Senior Software Engineer, IonQ

• Bachelor's degree in Computer Science, Engineering, Physics, or a related field, or equivalent training, fellowship, or work experience
• 6+ years of professional software engineering experience in team environments
• Deep proficiency in Python, our primary language
• Experience with quantum computing, with an understanding of quantum gates and circuits
• Familiar with the fundamentals of quantum compilation, error mitigation and quantum error correction
• Experience with software maintenance, user community stewardship and software engineering best practices
• Experience working with research or academic concepts and integrating them into scientific software workflows
• Familiarity with Agentic AI coding tools and techniques such as skills, docstring generation, code review, and software engineering best practices
• A track record of creating clear, comprehensive technical documentation
• Experience with automated testing, CI/CD pipelines, and scientific software validation
• Strong collaboration skills, with experience working across research and engineering teams

Desirable

• As a Senior Software Engineer for Developer Tools, you will be a key contributor to the software that connects quantum developers to IonQ's hardware
• You will focus on contributing to quantum compiler tools and features that our users and internal research teams depend on to run applications
• You will build tooling to give users deep insights into how their circuits are optimized and create intuitive, user-friendly interfaces for hardware-specific compiler passes, such as quantum error mitigation and quantum error correction, and ensure our tools are robust and well-documented
• You will work closely with our Compiler, QEC, and Applications teams to take new features through development, testing, documentation, packaging, and release, and use software engineering best practices to document, distribute, and use them in quantum software applications
• The Developer Tools team builds the critical software layer for the quantum ecosystem
• In this role, you will help shape an ecosystem of tooling that turns high-level quantum circuits into optimized instructions for our quantum computers
• Your work will directly impact the performance, reliability, and capabilities of quantum applications running on IonQ systems by focusing on the compiler's application-facing features and its connection to the hardware
• The compiler is where quantum algorithms meet quantum hardware
• Your work sits at the heart of this critical transformation
• The tools you build will define how developers interact with our systems, enabling them to extract maximum performance, trust the compilation process, and tailor optimization strategies for their specific use cases
• By focusing on compiler tools for applications, you empower developers to tackle real-world problems and push the boundaries of what's possible on quantum computers
• You'll make advanced techniques accessible, from sophisticated error mitigation to hardware-aware compilation
• This role offers a unique opportunity to work with world-class researchers and translate their innovations into production software that accelerates the path to quantum advantage for everyone
• Design, build, and maintain compiler toolchains, optimization tools, and circuit transformation libraries for developer-facing applications
• Work with the Compiler and Applications teams to package, test, and document new compilation features for both internal and external developers
• Architect and implement interfaces for hardware-specific compilation features, giving developers deeper control and visibility
• Integrate automated error mitigation, quantum error correction, and other advanced compilation strategies into our cloud platform and SDKs
• Maintain comprehensive documentation, examples, and tutorials for compilation workflows
• Support the testing and validation of compilation features across different IonQ backends and system configurations, and capabilities such as mid-circuit measurement and branching
• Collaborate with the Applications Engineering team to understand and address customer needs related to compilation and circuit optimization