise, code selection and decoder performance to practical architecture requirements. 

Your responsibilities will include: 

• Evaluate candidate bosonic encodings and their integration with outer quantum error-correcting codes, identifying trade-offs between logical performance, resource requirements and implementation constraints. 

• Develop and benchmark decoding algorithms, including approaches that exploit analog measurement information and account for correlated errors where relevant. 

• Build physical-to-logical noise models incorporating realistic photonic imperfections, such as optical loss, finite squeezing, imperfect resource states and measurement noise. 

• Develop a documented, reproducible simulation toolchain for code comparison, decoder benchmarking and logical error-rate estimation. 

• Validate models and implementations against reference cases, quantify statistical uncertainty and assess performance across relevant hardware parameter ranges. 

• Assess decoder runtime and computational requirements, supporting efficient design iteration and informing future latency and throughput requirements. 

• Translate simulation results into recommendations for hardware performance targets, architecture choices and demonstrator specifications. 

• Contribute to technical reports and architecture reviews, communicating assumptions, limitations and trade-offs clearly as the technology develops. 

Basic qualifications and experience 

• A PhD in physics, mathematics, computer science, electrical engineering or a related discipline, or a master’s degree with equivalent relevant research or development experience. 

• Solid understanding of quantum error correction, including stabilizer codes, syndrome extraction, logical errors and the principles of fault tolerance. 

• Demonstrated experience implementing and evaluating decoding algorithms for classical or quantum error-correcting codes. 

• Strong scientific programming skills in Python or a comparable language, with experience developing readable, tested and documented code. 

• Experience with numerical simulation, probabilistic modelling and statistical analysis of computational results. 

• Ability to work independently on open-ended problems, identify priorities and adapt to evolving technical requirements. 

• A collaborative approach, intellectual curiosity and the ability to explain technical findings clearly to colleagues from different disciplines. 

• Clear written and spoken English. 

Candidates whose main experience is in classical error correction are welcome, provided they can demonstrate the quantum error-correction foundations required for this role. 

Preferred qualifications and experience 

• Experience with continuous-variable quantum information, bosonic codes—particularly Gottesman–Kitaev–Preskill (GKP) codes—and analog or soft-information decoding. 

• Experience with surface or toric codes, quantum LDPC codes, or concatenated error-correction schemes. 

• Familiarity with decoding methods such as belief propagation and its variants, ordered-statistics decoding, minimum-weight perfect matching or union-find. 

• Knowledge of photonic quantum computing, cluster states and measurement-based quantum computation. 

• Experience with QEC simulation and decoding tools such as plaquette from QC Design, Stim or PyMatching, including understanding their modelling assumptions and limitations. 

• Experience with performance profiling, parallel computing or compiled languages such as C++. 

• Experience collaborating with experimental or hardware teams to translate device characteristics into noise models and engineering requirements. 

What we offer 

• Compensation: Salary package tailored to your experience and profile. 

• Workplace flexibility: Hybrid work organization based in Paris. 

• Benefits: Health insurance (50% employer-funded) and 50% public transportation reimbursement. 

• Growth potential: As an early-stage startup, our employee benefits and workplace perks will expand and evolve alongside the growth and maturity of the company. 

Don’t hesitate to apply if you don’t meet 100% of the criteria. We care deeply about potential, diverse perspectives, and motivation. Tell us what drives you and how you see yourself contributing to Qluster. 

We are committed to an inclusive and accessible recruitment process and workplace. Should you need any accommodations at any stage, please let us know. 

Hardware | Full-time · Hybrid | Paris, France 

Target start date: Early January 2027 

About Qluster 

Qluster is a startup developing continuous-variable photonic quantum computers. By prioritizing architecture-first scalability, our ambition is to turn fundamental research into practical technology for healthcare, chemistry, sustainability and various applications. 

We bring together physicists and engineers who value curiosity, initiative, and teamwork. Progress comes from open discussion, constructive challenges, and shared ownership of complex problems. Joining Qluster means helping shape both our core technology and the way we work. 

