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Software Developer - Backend (Intermediate to Senior)

Xanadu - Toronto, ON, Canada - In-office

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Salary: CAD 150,000 - 180,000 / annual

Xanadu is building quantum computers to solve some of the world's most challenging problems. As a Software Developer on the Backend team, you'll help build and scale the PennyLane.ai ecosystem—an open-source framework for quantum machine learning, quantum computing, and quantum chemistry. No quantum experience required; you'll learn on the job. Key responsibilities include: - Build, scale, document, and maintain products within the PennyLane.ai ecosystem - Design and implement robust APIs for internal/external services and web frontends - Work with product owners to derive requirements and ensure technical feasibility - Maintain high-quality production code through automated testing and code review - Own significant domain areas, exploring and advocating for new technologies - Lead the design of large-scale, fault-tolerant, distributed systems - Develop and improve engineering processes for developer efficiency and consistent delivery - Mentor developers and foster a culture of continuous technical growth Required qualifications: - BSc in Computer Science, Engineering, Physics, Math, or related field - 6+ years of professional software development experience (Senior level) - Strong knowledge of Python, Go, or Rust - Proficiency in PostgreSQL and SQL optimization - Experience with Docker, Infrastructure as Code, and cloud deployment (AWS/Google Cloud) - Strong communication skills and product-minded approach - Ability to thrive in a fast-paced environment Preferred qualifications: - Hands-on experience building large, fault-tolerant, distributed systems at scale - Advanced knowledge of distributed system patterns and performance tuning - Experience managing deployment pipelines (GitHub Actions, Docker, Terraform) - Proficiency with modern web frameworks (NextJS/React) - Technical lead experience or oversight of complex, multi-stakeholder projects - Track record of mentoring developers Compensation: CAD 150,000–180,000 base salary for senior candidates, plus equity and benefits.

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