NYSE: IONQ] is the world's leading quantum platform and merchant supplier - delivering integrated quantum solutions across computing, networking, sensing, and security. IonQ’s newest generation of quantum computers, the IonQ Tempo, is the latest in a line of cutting-edge systems that have been helping customers and partners including Amazon Web Services, and AstraZeneca achieve 20x performance results and accelerate innovation in drug discovery, materials science, financial modeling, logistics, cybersecurity, and defense. In 2025, the company achieved 99.99% two-qubit gate fidelity, setting a world record in quantum computing performance.

We offer a hybrid work model, allowing for remote work two days per week.

Travel: We are looking for a Senior Full Stack Software Engineer for Application Engineering . As a Software Engineer on the Applications Engineer team, you’ll be part of a cross-functional team whose mission is to deliver real-world applications and deliver value from the jump forward in computing that quantum solving represents. We don’t just build the world’s best quantum computers - we apply cutting-edge quantum tools to real-world problems.

Until this year, our team for Applications Research has been building prototypes and doing research, by working closely with our customers. Our recent department, Applications Engineering, transforms those prototypes and research into applications for broad use.

Our Application

Engineering team has a commitment to engaging user experience and showing quantum advantage, not just talking about it. To support that goal and lay the groundwork for future quantum-enhanced services, this role will also help polish our internal tools, APIs, and integrations. Along with humans, other digital tools and systems will need to easily read and parse the solutions we generate.

You will help shape how everyday developers visualize and use quantum computing to solve problems, in close collaboration with Developer Tools, Infrastructure, and Product teams. We bridge quantum computing to specific domain, by creating clear API interfaces in the language and visuals domain experts are experts in.



Designing the API endpoints and intuitive software library interfaces, making applications and tools easy to maintain and update Working closely with peers in Applications, Developer Tools, and Field Engineering teams to share best practices and give feedback on internal tools, especially rich data API’s to support large data sets, and where applicable, visualization Bachelor’s degree in Computer Science, Engineering, Physics, or a related field, or equivalent training, fellowship, or work experience ~5+ years of experience as a full stack developer, preferably in backends based on JavaScript, Python, Golang ~5+ years of experience in REST, GraphQL, or gRPC frameworks for robust data delivery ~ Previous work in scientific computing, quantum computing, or a technical consulting fields ~ Experience building or supporting rich UIs, especially with data visualization tools like three.js, D3, WebGL ~ A track record of shipping applications that solve real business problems ~ Familiarity with Agentic AI coding tools and techniques such as skills, docstring generation, code review, and best practices for AI coding 7+ years of experience as a full stack developer, preferably in Python or Golang as a backend language, ~3+ years frontend experience in Three.js, D3 or WebGL, for heavier visualization.

Experience in scientific computing, especially in numpy, pandas, or in C/C++ ~ Experience packaging backend APIs and UI into containerized solutions for deployment to cloud services such as AWS, GCP, etc. The total compensation package includes base, bonus, equity, and a range of benefit options found on our career site.

Compensation will vary based on individual factors such as education, qualifications, and experience of the final candidate(s), specific office location,



and calibration against relevant market data and internal team equity. Posted base salary figures are subject to change as new market data becomes available. Our benefits include comprehensive medical, dental, and vision plans, matching 401(k), unlimited PTO and paid holidays, parental/adoption leave, legal insurance, and a home technology stipend.

We are committed to equity and justice. We welcome different voices and viewpoints and do not discriminate on the basis of race, religion, ancestry, physical and/or mental disability, medical condition, genetic information, marital status, sex, gender, gender identity, gender expression, transgender status, age, sexual orientation, military or veteran status, or any other basis protected by law. US Technical Jobs.

S. export control and government contract restrictions. Employment with IonQ is contingent on either verifying "U.S. citizen, U.S. national, U.S. permanent resident, or lawfully admitted into the U.S. as a refugee or granted asylum) status for export controls and government contracts work, obtaining any necessary license, and/or confirming the availability of a license exception under U.S. export controls. Person for export control and government contracts work purposes, IonQ may choose not to apply for a license or decline to use a license exception (if available) for you to access export-controlled technology that may require authorization, and similarly, you may not qualify for government contracts work that requires U.Accordingly, we will have some additional questions regarding your immigration status that will be used for export control and compliance purposes, and the answers will be reviewed by compliance personnel to ensure compliance with federal law.

US Non-Technical Jobs. S. citizen or national, U.S. permanent resident (i.e., Accordingly, we will have some additional questions regarding your immigration status that will be used for export control and compliance purposes, and the answers will be reviewed by compliance personnel to ensure compliance with federal law. #

📌 Senior Full Stack Software Engineer - Application Engineering (Toronto)
🏢 IonQ
📍 Toronto