Your role and responsibilities 

As our Senior FPGA & Electronics Engineer, you will lead the development of the electronic control and acquisition systems supporting our photonic quantum computing platform. Working closely with quantum scientists, optical engineers and software developers, you will help turn laboratory experiments into compact, reliable and reproducible systems. 

Your work will support both our quantum computing roadmap and experimental Quantum Reservoir Computing demonstrators. 

• Define electronic architectures: translate experimental needs into specifications for acquisition, processing, timing, noise and interfaces; assess design options and select suitable components. 

• Develop FPGA firmware: design, simulate, implement and validate logic for real-time data acquisition, digital signal processing, synchronization and low-latency control. 

• Develop detection electronics: work with the photonics team to design and characterize low-noise balanced photodetectors for pulsed homodyne detection, including analogue front ends and digitization. 

• Enable fast optical control: develop electronics and FPGA interfaces for modulators and optical switches, supporting a target optical pulse repetition rate of 100 MHz and the associated timing requirements. 

• Integrate and miniaturize prototypes: design and bring up electronic boards, integrate ADCs/DACs and clock distribution, and help replace laboratory instrumentation with dedicated electronic modules. 

• Validate performance: build automated tests and calibration routines; measure noise, bandwidth, latency, timing jitter and stability; troubleshoot issues across electronics, firmware and optical interfaces. 

• Connect hardware and software: develop acquisition and control interfaces with the software team, supporting reproducible experiments, performance benchmarks and future remote operation. 

• Provide technical ownership: document designs, lead reviews, support colleagues and coordinate relevant suppliers, procurement and component choices within project budgets and schedules. 

This role combines development work with hands-on laboratory integration. Hybrid working is arranged around experimental and team needs, with regular on-site presence in Paris. 

Basic qualifications and experience 

• A degree in electronic engineering, electrical engineering, embedded systems or a related field, or equivalent practical experience. 

• At least five years of relevant experience in FPGA development and electronic systems, with demonstrated ownership from specifications through laboratory validation. 

• Strong proficiency in VHDL, Verilog or SystemVerilog, including simulation, synthesis, timing constraints, timing closure and clock-domain crossings. 

• Hands-on experience integrating FPGA-based systems with ADCs/DACs, hardware interfaces and host software. 

• Solid understanding of analogue and digital electronics, including low-noise design principles, signal integrity, grounding and PCB design or review. 

• Experience bringing up and debugging hardware using oscilloscopes, logic analysers and other laboratory instruments. 

• Practical Python skills for test automation, instrument control or data analysis, alongside disciplined version control and technical documentation. 

• A systematic approach to problem-solving, autonomy in managing priorities and the ability to make clear engineering trade-offs. 

• Strong communication and collaboration skills, including the ability to explain technical constraints across disciplines, welcome feedback and share knowledge. 

• Professional working proficiency in English. 

Preferred qualifications and experience 

• Experience with balanced photodetection, transimpedance amplifiers, pulsed optical measurements or shot-noise characterization. 

• Experience in photonics, quantum technologies, scientific instrumentation or other demanding experimental environments. 

• Familiarity with high-speed converters, low-jitter clocking, RF electronics and interfaces such as JESD204, LVDS, PCIe or Ethernet. 

• Experience with FPGA SoCs, embedded Linux, C/C++ or hardware/software co-design. 

• Experience implementing real-time filtering, feedback or feedforward, with explicit latency and throughput constraints. 

• Experience reducing the size and complexity of laboratory systems through custom electronics, with attention to manufacturability, testability and maintainability. 

• Experience mentoring engineers, coordinating suppliers or delivering hardware in a startup or R&D environment. 

What we offer 

• Compensation: Salary package tailored to your experience and profile. 

• Workplace flexibility: Hybrid work organization based in Paris. 

• Benefits: Health insurance (50% employer-funded) and 50% public transportation reimbursement. 

• Growth potential: As an early-stage startup, our employee benefits and workplace perks will expand and evolve alongside the growth and maturity of the company. 

Don’t hesitate to apply if you don’t meet 100% of the criteria. We care deeply about potential, diverse perspectives, and motivation. Tell us what drives you and how you see yourself contributing to Qluster. 

We are committed to an inclusive and accessible recruitment process and workplace. Should you need any accommodations at any stage, please let us know.