Xanadu’s mission is to build quantum computers that are useful and available to people everywhere. Few people in their life will be able to be a part of something like this, where if we are successful, the technologies we develop will solve some of the world’s most challenging problems, and literally change the world. Building a high-performance software stack that makes optimal use of quantum hardware resources is key to realizing early, game-changing applications of quantum computing.

As part of the PennyLane Performance Team, you will be responsible for the performance monitoring and benchmarking tooling for the PennyLane & Catalyst quantum software stack, as well as developing high-performance extensions including the PennyLane-Lightning simulator suite, ensuring PennyLane is the highest-performing framework for quantum computing. Develop the framework for benchmarking the compilation and execution pipeline, tracking quantum resources through the stack, and profiling the quantum software. Develop high-performance software components, adapting to new hardware platforms and programming paradigms.

Convert abstract descriptions of algorithms into efficient & understandable software implementations. Participate in software system specification, design, and quality assurance (e.g., requirements gathering, defining software architecture, documentation, verification & validation, etc.). Provide leadership in software best practices, including continuous-integration pipelines, unit testing, & code review.

BSc in Computer Science, Engineering, Physics, Math, or a related field.



Demonstrated education or training in quantum computing. Proficiency in high-performance Modern C++ (C++17/20 preferred) and Python.

Deep understanding of computer architecture (CPU, GPU, memory hierarchy) coupled with hands-on experience in optimizing code for runtime and memory efficiency using professional profiling tools (e.g. perf, scalene, valgrind). MSc, PhD in Computer Science, Engineering, Physics, Math, or a related field.

Experience with writing complex quantum workflows and optimizing the use of quantum resources. OpenMP, C++ threads), multiprocessing (e.g., Experience in low-level systems programming (e.g. direct memory management, low-latency communication, heterogeneous hardware peripherals) Experience in designing and implementing scalable & reproducible scientific workloads on HPC / supercomputer platforms or cloud hardware (e.g., AWS, Azure, GCP). They are fundamental and lay the foundation for culture at Xanadu.

The base salary range is 120,000 - 160,000 CAD. You will also be eligible for equity and benefits. They are fundamental and lay the foundation for culture at Xanadu. We are committed to building an inclusive, protected, and equitable culture and fostering an environment where our employees feel included, valued, and heard.

We are committed to meeting the needs of all individuals and support a barrier-free workplace. ai . Please be advised that we may use artificial intelligence (AI) tools to assist in the screening and assessment of applicants for this position. If you would like more information about how your data is processed, please contact us.

📌 Quantum Software Developer - Performance (Toronto)
🏢 Xanadu
📍 Toronto