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Senior Front-End Engineer, Quantum Tools

ionqOxfordPosted 3 Oct 2026

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About this role

About IonQ: IonQ, Inc . [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 . Headquartered in College Park, Maryland, IonQ has operations in California, Colorado, Massachusetts, Tennessee, Washington, Italy, South Korea, Sweden, Switzerland, Canada, and the United Kingdom. Our quantum computing services are available through all major cloud providers, while we also meet the needs of networking and sensing customers across land, sea, air, and space.

IonQ is making quantum platforms more accessible and impactful than ever before. Location: Oxford, England, UK Working pattern: Hybrid, two days per week on site (minimum) The Role: We are looking for a Senior Front-End Engineer to join our Quantum Tools software team at IonQ. In this role, you will be responsible for designing, developing and supporting web based tools for scientific research and hardware integration for use by our teams of quantum scientists and engineers to enable their work on our research and development goals as an organisation.

Your role will be to shape best in class UX/UI that sets the standard across IonQ. This will directly contribute to our core mission of building, operating and supporting the world's most powerful quantum computers. Responsibilities: In this position, you will work on building a number of different tools for our teams, including information dense dashboard, system telemetry and calibration, amongst others. You will need to create tools capable of managing complex states in a data intensive application environment, supporting the effective delivery of quantum tooling for the next gen platforms.

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You’ll have the opportunity to deepen your understanding of complex systems, design features end to end that directly impact users, contributing directly to the success of the project. Key responsibilities include: Working on developing scientific software and hardware control interfaces for use by teams across IonQ. Adhering to and setting strict testing discipline. Liaising with users from a range of cross-functional backgrounds to gather requirements for tools and gain a better understanding of workflows.

Designing and implementing web based tooling. Work as part of the wider quantum tools and software team to embed best practice and stronger processes. Requirements: To be successful in this role, you will require prior experience in front-end development, including working with Typescript, HTML, CSS and React. We are looking for someone who can work across teams, turn abstract workflow into a concrete graphical tool working closely with backend engineers and contribute effectively within a fast moving, highly technical team.

You’d be a great fit with: Deep experience in a modern framework such as React, Vue, Svelte or Solid. Experience building interfaces around streaming data, including handling frequent updates, subscriptions, connection failures and clear system-status feedback. Experience building interactive charts and working with large datasets. The ability to diagnose rendering bottlenecks and reason about plot update frequency, virtualisation, and SVG, Canvas and WebGL trade-offs.

Sound interaction and visual design judgement for information-dense operator tools, including information hierarchy, accessibility and keyboard workflows. Benefits: Be part of a team that’s shaping the future of quantum. We offer more than just a role, you’ll join a world class community of scientists, engineers and innovators working to unlock the full potential of quantum computing. We offer a range of benefits, including opportunities to further your career alongside industry leaders, a competitive salary with IonQ stock options, an annual performance bonus, generous annual leave, flexible hybrid working, private medical and dental insurance for you and your family, and much more.

Join us and be part of the future of quantum computing. We’re proud to be an equal opportunity employer and welcome applicants from all backgrounds. 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. Details of participation in these benefit plans will be provided when a candidate receives an offer of employment. At IonQ, we believe in fair treatment, access, opportunity, and advancement for all while striving to identify and eliminate barriers.

We empower employees to thrive by fostering a culture of autonomy, productivity, and respect. We are dedicated to creating an environment where individuals can feel welcomed, respected, supported, and valued. 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.

We are proud to be an Equal Employment Opportunity employer. US Technical Jobs. The position you are applying for will require access to technology that is subject to U.S. export control and government contract restrictions. Employment with IonQ is contingent on either verifying “U.S. Person” (e.g., 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. Please note that in the absence of confirming you are a U.S. 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.S. Persons, and IonQ may decline to proceed with your application on those bases alone.

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. Due to applicable export control laws and regulations, candidates must be a U.S. citizen or national, U.S. permanent resident (i.e., current Green Card holder), or lawfully admitted into the U.S.

as a refugee or granted asylum. 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 compli

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