Software Engineering - Machine Learning

At Q-CTRL, Quantum Computing Engineering is a global team of software engineers and infrastructure experts,combining deep technical expertise with a startup mindset to deliver real impact through software innovation. Our team excels in areas across back-end, front-end, machine learning, and platform engineering.

We transform Q-CTRL’s world-leading technological breakthroughs into commercial software products with applications across defense, research, and industry. We work closely with Product, Design, and Research teams to accelerate the path to quantum advantage worldwide.

As a Software Engineer on the Boulder Opal team, you will build the backend infrastructure that supports our quantum software platform. You'll work alongside compiler engineers and researchers to develop scalable backend systems, APIs and performance-critical services while growing your understanding of compiler technologies and quantum computing.
This role is ideal for a strong backend engineer interested in systems programming who wants to develop expertise in compiler engineering over time.
Design, build and maintain scalable backend services in Python and C++.
Develop APIs and backend services supporting our compiler and quantum runtime.
Build reliable distributed systems and cloud-native services.
Improve performance, reliability and observability across backend components.
Work with researchers and product teams to deliver new platform capabilities.
Bachelor's degree in Computer Science, Engineering or related discipline.
Strong programming skills in Python.
Experience with modern C++.
Experience building backend systems or distributed services.
Experience building high-performance backend systems.
Experience with asynchronous programming and concurrency.
Experience with FastAPI, Flask or Django.
Familiarity with compiler concepts or programming language implementation.
Interest in quantum computing or scientific software.
Experience with Rust, Go, or other systems programming languages.

Depending on the position offered, this role may be eligible for annual discretionary bonuses, equity and other forms of compensation outside of the targeted base salary range. Q-CTRL is the global leader in AI-powered quantum control infrastructure software. We build the tools that make quantum technology useful, solving the hardest challenges in quantum computing and quantum sensing to deliver real-world impact.

Our teams bring together technical and multi-disciplinary expertise across the product lifecycle, and we’re hiring talent to help scale every part of the business. In 2024 we raised US$113 million in Series B funding, the largest aggregate investment for a quantum software company. Six months later we delivered the first commercial quantum advantage with Ironstone Opal, our field-validated quantum navigation solution for defense and industry.

We offer flexibility, equity potential, and competitive benefits that reflect our high-performance culture. If you’re ready to help shape the future of quantum, we’d love to hear from you!

Qualified applications with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act.

All our active job postings are available on our company website .

To recruitment agencies, we do not accept unsolicited branded profiles and are not responsible for any fees related to unsolicited resumes.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. If you would like more information about how your data is processed, please contact us.