Full-Time

Atomic Source Integration Engineer

Posted on 10/9/2025

Quantinuum

Quantinuum

501-1,000 employees

Full-stack quantum hardware and software solutions

Compensation Overview

$97k - $125k/yr

+

Broomfield, CO, USA

In Person

US Citizenship, US Top Secret Clearance Required

Category
Hardware Engineering (3)
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Requirements
  • Bachelor’s Degree
  • Minimum 1-year hands-on laboratory experience, maintaining, troubleshooting, and operating electronic systems, complex optical systems, vacuum/cryogenic systems, or cold atom apparatus
  • Due to Contractual requirements, must be a U.S. Person defined as, U.S. citizen, permanent resident, or green card holder, worker granted asylum or refugee status
  • Due to national security requirements imposed by the U.S. Government, candidates for this position must not be a People's Republic of China national or Russian national unless the candidate is also a U.S. citizen.
Responsibilities
  • Work closely with a team of research scientists to develop, design, and characterize quantum computing-related hardware
  • Characterize and analyze the performance of components and subsystems and work with scientific teams to plan hardware performance improvements
  • Provide technical support to customers and support teams on sophisticated technical problems
  • Independently operate and solve issues
Desired Qualifications
  • Master’s degree in physics or a relevant engineering field, such as Optical, Electrical, or Mechanical
  • Experience building apparatus for controlling laser-cooled atomic systems
  • Ability to analyze large sets of data to pull out correlations and trends on performance
  • Desire to work in a fast-paced environment
  • Willingness to expand knowledge, learn new skills, and push the boundary of what’s possible
  • Able to think critically, solve problems, and be a strong teammate with intelligent risk-taking skills
  • Experience in performing system audits to ensure intended system functionality, operation, and performance requirements are achieved
  • Strong written and verbal communication skills

Quantinuum provides both quantum hardware and software. Its H1-1 processor runs any quantum program, and TKET is an architecture-independent stack that lets developers design circuits usable on different quantum devices. It adds quantum-secure protection by delivering encryption keys hardened for quantum threats at the device level. Its goal is to help real-world problems like fast drug development, new materials design, and supply-chain optimization, while keeping data safe from evolving cyber threats.

Company Size

501-1,000

Company Stage

IPO

Headquarters

Cambridge, United Kingdom

Founded

2021

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Simplify Jobs

Simplify's Take

What believers are saying

  • Partnerships with BMW, Mitsubishi Electric, and SoftBank create multi-year revenue streams in 2026.
  • Sandia-certified 99.921% two-qubit fidelity enables near-term fault-tolerant applications by 2027.
  • HPE integration places Helios into global supercomputing environments for scalable hybrid workflows.

What critics are saying

  • The $15.2B valuation relies on under $31M revenue and $301M losses, guaranteeing extreme volatility.
  • Quantum error correction remains unproven at scale; failure by 2027 collapses valuation to $1B.
  • Cash burn exceeds $158M annually; IonQ's 35% monthly drop signals sector-wide dilution within 9 months.

What makes Quantinuum unique

  • Quantinuum is the only company providing both hardware and software solutions in quantum computing.
  • It is the first to deploy quantum-computing-hardened encryption keys at the device level.
  • Helios is the first commercial quantum computer to pass the Quantum Volume 32,768 benchmark.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

401(k) Retirement Plan

401(k) Company Match

Flexible Work Hours

Paid Vacation

Paid Sick Leave

Parental Leave

Employee Discounts

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

-1%

2 year growth

0%
Jij Inc.
Jul 6th, 2026
JIJ researchers win Second Prize in poster session at "Quantinuum June 2026 Symposium"

