Senior Software Engineer, Infleqtion
+ Incentive Stock Option Plan
3-5 days a week in office (Didcot & Kidlington, Oxford)
Quantum technology for commercial products
Open for applications
Quantum technology for commercial products
101-200 employees
Open for applications
+ Incentive Stock Option Plan
3-5 days a week in office (Didcot & Kidlington, Oxford)
101-200 employees
Company mission
Infleqtion's mission is to make quantum work for everyone.
Role
Who you are
- The ideal candidate is an experienced backend engineer with a strong background in creating robust and scalable scientific applications
- Bachelor's degree in Computer Science, Applied Mathematics, Physics or related field and a minimum of 5 years prior work experience
- Experience with Python and at least one compiled language, with a desire to learn and work in Rust
- Experience with Linux and virtualization technologies like Docker
- Good verbal and written communication skills, able to effectively share information with technical and non-technical staff
- Good collaboration skills, able to work in a team environment where engagement and participation are an expected part of successful job performance
- Skilled in typical software engineering disciplines: testing, debugging, version control, error-handling, readability, documentation, general code health, etc
- Desire to constantly improve and learn inside and outside of expertise
Desirable
- Domain-specific experience in statistics, machine learning, or AMO physics
- Experience with Numpy, Scipy, and Pytorch
- Experience with image analysis, emphasis on realtime object detection
- Experience with databases (relational and non-relational) including but not limited to timeseries data, SQL, and ETL processes
- Experience creating and maintaining CI/CD pipelines, and Python package creation with C or Rust extensions
What the job involves
- This is a full-time position in our compute lab on the Harwell Campus, Didcot, with some time spent at our Kidlington, Oxford office
- We are seeking a Senior Software Engineer to join the team building the control system software for Infleqtion’s quantum computers
- You will play a crucial role in designing, building, and maintaining backend services and control systems that drive our neutral atom quantum machines
- Design, develop, and deploy reliable, maintainable, scalable, and fault-tolerant backend services and frameworks that control and calibrate our neutral atom quantum computers
- Collaborate with interdisciplinary teams, including scientists, opto-mechanical engineers, and electrical engineers, to solve complex problems and deliver high-quality software solutions
- Empower interdisciplinary teams to create the tools they need by teaching engineering and programming best practices
- Mentor and guide junior engineers, fostering their growth and enhancing the team's technical expertise
- Lead code and design reviews, upholding engineering best practices and promoting a culture of quality and collaboration
- Support and debug all layers of the control stack from real-time embedded kernels to distributed services
- Advocate for and implement innovative software development methodologies and tools to improve team efficiency and product quality
- Duties, responsibilities, and activities may change, or new ones may be assigned at any time
Our take
Quantum physics is a rapidly developing scientific field that promises great innovations within computing, with some working quantum computers already existing. However, such computers are extraordinarily expensive and complex to operate, making it difficult for startups to leverage the technology and apply it to commercial products.
Infleqtion, previously known as ColdQuanta, develops quantum computers, sensors, and networks, integrating them together to form an ecosystem of cloud-hosted quantum infrastructure readied for commercialization. This empowers businesses to leverage quantum computing without them needing their own quantum computer, accelerating adoption of the tech.
While quantum computing has rapidly developed from proof-of-concept to practical applications in the last decade, it has yet to break into common use. By increasing accessibility to the current state of practical quantum technology, Infleqtion should be able to help disrupt industries across the board. Its research arm, which has retained the "ColdQuanta" identity, remains primed to bring new advances to the space, which will, in turn, be more quickly commercialized. Substantial grants awarded in 2024 will help Infleqtion develop its quantum clock product for precision timing.
Steph
Company Specialist at Welcome to the Jungle
Insights
16% employee growth in 12 months
Company
Funding (last 2 of 13 rounds)
Jun 2025
$100m
SERIES C
Mar 2025
$6.2m
GRANT
Total funding: $409.2m
Company benefits
- Unlimited Time Off - We encourage employees to take time away from work to promote balance in their lives
- Paid Parental Leave - Eligible employees will receive 12 weeks of Parental Leave paid at 100% of the employee’s regular wages
- 100% Paid Insurance Premium - Infleqtion pays for 100% of the employee premiums costs for Health, Dental, and Vision Insurance & pays 90% for dependents
- Additional Paid Time Off - 11 paid holidays per year, plus bereavement leave, paid jury duty, paid time off to vote, and more!
- Stock Options
- Retirement - 401(k) contributions with a 3% employer match
- Student Loan Repayment - $100 per month match in student loan repayment
- Employee Assistance Program to all team members
- Relocation Assistance
Company HQ
Financial District, Austin, TX
Leadership
Matthew Kinsella
(CEO)Also the Investor & Board Director at Aptible, BioCatch, Conveyor and Cylera.
Dana Anderson
(CSO & Founder)Also a Professor of Physics at University of Colorado Boulder, where he was previously a Director of Optical Science and Engineering. Was a Fellow at Caltech.
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