Senior Quantum Software Engineer; Back-end

About us

Founded in 2017, Q-CTRL has grown to become the global leader in quantum. We’re using control to solve the hardest problems facing quantum technology, improving hardware performance and accelerating pathways to useful quantum computers and other technologies. As a product-led company, we bring together diverse teams such as product, design, engineering and research to help achieve our mission of making quantum technology useful.

Join us to help shape the quantum future.

As one of the fastest growing companies in the quantum sector, we’ve had a number of key milestones:

• In November 2023, we announced an industry-first partnership with IBM Quantum Services, natively integrating our performance management software with all IBM quantum computers. Building off of this relationship, in September 2024 we started offering two services via IBM’s new Qiskit Functions Catalog as an inaugural partner.
• Designed and moved our Global HQ offices and lab space into the first purpose-built (and award winning) commercial and research facility for a quantum technology company in Australia.
• Continued to deliver real world outcomes across the quantum sectors, with our work with Australian Defence on software-ruggedized quantum sensing for navigation without GPS, as featured in the New York Times.
• In October 2024, we announced our record breaking expansion of our Series B funding round to USD $113M, with $59M USD of new capital.
• Grew our global presence to include Los Angeles, Berlin, and Oxford - as well as the recently announced office in San Francisco.

From educating the workforce on how quantum computing works, to building the next generation of quantum sensors, to delivering massive performance gains for end-users, it all starts with hiring the right talent. If you want to help us build the Quantum future, read on.

As a Senior Back-end Engineer on the Boulder Opal Scale Up team, you’ll be at the forefront of building the software backbone that powers the future of quantum technology. You’ll work side by side with brilliant engineers and researchers, designing and delivering scalable, high-performance systems that bring groundbreaking science into the real world.

From SDKs to cloud-based platforms, your work will shape the tools researchers and customers use every day. You’ll not only develop world-class backend systems but also help translate cutting-edge research into production-ready solutions, bridging the gap between quantum experiments and reliable software.

If you’re excited about building robust systems, tackling complex problems, and exploring the edge where software meets quantum physics, this is your opportunity to make a real impact in one of the most exciting fields in technology today.

• Build impactful systems:
  Design, develop, and optimize scalable backend applications in Python that power real-world quantum technology.
• Engineer for performance:
  Create high-efficiency service-to-service communication using modern protocols.
• Bridge science and engineering:
  Work hand-in-hand with researchers to translate cutting-edge research code into production-ready solutions, while sharing engineering best practices.
• Deliver end-to-end solutions:
  Partner with product, frontend, and infrastructure teams to ship integrated features used across Q-CTRL’s products.
• Champion quality:
  Implement and enforce best practices for code quality, security, and operational excellence.
• Solve tough problems:
  Troubleshoot, optimize, and enhance system performance and reliability at scale.
• Shape reusable architectures:
  Develop product features that promote flexibility, reuse, and scalability across multiple business cases.
• Contribute broadly:
  Take on other responsibilities aligned with your skills and experience and grow into new ones with support and training.
• Other duties within the Employee's skills and experience, or with reasonable training.

• 5+ years of backend engineering experience with Python, Rust, C++, or similar.
• A track record of collaborating across research and engineering to solve hard technical challenges.
• Strong problem-solving skills and a proactive, ownership-driven…