Cloud Engineer - Quantum Computing (m/w/d)

s based on trapped-ion technology. Quantum computing is a new computing paradigm rapidly approaching commercial viability. Our unique approach combines laser-cooled trapped ions with microwave control and tailored magnetic fields. Our next-generation computing machines under development will be able to find solutions to problems that are out of reach today, thus enabling new innovative products and services for a brighter future. We are looking for a Cloud Engineer (m/f/d) to join us in Hamburg or Siegen and build and operate the scalable, secure cloud platform that connects users with our trapped-ion quantum computers. Responsibilities You will join our Quantum firmware Team as a Cloud Engineer. You will build the layer through which the world reaches our quantum computers. Users submit quantum programs; your services compile, , and dispatch them to our machines and return the results: Build and operate the cloud services that let users submit quantum programs to our systems and retrieve their results.Develop and deploy our compilation pipeline as a scalable cloud service , from circuit input through transpilation down to hardware-level instructionsDesign and maintain the public API and SDK entry points to our platformImplement job queuing, scheduling, and dispatch towards the hardware backends, including quota, prioritisation, and result handlingOwn authentication and authorisation across the platform: user and tenant identity, API keys and tokens, and role-based access to machines, jobs, and results, built on an established identity provider rather than from scratchGuarantee tenant isolation, so that quantum programs and results are never visible across customer boundaries, and manage secrets and credentials across the stackWork with the quantum firmware and hardware teams on the interfaces between cloud services and the machine itselfInstrument the platform for observability and keep an eye on latency, throughput, and cost Required Skills: 3+ years of hands-on experience building and deploying backend or platform services in productionStrong Python; additional systems-level language experience (Go, Rust, C++) is welcomeSolid API design skills (REST and/or gRPC) for services other developers have to usePractical experience implementing authentication and authorisation in production systems: OAuth 2.0 / OpenID Connect, token handling, and role-based access controlSecure engineering habits: least privilege by default, proper secrets management, and awareness of dependency and container supply-chain risksInfrastructure as code (Terraform, Pulumi, or similar) and CI/CD pipelines (GitLab CI, GitHub Actions, or similar)Working understanding of GDPR and data residency requirements, and a genuine interest in digital sovereigntyAbility to collaborate effectively with experimental physicists and engineersStrong adaptability and a quick learning mindsetGood proficiency in English (written and spoken); German is an advantage for working with public-sector partners Nice to have (Bonus) Running an identity provider in production (Keycloak, Zitadel, Ory, Authentik, or a managed IAM service)Multi-tenant isolation patterns in SaaS platformsContributing to security certification work (ISO 27001, BSI IT-Grundschutz, BSI C5) or acting on penetration test findingsFamiliarity with quantum SDKs and toolchains (Qiskit, Cirq, PennyLane, QIR) or hardware abstraction interfaces such as QDMIBatch scheduling or HPC environments (Slurm or similar)Observability stacks such as Prometheus, Grafana, or OpenTelemetryPrior exposure to quantum computing or other deep-tech domains What you can expect from eleQtron: Competitive salary: We value our team members and therefore provide remunerations that reflect this, additionally rewarding achievementsFlexible working hours: We offer personal freedom through a variety of flexible work schedulesTeam spirit: In our international and diverse team, and with our regular team events, having fun at work is simply part of the cultureFurther development: We want to grow together and so we offer our team members needs-based, individualized further training as well as plenty of room for personal developmentWellness Package: We offer health-promoting benefits such as fitness programs like UrbanSportsClub to support your well-beingBike Leasing: Stay Mobile and Sustainable with Our Company Bike Leasing ProgramMoving Benefits A warm welcome! We are happy to support employees who move for us with a bonus At the forefront: Work at the forefront of technology, where academic research meets commercial applicationsModern workplace: We have a high-quality infrastructure with laboratory space, offices and meeting rooms Skills: Quantum Firmware