Careers at k&z

Build the infrastructure that makes quantum computing real. Join a team where physics meets production engineering.

Why Work at k&z

k&z is where the frontier of quantum physics meets the discipline of production-grade infrastructure. We are a team of 85 people building the platform that researchers, governments, and enterprises rely on to run quantum workloads at scale. Every role here — from the physicist calibrating qubits to the SRE ensuring 99.99% uptime to the sales director closing sovereign deployment contracts — directly contributes to making quantum computing accessible and reliable.

We are growing fast, but deliberately. We hire people who combine deep expertise with intellectual curiosity, who care about getting the details right, and who want to work on problems that genuinely matter. If you want to be part of the team that builds the infrastructure layer for the quantum era, we would like to hear from you.

Our Culture

We operate with a small number of principles that shape how we work together:

  • Depth over breadth. We prefer people who go deep on hard problems rather than skimming the surface of many. Expertise matters here.
  • Show your work. We document decisions, write clear design docs, and share context generously. Transparency accelerates everything.
  • Own the outcome. Every team member has real ownership of their domain. We do not have layers of approval gates — we have high standards and trust.
  • Question the default. Quantum computing is a new field. Many of the "standard" approaches from classical infrastructure do not apply. We encourage challenging assumptions and proposing novel solutions.
  • Respect the physics. At the end of the day, our platform runs on superconducting circuits cooled to 15 millikelvin. We maintain a deep respect for the physical reality our software orchestrates.

Benefits

  • Competitive compensation — Market-rate salary plus equity in a high-growth quantum infrastructure company.
  • Health and wellness — Comprehensive health, dental, and vision insurance. Mental health support through a dedicated provider. CHF 1,500/year wellness stipend.
  • Flexible work — Hybrid model with 3 days in-office, 2 days remote. Fully remote arrangements considered for exceptional candidates in specific roles.
  • Learning and development — CHF 5,000/year professional development budget for conferences, courses, and certifications. Access to internal quantum computing workshops.
  • Generous leave — 28 days paid vacation (all offices), plus local public holidays. Parental leave: 16 weeks fully paid for all parents.
  • Retirement — Employer-matched pension contributions (Switzerland), 401(k) with 4% match (US), CPF top-up (Singapore).
  • Equipment — Choice of laptop and peripherals, plus a CHF 2,000 home office setup budget for new hires.
  • Relocation support — Visa sponsorship and relocation packages available for roles in Zurich, Virginia, and Singapore.
  • Research publication — We actively encourage publishing research and attending academic conferences on company time.

Open Positions

Quantum Systems Engineer

Zurich, Switzerland · Full-time

Design and implement the control software stack that drives our superconducting QPU processors. You will work directly with quantum hardware, developing pulse-level calibration routines, real-time error correction decoders, and the scheduling layer that allocates qubit resources across multi-tenant workloads. Requires a PhD or equivalent experience in quantum computing, condensed matter physics, or a related field, with strong programming skills in Python and C++. Experience with superconducting qubit control systems (Zurich Instruments, Keysight, or equivalent) is highly desirable.

Infrastructure SRE

Zurich, Switzerland or Reston, VA, USA · Full-time

Ensure the reliability, scalability, and performance of k&z's production infrastructure — from the Kubernetes clusters running our API services to the bare-metal control servers connected to quantum processors. You will build observability tooling, automate incident response, manage capacity planning, and own our 99.99% availability SLA. Requires 5+ years of SRE or DevOps experience at scale, deep expertise in Linux, Kubernetes, and infrastructure-as-code tools (Terraform, Ansible), and strong debugging skills across the full stack. Experience with HPC or scientific computing infrastructure is a plus.

Sales Director — Enterprise

Reston, VA, USA · Full-time

Lead enterprise sales for the Americas region, building relationships with Fortune 500 R&D teams, defense contractors, and government agencies evaluating quantum computing infrastructure. You will manage a complex sales cycle involving technical evaluations, security reviews, procurement processes, and executive stakeholder alignment. Requires 8+ years of enterprise infrastructure sales experience with a track record of closing seven-figure deals, familiarity with government procurement (FAR/DFARS a plus), and the ability to translate deeply technical product capabilities into business value for non-technical executives.

Security Engineer

Zurich, Switzerland or Remote (EU) · Full-time

Protect k&z's quantum infrastructure and customer workloads by designing and implementing security controls across our full stack. You will lead penetration testing, manage our vulnerability disclosure program, architect zero-trust network policies, and drive compliance initiatives (ISO 27001, SOC 2, FedRAMP). Requires 5+ years of security engineering experience, hands-on expertise with cloud security (AWS/GCP), HSM-based key management, and familiarity with compliance frameworks. CISSP, OSCP, or equivalent certifications preferred. Government security clearance eligibility is a significant advantage.

Applied Physicist

Zurich, Switzerland · Full-time

Push the performance boundaries of our quantum processors through experimental research and applied physics. You will design and run experiments to characterize qubit coherence, optimize gate fidelities, develop novel error mitigation techniques, and contribute to our quantum error correction roadmap. This role bridges fundamental research and production — your work will directly improve the quality of results our customers receive. Requires a PhD in experimental quantum physics, superconducting circuits, or quantum information science, with a publication record in relevant journals. Hands-on laboratory experience with dilution refrigerators and microwave measurement equipment is essential.

How to Apply

Send your CV and a brief cover letter explaining why you are interested in k&z to support@kandz.co, referencing the position title in the subject line. We review every application and aim to respond within 5 business days. Our interview process typically includes:

  1. Initial screen — 30-minute video call with a team member to discuss your background and interests.
  2. Technical assessment — A take-home exercise or live technical interview relevant to the role (typically 2–3 hours).
  3. Team interviews — 3–4 sessions with team members and cross-functional stakeholders (half-day, on-site or virtual).
  4. Offer — If we are mutually excited, we extend an offer within one week of the final interview round.

We are committed to building a diverse team and welcome applications from candidates of all backgrounds. If you need accommodations during the interview process, let us know — we are happy to support you.

Ready to Get Started?

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