JIJ researchers win Second Prize in poster session at "Quantinuum June 2026 Symposium" A joint research paper by JIJ Inc. researchers Wai-Hong Tam and Hiromichi Matsuyama, together with Dr. Reza Safari of the German Aerospace Center (DLR), received Second Prize in the poster session at the "Quantinuum June 2026 Symposium," hosted by Quantinuum K.K. The Quantinuum June 2026 Symposium brought together researchers and industry experts to discuss the latest advances and future directions in quantum computing. The event covered topics including quantum-classical hybrid computing, quantum error correction, quantum chemistry, and life sciences applications, and was held on June 2-3, 2026, at the Ito International Research Center, The University of Tokyo. The awarded research proposes Geometric Quantum Physics-Informed Neural Networks (GQPINNs), a new method that incorporates the symmetries of a target differential equation directly into the quantum circuit architecture of quantum physics-informed neural networks (QPINNs). The approach enables high-accuracy solutions with significantly fewer trainable parameters. In a benchmark using a 2D Poisson equation, GQPINNs reduced error by up to two orders of magnitude compared with a standard QPINN. The paper, "Geometric Quantum Physics Informed Neural Network," is available here. JIJ will continue to advance joint research with institutions in Japan and overseas, including DLR, and contribute to the real-world application of quantum technologies.

PR Newswire
Mar 18th, 2026
Quantinuum appoints Nitesh Sharan as CFO to drive quantum computing commercialisation

Quantinuum has appointed Nitesh Sharan as chief financial officer, effective 6 April 2026. Sharan brings over 25 years of global finance experience across technology, consumer products and consulting. He joins from SoundHound AI, where he served as CFO for nearly five years, leading the company through its 2022 public listing and overseeing strategic financial planning, accounting and corporate strategy. Previously, Sharan spent more than five years at Nike in various leadership roles, including vice president of investor relations and treasurer, and held senior positions at Hewlett-Packard over 15 years. Quantinuum chief executive Rajeeb Hazra said Sharan's experience guiding companies through complex growth and capital market environments will be crucial as the quantum computing company accelerates commercialisation.

HPCwire
Jan 14th, 2026
Honeywell Says Quantinuum Files Confidential Draft Registration for Proposed IPO

Honeywell says Quantinuum files confidential draft registration for proposed IPO. CHARLOTTE, N.C., Jan. 14, 2026 - Honeywell (NASDAQ: HON) today announced that Quantinuum LLC, which is majority owned by Honeywell, plans to make a confidential submission of a draft registration statement on Form S-1 to the U.S. Securities and Exchange Commission (SEC) relating to the proposed initial public offering of Quantinuum's common stock. The number of shares to be offered and the price range for the proposed offering have not yet been determined. The offering is subject to market and other conditions and the completion of the SEC's review process. This press release is being made pursuant to, and in accordance with, Rule 135 under the Securities Act of 1933, as amended, and shall not constitute an offer to sell, or the solicitation of an offer to buy, any securities. Any offers, solicitations or offers to buy, or any sales of securities, will be made in accordance with the registration requirements of the Securities Act. About Honeywell Honeywell is an integrated operating company serving a broad range of industries and geographies around the world, with a portfolio that is underpinned by our Honeywell Accelerator operating system and Honeywell Forge platform. As a trusted partner, we help organizations solve the world's toughest, most complex challenges, providing actionable solutions and innovations for aerospace, building automation, industrial automation, process automation, and process technology, that help make the world smarter and safer as well as more secure and sustainable. About Quantinuum Quantinuum is the world leader in quantum computing. The company's quantum systems deliver the highest performance across all industry benchmarks. Quantinuum's over 630 employees, including 370+ scientists and engineers, across the US, UK, Germany, and Japan, are driving the quantum computing revolution. For more information, please visit www.quantinuum.com. BOZEMAN, Mont., Jan. 14, 2026 - QCORE, Montana State University's Quantum Collaborative Research and Education facility, has been... Jan. 14, 2026 - Toyota Systems Corporation (Toyota Systems) and Fujitsu Limited, in collaboration with... TORONTO and NEWTON, N.J., Jan. 13, 2026 - Xanadu Quantum Technologies Inc., a leading photonic... PALO ALTO, Calif., Jan. 13, 2026 - PsiQuantum announced today that the company is collaborating with... NEW YORK, Jan. 13, 2026 - Haiqu, an emerging quantum software company, today announced an... AUSTIN, Texas, Jan. 12, 2026 - Accelsius, a leader in two-phase, direct-to-chip liquid cooling for AI...

