Quantum Software Developer - Performance

Job Description

Job Title: Quantum Software Developer - Performance. Location: Toronto, Canada

Responsibilities:

• Develop benchmarking frameworks for compilation and execution pipelines, track quantum resources, and profile quantum software.
• Build high-performance software components that adapt to new hardware platforms and programming paradigms.
• Convert abstract quantum algorithms into efficient and understandable software implementations.
• Interpret and communicate complex technical concepts to the wider team;
• Participate in software specification, system design, requirements gathering, architecture, documentation, verification, and validation.
• Contribute to continuous integration pipelines, unit testing, code reviews, and other software engineering best practices.
• Work on performance monitoring and benchmarking for the PennyLane and Catalyst quantum software stack.
• Develop high-performance extensions, including components of the PennyLane-Lightning simulator suite.

Qualifications:

• Bachelor's degree in Computer Science, Engineering, Physics, Mathematics, or a related field.
• Demonstrated education or training in quantum computing.
• Proficiency in C++17/20 and Python;
• Strong understanding of computer architecture, including CPUs, GPUs, and memory hierarchies.
• Hands-on experience optimizing code for runtime and memory efficiency using professional profiling tools such as perf, scalene, or valgrind.
• Ability to rapidly diagnose and resolve complex issues across compiled and interpreted environments using industry-standard debuggers.

Preferred:

• Master's or PhD in Computer Science, Engineering, Physics, Mathematics, or a related field.
• Extensive knowledge of quantum computing through coursework, thesis work, or peer-reviewed publications.
• Experience developing complex quantum workflows and optimizing quantum resource usage;
• Experience with parallelization and accelerators, including OpenMP, C++ threads, MPI, CUDA, HIP/ROCm, or compiler offload directives.
• Experience with low-level systems programming, including direct memory management, low-latency communication, and heterogeneous hardware peripherals.
• Experience designing and implementing scalable, reproducible scientific workloads on HPC, supercomputers, or cloud platforms such as AWS, Azure, or GCP.

Benefits and Compensation:

• Base salary range: CAD 120,000 to CAD 160,000 per year.
• Equity eligibility.
• Employee benefits.
• Salary determined based on location, experience, and internal benchmarks.

Other Information:

• Xanadu is an equal opportunity employer.
• Workplace accommodations are available throughout the recruitment process.
• AI tools may be used during applicant screening and assessment, but final hiring decisions are made by humans.