Posted 3 months ago
System Software Developer - Performance
@ Xanadu
Toronto, Ontario
Overview
Xanadu is hiring a System Software Developer for its PennyLane Performance Team, a new full-time position. The role builds high-performance libraries for low-latency communication between CPU, GPU and FPGA devices, and extends the PennyLane-Lightning simulator and benchmarking tooling. The posting states a base salary of 120,000 to 160,000 CAD plus equity and benefits, with pay set by location, experience and internal benchmarks.
Responsibilities:
- Develop low-latency communication libraries for CPU/GPU/FPGA systems
- Build high-performance software components and simulator extensions
- Create benchmarking and profiling frameworks for the quantum stack
- Convert algorithm descriptions into efficient software implementations
- Lead software best practices including CI, testing and code review
Requirements summary:
- BSc in Computer Science, Engineering, Physics, Math or related field
- Low-level networking or systems programming experience
- Proficiency in modern C++ and Python
- Experience optimizing code with profiling and debugging tools
- MSc or PhD and quantum computing expertise preferred
Tools & skills
Source and dates
Source type not verified · hibob
- Employer posting date
- 2026-08-14
- First seen by our source
- 2026-10-27
- Source record updated
- 2026-10-27
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Department | Software development |
| Hours per week | 40 (estimated) |
| Work setting | Office |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Languages | English |
| Education | Bachelor’s degree (required), Master’s degree (preferred), Doctorate (preferred) |
| Fields of study | Computer Science, Engineering, Physics, Math |
| Perks mentioned | Stock or equity |
Summary and details written by AI from the posting; the employer’s posting is the authority.
Xanadu
Saved company profile
Historical company information from a saved The Jobs API profile (LinkedIn/Crunchbase fields). It is not live-verified; figures may have changed. Missing values remain unknown.
Full company description
Xanadu Quantum Technologies Inc. is a Canadian quantum technology company, and one of the world's leading photonic quantum hardware providers. Founded in 2016, Xanadu's mission is to build quantum computers that are useful and available to people everywhere. To achieve this mission, the company has taken a full-stack approach and builds hardware, software, and pursues state-of-the-art research with select partners. The company is also advancing the field of quantum machine learning (QML) through the development of PennyLane, an open-source project that has become a leading software library among quantum researchers and developers. Xanadu is bringing together exceptional minds from around the world to build something extraordinary. Learn more at xanadu.ai
- LinkedIn followers
- 56,801
- People associated on LinkedIn
- 342
- Reported office locations
- Toronto, Ontario M5B 2H7, CA
- Other recorded names
- Xanadu
- Specialties
- Quantum Computing
- Artificial Intelligence
- Machine Learning
- Deep Learning
- Cloud Computing
- Quantum Simulations
- and Quantum Algorithms
- Profile identifies a recruitment agency
- No
Xanadu Quantum Technologies Inc. is a Canadian quantum technology company, and one of the world's leading photonic quantum hardware providers. Founded in 2016, Xanadu's mission is to build quantum computers that are useful and available to people everywhere. To achieve this mission, the company has taken a full-stack approach and builds hardware, software, and pursues state-of-the-art research with select partners…
| Field | Value |
|---|---|
| Industry | Computer Hardware Manufacturing |
| Company size | 51-200 employees |
| Headquarters | Toronto, Ontario |
| Organization type | Privately Held |
| Year founded | 2016 |
| Specialties | Quantum ComputingArtificial IntelligenceMachine LearningDeep LearningCloud ComputingQuantum Simulationsand Quantum Algorithms |
| Open jobs on Jobsy | 76 |
| View page |
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:
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 author high-performance libraries that enable ultra-low latency communication between FPGAs and GPUs, develop other high-performance extensions such as the PennyLane-Lightning simulator suite, and contribute to the performance monitoring and benchmarking tooling for the PennyLane & Catalyst quantum software stack, ensuring PennyLane is the highest-performing framework for quantum computing.
You will:
- Develop primitives/libraries that enable ultra-low latency communication between devices in a distributed, heterogeneous system (CPU/GPU/FPGA)
- Develop high-performance software components, adapting to new hardware platforms and programming paradigms.
- Convert abstract descriptions of algorithms into efficient & understandable software implementations.
- Develop the framework for benchmarking the compilation and execution pipeline, tracking quantum resources through the stack, and profiling the quantum software.
- 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.
- BSc in Computer Science, Engineering, Physics, Math, or a related field.
- Demonstrated experience in low-level networking/systems programming (e.g. networking/low-latency communication (RDMA), concurrency and authoring of high-performance libraries, OS internals)
- 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).
- Proven ability to rapidly diagnose and resolve complex issues across compiled and interpreted environments using industry-standard debuggers.
- MSc, PhD in Computer Science, Engineering, Physics, Math, or a related field.
- 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).
- 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.
We are an equal opportunity employer and encourage candidates of all backgrounds to apply. 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 [email protected].
Please be advised that we may use artificial intelligence (AI) tools to assist in the screening and assessment of applicants for this position. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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