Alice & Bob is developing the first universal, fault-tolerant quantum computer to solve the world’s hardest problems.
The quantum computer we envision building is based on a new kind of superconducting qubit: the Schrödinger cat qubit 🐈⬛. In comparison to other superconducting platforms, cat qubits have the astonishing ability to implement quantum error correction autonomously!
We're a diverse team of 140+ brilliant minds from over 20 countries united by a single goal: to revolutionise computing with a practical fault-tolerant quantum machine. Are you ready to take on unprecedented challenges and contribute to revolutionising technology? Join us, and let's shape the future of quantum computing together!
The Cloud team empowers quantum hardware with software, creating tools for users. We seek a Senior Software Engineer to architect, mentor, and lead product delivery.
As a Senior Software Engineer, you'll design, build, and deploy full-stack apps for quantum hardware access. You'll contribute to technical decisions, mentor juniors, and shape our application architecture.
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Responsabilities:
- Design and implement new services and APIs in Python (FastAPI)
- Contribute to and maintain our React-based frontend applications (SPAs)
- Work on internal tools that enable teams to monitor and interact with our quantum chips
- Collaborate with low-level software engineers to expose hardware functionality through higher-level interfaces
- Facilitate code reviews and guide junior team members
- Define and enforce best practices in architecture, testing, deployment, and monitoring
- Help improve our CI/CD pipeline and deployment process (GitLab CI, Ansible, Docker/Podman)
- Contribute to deployment and infrastructure decisions for both on-prem and cloud (GCP, OVH) environments
- Participate in sprint planning, design discussions, and roadmap definition
Requirements:
- Experienced: 3+ years of experience as a software engineer in a cloud environment
- Proficient in Python: Strong backend experience, with a good grasp of modern Python, FastAPI or similar frameworks, and asynchronous programming
- Frontend-Capable: Comfortable with React (or similar frameworks) and understand how to build and maintain SPAs
- DevOps-Minded: Experience working with containers (Docker/Podman), CI/CD workflows, and infrastructure tools like Ansible
- Infrastructure-Aware: Familiar with modern deployment environments, including Kubernetes (on-prem or in the cloud) and VM-based setups
- Collaborative Leader: Able to mentor others, lead by example, support a growing team, and help apply best practices
- Product-Focused: You understand user needs and care about delivering useful, maintainable, and well-documented software
We're Also Looking For:
- Experience working in high-performance computing, hardware control systems, or quantum/physics-driven and product-driven environments
- Contributions to open-source projects
- Familiarity with GitLab (projects, issues, CI/CD)
- Understanding of authentication and user access control (OAuth2, Keycloak, etc.)
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Benefits:
- Our success is your success : own it with our BSPCE plan
- Direct IP Compensation: Earn substantial bonuses for driving the core patents that define our quantum architecture.
- Flexible remote policy, up to 40 % a month
- A Parental plan including additional benefits such as crèche support or additional days-off to take care of under 12 years old children
- Subsidized membership withUrban Sports Club
- Mental health support with moka.care
- 25-day vacation policy (as per French law) + RTT
- Half of transportation cost coverage (as per French law), or yearly allowance for the die-hard bicycle users
- Competitive health coverage, with Alan.
- Meal vouchers with Swile, as well as access to a fully equipped and regularly stocked kitchen
- French language courses covered by the company for those interested
Research shows that women might feel hesitant to apply for this job if they don't match 100% of the job requirements listed. This list is a guide, and we'd love to receive your application even if you think you're only a partial match. We are looking to build teams that innovate, not just tick boxes on a job spec.
You will join of one of the most innovative startups in France at an early stage, to be part of a passionate and friendly team on its mission to build the first universal quantum computer!
We love to share and learn from one another, so you will be certain to innovate, develop new ideas, and have the space to grow.
