Senior Quantum Software Developer

Toronto, ON, Canada
Full Time
Software and Algorithms

About Xanadu:

Xanadu’s 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 world’s most challenging problems, and literally change the world. And that is something to be excited about!

Your Role and Responsibilities:

As part of the Xanadu Software Team, you will be responsible for building PennyLane, an open-source framework for programming quantum computers. The selected candidate must possess the ability to learn advanced scientific and technical concepts quickly and with minimal direction. Strong technical skills and a demonstrated ability to learn new concepts is important for this position. Experience in both quantum computing and software development is essential.

Required Qualifications and Experience:

  • BSc in Computer Science, Engineering, Physics, Math, or related field.
  • 5+ years of experience developing research or production software.
  • Experience with software best practices, including continuous-integration pipelines, unit testing, code review.
  • Strong programming experience in modern high-performance compiled languages, interpreted languages, and intermediate representations, including Python, modern C++, LLVM-IR.
  • Ability to convert abstract descriptions of algorithms into efficient code implementations.
  • Ability to understand and apply complex mathematical concepts.
  • Demonstrated education or training in quantum computing.
  • Exposure/familiarity to machine learning/deep learning.
  • Software development experience, demonstrated via a public online portfolio (i.e., GitHub account, contributions to open-source projects, etc.).
  • Self-motivated with a willingness to learn.
  • Comfortable working in a fast-paced environment.
  • High level of professionalism.
  • Willing to mentor junior colleagues in best practices and help them further their skills.

Preferred Qualifications and Experience:

  • MSc/PhD in Computer Science, Engineering, Physics, Math, or related field.
  • Expertise in quantum computing, quantum machine learning, or quantum chemistry, as demonstrated by extensive coursework, thesis, or peer-reviewed publications.
  • Experience with numerical computation and high-performance computing.
  • Experience with automatic differentiation methods and frameworks (e.g., autograd, Torch, TensorFlow, JAX).
  • Experience with JIT compilation frameworks and languages (e.g., numba, JAX, Julia).
  • Familiarity with multi-processing & distributed computation across all levels in the software stack (e.g. Dask.Distributed, Ray, MPI).
  • Knowledge of intermediate representation formats (e.g., LLVM-IR, MLIR, NVPTX).
  • Experience with scientific computing on HPC/supercomputing hardware.
  • Experience with scientific computing on commodity / cloud hardware (e.g., AWS, Azure, GCP).


Our values are important. They are fundamental and lay the foundation for the culture at Xanadu.

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 Human Resources at


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