{"id":1681556,"url":"https://alion.io/job/xanadu-ai-quantum-software-developer-performance-2","title":"Quantum Software Developer - Performance","company":{"id":698,"name":"Xanadu AI","domain":"xanadu.ai","url":"https://alion.io/company/xanadu-ai","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"HiBob","truth_index":null},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Toronto, Canada"],"countries":["CA"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":76000,"max_usd":181000,"period":"year","method":"role_country_seniority_unknown","sample_n":697},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"C++","optional":false},{"name":"CI/CD","optional":false},{"name":"CUDA","optional":false},{"name":"CUDA Toolkit","optional":false},{"name":"GCP","optional":false},{"name":"HPC","optional":false},{"name":"OpenMP","optional":false},{"name":"PennyLane","optional":false},{"name":"Python","optional":false},{"name":"ROCm","optional":false}],"status":"live","first_seen_at":"2026-08-14T17:20:39Z","employer_posted_date":"2026-10-02","last_verified_at":"2026-10-05T22:52:38Z","board_verified":true,"closed_at":null,"days_open":52,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":52},"description":"About Xanadu: Xanadu’s mission is to build quantum computers that are useful and available to people everywhere.\nAt 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!\nYour Role and Responsibilities:\n 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.\nYou will:\nDevelop the framework for benchmarking the compilation and execution pipeline, tracking quantum resources through the stack, and profiling the quantum software.\nDevelop high-performance software components, adapting to new hardware platforms and programming paradigms.\nConvert abstract descriptions of algorithms into efficient & understandable software implementations.\nInterpret and communicate complex concepts to the wider team.\nParticipate in software system specification, design, and quality assurance (e.g., requirements gathering, defining software architecture, documentation, verification & validation, etc.).\nProvide leadership in software best practices, including continuous-integration pipelines, unit testing, & code review.\n Basic Qualifications and Experience:\nBSc in Computer Science, Engineering, Physics, Math, or a related field.\nDemonstrated education or training in quantum computing.\nProficiency in high-performance Modern C++ (C++17/20 preferred) and Python.\nDeep 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).\nProven ability to rapidly diagnose and resolve complex issues across compiled and interpreted environments using industry-standard debuggers.\n Preferred Knowledge and Experience:\nMSc, PhD in Computer Science, Engineering, Physics, Math, or a related field.\nExpertise in quantum computing, as demonstrated by extensive coursework, thesis, or peer-reviewed publications.\nExperience with writing complex quantum workflows and optimizing the use of quantum resources.\nFamiliarity 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.\nExperience in low-level systems programming (e.g. direct memory management, low-latency communication, heterogeneous hardware peripherals) \nExperience in designing and implementing scalable & reproducible scientific workloads on HPC / supercomputer platforms or cloud hardware (e.g., AWS, Azure, GCP).\nThis is for a new position. Your base salary will be determined based on your location, experience, and internal benchmarks. The base salary range is 120,000 - 160,000 CAD. You will also be eligible for equity and benefits.\nOur values are important. They are fundamental and lay the foundation for culture at Xanadu. Learn more about our values here.\nWe 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 .\nPlease 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.","description_format":"text","description_chars":4440,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":true},"security_clearance":false,"languages":[]},"benefits":["Equity"],"hiring_locations":[{"name":"Canada","iso":"CA","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Quantum Computing Hardware"],"lifecycle":[{"event":"open","at":"2026-10-02T09:45:59Z"}],"visa":[],"liveness":{"score":3,"band":"cold","label":"Long shot","p_open":1,"p_active":0.091,"p_room":0.35,"age_days":51,"expected_fill_days":6,"reasons":["conf:1","velocity","win:tail"],"computed_at":"2026-10-05T05:45:15Z"},"pay":null,"html_url":"https://alion.io/job/xanadu-ai-quantum-software-developer-performance-2","json_url":"https://alion.io/job/xanadu-ai-quantum-software-developer-performance-2.json","meta":{"generated_at":"2026-10-06T00:39:31Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler","counted_by":"address","units_charged":1,"used_today":798,"day_limit":5000,"remaining_today":4202,"minute_limit":60,"resets_at":"2026-10-07T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":698},"rest":"https://alion.io/mcp/rest/get_company?id=698"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fxanadu-ai-quantum-software-developer-performance-2"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fxanadu-ai-quantum-software-developer-performance-2"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fxanadu-ai-quantum-software-developer-performance-2"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/xanadu-ai-quantum-software-developer-performance-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fxanadu-ai-quantum-software-developer-performance-2"}]}