Cryptopolitan
Nov 8th, 2025
Quantum stocks rally ~2,000% on hype not revenue, as bulls and skeptics clash

Quantum stocks rally ~2,000% on hype not revenue, as bulls and skeptics clash. * By Jai Hamid * Updated: November 8 2025 8:00 PM UTC In this post: * Rigetti and D-Wave stocks have jumped over 1,900% despite minimal revenue and no near-term profitability. * Investors are betting on future breakthroughs in Quantum computing, even though real-world use is still theoretical. * Analysts are split, with bulls seeing huge upside and skeptics warning of a momentum-fueled bubble. Quantum stocks tied to Rigetti Computing Inc. and D-Wave Quantum Inc. have surged more than 1,900% in the past year on expectations that the technology they are building will become the next major computing breakthrough, according to Bloomberg. Both companies are valued above $10 billion each, even though they currently produce only a small fraction of the revenue generated by traditional firms of similar size. Their machines are still in development stages, most uses are experimental, and the firms are burning cash while generating limited commercial income. They are worth more than Campbell's Soup while making less than 1% of its revenue, according to Bloomberg, so this trading frenzy has turned one of the most experimental areas of advanced computing into a heated battleground for investors. Supporters insist that if quantum computing technology being developed eventually works at scale, it could solve problems that classical machines cannot, but skeptics argue the market is ignoring fundamentals and is chasing hype with no clear timeline. Bulls describe a future payoff. Quantum backers say the technology being developed is meant to build machines far more powerful than traditional systems by performing calculations in parallel instead of one at a time. Some investors reportedly believe this will one day help design new drugs, model complex climate systems, and handle data workloads that overwhelm today's best hardware. Troy Jensen from Cantor Fitzgerald allegedly told Bloomberg that:- "If it works, it's going to be huge and explosive. If not, it could go to zero." The trade has been compared to early biotechnology investing, where investors can wait years for progress that may or may not arrive. The uncertainty is significant. Many researchers and executives accept that the potential is huge, but the timeline is unclear. Earlier this year, Nvidia chief Jensen Huang said meaningful results could still be decades away. Even so, political and corporate interests have not slowed. The Trump administration has named Quantum computing development a strategic priority. Fidelity International took part in a new financing round for Quantinuum, valuing the startup at $10 billion. Google has reported progress as well. Last year, the company stated that a chip it developed completed a task in five minutes that would have taken a supercomputer 10 septillion years. Traders who watched AI-related stocks rise over the past two years have moved quickly, aiming to position themselves before another wave of technology adoption. Haim Israel from Bank of America Merrill Lynch said, "Capital markets don't want to miss this moment." Alphabet saw its shares move higher on Oct. 22 when research suggesting new advances in its Willow processor briefly added $30 billion in market value. Skeptics highlight valuations and downside risk. Meanwhile, Bruce Cox of the Harrington Alpha Fund is betting against Rigetti Computing, saying, "There are no earnings, nothing to go on. The froth is crazy." And the recent pullback supports his view, because both Rigetti and D-Wave Quantum have crashed more than 34% from last month's highs, wiping out about $12 billion combined, according to data from Yahoo Finance. Financial comparisons show how stretched the valuations are. Rigetti, based in Berkeley, is expected to make around $20 million in the next four quarters, mostly from development contracts and component sales. At today's prices, the stock trades at more than 500 times projected revenue. Palantir trades at 72 times forward revenue. The Nasdaq 100 trades at under six. For Rigetti to be valued similarly to Nvidia at 17 times forward sales, its annual revenue would need to exceed $600 million. Analysts expect about $40 million in 2027. Even with these issues, analysts remain mostly positive. Six of seven analysts tracking Rigetti rate it a buy, with one neutral. All ten covering D-Wave Quantum recommend buying. Benchmark analyst David Williams raised his price target from $20 to $50, which prompted what he described as the most hate mail he has received in more than fourteen years. Williams said retail traders and momentum seekers are heavily involved and that long timelines make price swings inevitable. "Quantum's not going to escape a broader market selloff," he said.

Bloomberg Law
Nov 5th, 2025
Fidelity Invests in $10 Billion Honeywell-Backed Quantinuum

Fidelity International is investing in Quantinuum for the first time, joining the latest funding round for the quantum computing company controlled by Honeywell International Inc.

INACTIVE