Senior Electronics Engineer New Oxford, England, United Kingdom

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: Our office is located in Oxford, England (UK), with hybrid working
Job ID: 1820

The Role:

We are looking for a Senior Electronics Engineer to join our Reliability Engineering team at IonQ. In this role, you will be responsible for finding, root-causing, and permanently resolving electronics and control hardware issues on our operational trapped-ion quantum computers, contributing to the team’s mission of improving fleet uptime and driving down the operational cost of our commercial and development systems.

You’ll play an important part in owning the full lifecycle of electrical reliability fixes - from identifying a real-world bottleneck through to standardizing the resulting fix into every future build - working closely with Operations, Science, Manufacturing, and Engineering to keep our quantum systems running reliably and effectively.

Responsibilities

In this position, you will work on root-causing, designing, and deploying electronics system design fixes across our fleet of quantum systems, supporting the effective delivery of reliable, development and production hardware . You’ll have the opportunity to drive system upgrades, standardize control and drive electronics across systems, and build the observability that catches problems before they cause downtime , contributing directly to the success of the Reliability Engineering team .

Key responsibilities include:

• Triage & root cause: Actively monitor, root-cause, and prioritize electrical, control-system, and drive-electronics issues on live systems based on severity and impact to uptime and performance.
• Solution development: Design, prototype, build, and test electrical fixes - spanning schematic capture, PCB layout, and board- and system-level test - taking solutions from concept through to permanent integration.
• Reliability upgrade leadership: Drive electrical workstreams for major fleet-wide upgrades (e.g. control-hardware consolidation, drive-electronics standardization, remote telemetry/monitoring for laser and system health) to reduce variance and downtime across systems.
• Retrofitting & deployment: Coordinate directly with Operations and Science teams to schedule, deploy, and retrofit upgrades onto live systems while managing operational constraints, and verify fixes improve system performance, reliability or operability.
• Documentation & standardization : Feed validated fixes back into engineering documentation, build manifests, and the Engineering Change Request (ECR) process so every improvement is baked into the baseline for all future builds.

Requirements

To be successful, you will need strong foundations in analogue, RF, and mixed-signal electronics design, experience with the Altium PCB toolset, familiarity with RF concepts and confidence working directly onoperational hardware under time pressure. We’re looking for someone who can translate a system-level reliability problem into a concrete engineering solution, work across Operations, Science, and Engineering to get it deployed safely, and document it so it sticks. You’d be a great fit with:

• Analogue and mixed-signal electronics: strong practical experience designing and debugging op-amp circuits, low-noise amplifiers, filters, ADC/DAC modules, grounding, shielding and common digital interfaces.
• Altium design control and documentation: strong experience managing evolving schematics and PCB designs in Altium, producing clear technical documentation, and establishing effective review, ERC/DRC, release and change-control processes.
• Fault-finding and electrical integration: able to diagnose power supplies, analogue circuits and control electronics, and develop reliable PCBs, adapters, connectors, breakout cables and harnesses.
• Stakeholder engagement and delivery: able to gather requirements, explain technical issues and trade-offs across different disciplines, and take solutions through testing, deployment and documentation.
• Bonus: familiarity with LVDS and FPGA-based control electronics, cryogenic or RF/microwave systems, and Python-based test automation or telemetry.

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.

• comprehensive medical
• dental
• vision plans
• matching 401(k)
• unlimited PTO and paid holidays
• parental/adoption leave
• legal insurance
• a home technology stipend

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 compliance personnel to ensure compliance with federal law.

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