Expert Quantum Physicist

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 250+ brilliant minds from over 35 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!

We're looking for an experienced physicist to own the numerical simulation strategy for our superconducting qubits — setting direction, defining what counts as a trustworthy result, and identifying where our methods need to improve. This is a broad-expertise role spanning quantum physics, microwave engineering, and numerical methods: you don't need to be the top expert in each, but a deep understanding of each domain and how they intersect is required.

About the role

As technical lead for numerical simulation of superconducting qubits, you'll own how Alice & Bob predicts and validates device behavior before it reaches the lab. You'll define our simulation approach — from microwave design to qubit dynamics — and set the bar for when a result can be trusted. Where our methods fall short, you'll spot it and drive the fix. You're not executing someone else's roadmap; you're setting it, working closely with the physicists and engineers in the details.

About you

You have several years of experience beyond your PhD, with expertise spanning across quantum physics, microwave engineering, and numerical methods. You're comfortable challenging a result that doesn't hold up, backed by rigor rather than instinct, and you're motivated by owning a technical direction, not just contributing to one.

Own the predictive performance of our simulation stack end to end — accuracy, reliability, and efficiency from device physics through numerical implementation.

Set the standard for what "trustworthy" means across microwave, quantum, and numerical simulations — defining accuracy, convergence, and validation practices, and leading the theoretical justification of our tools and methods.

Find and fix what's holding the stack back, whether the bottleneck is performance, robustness, or model fidelity.

Shape the roadmap for our simulation tools, working closely with domain experts across the company.

Close the loop with experiment — validating simulations against measured device performance alongside experimentalists.

Be the go-to authority on simulation methodology across the team.

Hands-on experience with HPC or large-scale simulations.

Publications in circuit QED or computational electromagnetics.

Hands-on experience in experimental research, providing a practical sense of how quantum devices behave in the lab — beyond what models predict.

Screening Call with Grace, Talent Acquisition Specialist (30 min)

Hiring Manager Interview with Mattis (45 min)

Technical Presentation with the Team (60 min)

Leadership Team Interview (45 min)

Fit Interview (45 min)

Reference check