70 jobs
Join the Runtime Software team to build the real-time control system that turns quantum hardware into a working computer. You'll develop Rust libraries and abstractions over real-time control devices, driving ions with nanosecond precision, and work closely with experimental scientists and compiler teams.
Rust
Join the Runtime Software team to build the real-time control system that turns a collection of hardware into a quantum computer. You'll develop Rust libraries and execution environments, write drivers for real-time devices, and work closely with experimental scientists, FPGA and compiler teams to drive ions with nanosecond precision.
Rust · FPGA · Linux
Oxford Ionics · 51–200 people · Series B
Hands-on staff engineering role building the control plane that schedules and prioritises quantum programs, arbitrates exclusive hardware access, streams results and records everything that ran across a fleet of trapped-ion quantum computers. Work spans Rust services, PostgreSQL persistence, crash recovery and scheduling frameworks, with deep diagnosis of live-system failures.
Rust · gRPC · REST +6
Quantum Dice
Customer-facing technical role translating defence and national security challenges into mathematical models, building prototypes on simulators, software stacks and probabilistic hardware. Applies optimisation, probabilistic inference and AI methods such as QUBO, Ising models and Bayesian networks, benchmarking against classical solvers, CPUs and GPUs. Leads projects from requirements capture to pilot within defence constraints including security classification and export control.
CPUs · GPUs
Quantinuum · 201–500 people · Series B
Leads engineering teams building core quantum languages, compilers and toolkits such as Selene, TKET, HUGR and Guppy, balancing people management with technical roadmap execution. Stays hands-on through design discussions, architectural reviews and code problem-solving, and guides tooling from research prototypes to production-grade software. Collaborates with hardware, theory and product teams across global sites, with occasional international travel.
Selene · TKET · HUGR +1
Universal Quantum · 51–200 people · Series A
Develop, integrate and test software that operates quantum computing hardware, including benchmarking, profiling and optimising quantum processes and algorithms. Work within a multidisciplinary team of electronic engineers, physicists and hardware designers, taking ownership of major features in the quantum computing software stack.
Builds and maintains data-intensive Python backend services for Rigetti's internal software team, supporting quantum engineers and fab engineers with measurement, characterization and fabrication tooling. Work spans schema migrations, testing, CI, performance and observability, plus frameworks that let scientists use AI coding agents safely. Small senior team, no quantum background required.
AWS · Kubernetes · Kafka +2
Infleqtion · 51–200 people · Public
Designs, analyses and implements fault-tolerant architectures for scalable quantum computation, developing error-correcting codes, decoders and fault-tolerant gate constructions tailored to neutral atom hardware. Works with hardware, control and compiler teams to model noise, optimise syndrome extraction and define logical performance metrics, bridging QEC theory and experimental implementation.
Infleqtion · 51–200 people · Public
Designs, implements and optimises quantum algorithms for simulation, optimisation and hybrid quantum-classical workloads, working with hardware, control and research teams to turn theory into executable applications. Deploys software optimisations to the Superstaq cloud platform using industry-grade engineering practices, supports customers, and contributes to research publications and commercial proposals.
Superstaq
PQShield · 51–200 people · Series B
Lead a cryptographic software IP team, owning the full development lifecycle from architecture and planning to testing and customer delivery. Combines hands-on embedded C expertise with line management, hiring, mentoring and cross-team strategy, working on post-quantum cryptography and RISC-V with hardware and vulnerability teams.
GitLab CI · NIST PQC · RISC-V +1
KO2 Embedded Recruitment Solutions
A technical leadership role in an established backend team building Modern C++ (C++17) software on Debian Linux that controls scientific instruments, coordinating pumps, valves, sensors and gauges. You own APIs used by the web GUI and customer scripts, write Python automated tests, run design reviews, and mentor less experienced engineers while working with scientists and product managers.
Debian Linux · WAMP · Modbus +5
PQShield · 51–200 people · Series B
Owns the product roadmap for software-based security IPs, cryptographic libraries and firmware, defining how security software integrates with hardware IPs and SoC architectures. Acts as domain expert on classical and post-quantum cryptography, hardening products against side-channel, DPA and timing attacks, and authoring PRDs that translate crypto standards into engineering requirements. Works directly with founders and customers in a deep-tech semiconductor context.
RISC-V · Arm · x86 +5
Quantinuum · 201–500 people · Series B
Maintain and extend a Rust-based quantum compiler codebase, implementing optimisations for quantum-classical programs and new language features. Work across the full development lifecycle with a small team on the TKET compiler and Guppy language, at the intersection of compiler design and quantum computing research.
TKET · Guppy · LLVM +1
Pasqal
Develops and benchmarks quantum error-correcting codes and fault-tolerant protocols tailored to neutral-atom hardware, including decoder design, logical error models and error budgets. Builds and maintains QEC simulation and emulation tools, analyses experimental data, and provides QEC-driven inputs to future QPU architecture design. Involves writing technical reports and scientific articles and representing the company at international conferences.
Python
Universal Quantum · 51–200 people · Series A
Take technical ownership of systems engineering for complex quantum computing systems, from requirements definition through integration, verification and deployment. Work across electronic, mechanical, cryogenic, vacuum, optical, software and control domains, applying MBSE, traceability and configuration control while driving technical risks and trade-offs to resolution with cross-functional teams.
