# Cloud Engineer - Quantum Computing (f/m/d) at eleQtron > Open job at eleQtron in Siegen, Hamburg, Germany. Workplace: On-site. Source: Germany Dev Jobs, https://germanydevjobs.com/jobs/eleqtron-cloud-engineer-quantum-computing-m-w-d-dfyq4d9 Posted 25 September 2026. Last checked on the employer's career site: 10 November 2026. ## Facts - Company: [eleQtron](https://germanydevjobs.com/companies/eleqtron) - Location: Siegen, Hamburg, Germany - Workplace: On-site - Employment type: Full-time - German: Not required - English: Fluent - Skills: C++, GitHub Actions, GitLab CI, Go, Grafana, Prometheus, Python, Rust, Terraform, gRPC - Not mentioned in the job post: salary, visa sponsorship, relocation, where you can apply from ## Job description **eleQtron** develops and operates full-stack quantum computers 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, schedule, 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 instructions - Design and maintain the public API and SDK entry points to our platform - Implement job queuing, scheduling, and dispatch towards the hardware backends, including quota, prioritisation, and result handling - Own 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 scratch - Guarantee tenant isolation, so that quantum programs and results are never visible across customer boundaries, and manage secrets and credentials across the stack - Work with the quantum firmware and hardware teams on the interfaces between cloud services and the machine itself - Instrument 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 production - Strong Python; additional systems-level language experience (Go, Rust, C++) is welcome - Solid API design skills (REST and/or gRPC) for services other developers have to use - Practical experience implementing authentication and authorisation in production systems: OAuth 2.0 / OpenID Connect, token handling, and role-based access control - Secure engineering habits: least privilege by default, proper secrets management, and awareness of dependency and container supply-chain risks - Infrastructure 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 sovereignty - Ability to collaborate effectively with experimental physicists and engineers - Strong adaptability and a quick learning mindset - Good 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 platforms - Contributing to security certification work (ISO 27001, BSI IT-Grundschutz, BSI C5) or acting on penetration test findings - Familiarity with quantum SDKs and toolchains (Qiskit, Cirq, PennyLane, QIR) or hardware abstraction interfaces such as QDMI - Batch scheduling or HPC environments (Slurm or similar) - Observability stacks such as Prometheus, Grafana, or OpenTelemetry - Prior 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 achievements - **Flexible working hours**: We offer personal freedom through a variety of flexible work schedules - **Team spirit:** In our international and diverse team, and with our regular team events, having fun at work is simply part of the culture - **Further 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 development - **Wellness Package**: We offer health-promoting benefits such as fitness programs like UrbanSportsClub to support your well-being - **Bike Leasing:** Stay Mobile and Sustainable with Our Company Bike Leasing Program - **Moving 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 applications - **Modern workplace:** We have a high-quality infrastructure with laboratory space, offices and meeting rooms ## How to apply Apply on the job page, https://germanydevjobs.com/jobs/eleqtron-cloud-engineer-quantum-computing-m-w-d-dfyq4d9: its Apply button opens the employer's own application page. ## More jobs from eleQtron - [QPU Integration Engineer (Assembly & Characterization focused) (f/m/d)](https://germanydevjobs.com/jobs/eleqtron-qpu-integration-engineer-assembly-characterization-focused-f-0xgo9sw): eleQtron, Hamburg, Germany. On-site. Posted 2 November 2026. - [QPU Integration Engineer (Micro-Fabrication focused) (f/m/d)](https://germanydevjobs.com/jobs/eleqtron-qpu-integration-engineer-micro-fabrication-focused-f-m-d-nwa43ib): eleQtron, Hamburg, Germany. On-site. Posted 2 November 2026. - [RF Application Engineer (f/m/d)](https://germanydevjobs.com/jobs/eleqtron-rf-application-engineer-f-m-d-3mf1nta): eleQtron, Siegen, Germany. On-site. Posted 2 November 2026. - [IT Systems & Platform Engineer (f/m/d)](https://germanydevjobs.com/jobs/eleqtron-it-systems-platform-engineer-f-m-d-as5dp0m): eleQtron, Siegen, Germany. On-site. Posted 1 October 2026. - [Compiler Engineer (f/m/d)](https://germanydevjobs.com/jobs/eleqtron-compiler-engineer-f-m-d-l3ucp7h): eleQtron, Siegen, Germany. On-site. Posted 22 September 2026.