TECHNICAL & MARKET ANALYSIS | Appended by Quantum.Jobs
The function of a Senior Software Engineer in the quantum computing domain is structurally necessary to translate experimental quantum hardware capability into commercially accessible and repeatable service offerings. This critical role exists at the nexus of low-level quantum control and high-level enterprise cloud infrastructure, directly addressing the Technology Readiness Level (TRL) gap inherent in deploying nascent quantum processors. By institutionalizing robust software delivery pipelines and developing reliable Application Programming Interfaces (APIs), this position enables seamless remote access, monitoring, and orchestration of highly sensitive quantum resources, thereby accelerating user adoption and commercialization pathways across the sector. Current industry focus lies on bridging classical and quantum capabilities at scale.-----The quantum software layer represents a pivotal segment of the quantum computing value chain, mediating the complex communication between application developers and specialized quantum processing units (QPUs). The maturity of this layer is a key determinant of market viability, particularly for platforms emphasizing advanced error correction techniques, such as those pioneered by Alice & Bob. Talent scarcity in full-stack, cloud-native engineering capable of operating at the intersection of deep-tech physics and scalable enterprise architecture remains a primary constraint on industry growth.
The ecosystem is actively navigating challenges related to hardware heterogeneity and vendor-specific tooling. A senior cloud software engineering function is essential for mitigating this friction by developing robust, abstracted interfaces that standardize user interactions, irrespective of the underlying physical control system. This standardization is critical for promoting algorithm portability and reducing the total cost of ownership for early enterprise adopters.
Deployment models, encompassing both dedicated on-premise infrastructure for hardware control and public cloud environments for user access, introduce substantial complexity. Establishing secure, efficient, and monitorable hybrid cloud architectures is a non-negotiable requirement for ensuring system uptime, managing sensitive qubit state data, and delivering scalable computational services. These architecture decisions directly influence the speed at which quantum resources can be utilized for benchmarking and commercial application development. The industry prioritizes dependable cloud architecture to foster trust and accelerate industrial scale-up.-----Cloud software architecture in this context centers on creating resilient, multi-modal systems that expose cryogenic hardware functionality via scalable web services. Proficiency in backend frameworks (like Python-based APIs) is leveraged for low-latency communication with control systems and robust state management. This is coupled with front-end single-page applications (SPAs) designed for complex data visualization and real-time monitoring of quantum states and error metrics, crucial for debugging and optimization.
The integration architecture fundamentally relies on modern DevOps principles to manage the highly iterative development cycles characteristic of quantum hardware refinement. Utilizing containerization (Docker, Podman) ensures environmental consistency across development, testing, and deployment phases. Continuous integration and continuous delivery (CI/CD) pipelines are strategically implemented to automate the secure deployment of control software and user interfaces across both private (on-prem) and public cloud (GCP, OVH) environments, maximizing engineering throughput and minimizing time-to-market for new platform features.-----Accelerates the standardization of access protocols for proprietary quantum hardware.
Reduces integration friction for external developers leveraging QPU resources over the cloud.
Ensures the architectural integrity and deployment reliability of hybrid quantum-classical services.
Establishes scalable monitoring and telemetry pipelines for real-time hardware performance assessment.
Facilitates secure, authenticated user access to sensitive quantum computing environments.
Drives the maturation of the software tooling layer essential for large-scale error correction research.
Enhances system throughput and resource efficiency through optimized workload orchestration.
Supports workforce capability development by mentoring junior engineers in critical deep-tech software roles.
Shapes product roadmaps by translating user-reported platform friction into architectural improvements.
Mitigates operational risk inherent in deploying experimental hardware within production cloud environments.
Improves data management frameworks necessary for processing high-volume quantum experiment outputs.
Contributes to the overall commercial readiness level of fault-tolerant quantum computing systems.-----Industry Tags: Quantum Software Engineering, Cloud Architecture, Fault-Tolerant Quantum Computing, Superconducting Qubit, DevOps, Full-Stack Development, Quantum Error Correction, QPU Access Layer, Hybrid Cloud.
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