Quantum Software Developer Performance (Hybrid)

About Xanadu

Xanadus mission is to build quantum computers that are useful and available to people everywhere.

At Xanadu we are learners innovators researchers collaborators and problem solvers. We are creating something that has never been built before. 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 worlds most challenging problems and literally change the world. And that is something to be excited about!

Your Role and Responsibilities

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.

You will:

• 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.
• Interpret and communicate complex concepts to the wider team.
• 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.

Basic Qualifications and Experience:

• BSc in Computer Science Engineering Physics Math or a related field.
• Demonstrated education or training in quantum computing.
• Proficiency in high-performance Modern C (C17/20 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).
• Proven ability to rapidly diagnose and resolve complex issues across compiled and interpreted environments using industry-standard debuggers.

Preferred Knowledge and Experience:

• MSc PhD in Computer Science Engineering Physics Math or a related field.
• Expertise in quantum computing as demonstrated by extensive coursework thesis or peer-reviewed publications.
• Experience with writing complex quantum workflows and optimizing the use of quantum resources.
• Familiarity with code parallelization and accelerators: multithreading (e.g. OpenMP C threads) multiprocessing (e.g. MPI) GPUs (e.g. CUDA HIP/ROCm) or compiler offload directives.
• Experience in designing and implementing scalable & reproducible scientific workloads on HPC / supercomputer platforms or cloud hardware (e.g. AWS Azure GCP).

Our values are important. They are fundamental and lay the foundation for culture at Xanadu. Learn more about our values here.

At Xanadu we are committed to building an inclusive safe 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. Should you require accommodations at any point during the recruitment process please contact Recruiting at .

Note: Xanadu will never ask you for bank account information as part of the interview process. Please report any suspicious activity to .