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Embedded System Engineer



Software Engineering
Fareham, UK · England, UK · United States · Oxford, UK
Posted on Monday, November 20, 2023
Infleqtion delivers high-value quantum information precisely where it is needed. By operating at the Edge, our software-configured, quantum-enabled products deliver unmatched levels of precision and power, generating streams of high-value information for commercial organizations, the United States, and allied governments. With 16 years of ColdQuanta's pioneering quantum research as our foundation, our hardware products and AI-powered solutions address critical market needs in PNT, global communication security and efficiency, resilient energy distribution, and accelerated quantum computing. We currently have offices in Austin, TX; Boulder, CO; Chicago, IL; Louisville, CO; Madison, WI; Melbourne, AU; and Oxford, UK. Learn how Infleqtion is revolutionizing how we communicate, navigate, and discover at


This position is a full-time position and is based in our Oxford, England office.

Position Summary

Infleqtion UK is looking for an embedded systems engineer with a passion for working with a multi-disciplinary team to bring state-of-the art quantum technologies outside the laboratory and into the real-world. You will use your analytical and problem-solving skills to contribute to the design, implementation, and operation of atom-based quantum technologies, such as inertial navigation systems, radiofrequency sensors, and atomic clocks.

Job Responsibilities

The duties and responsibilities outlined below include essential functions of the role. Depending on business needs, this role may perform a combination of some or all of the following duties. Duties, responsibilities, and activities may change, or new ones may be assigned at any time with or without notice.

  • Work collaboratively with a multidisciplinary team to coordinate the development and productisation of atom-based quantum technologies, such as atomic clocks and inertial sensing systems
  • Develop electronics and microsystems solutions required to control atomic clock subsystems, including laser and frequency comb drivers, amplifiers, various types of photodetectors (such as photomultipliers and photodiodes), thermal sensors, heaters, and coolers, and RF upconversion/downcoversion
  • Implement real-time control systems in embedded C or Rust
  • Implement DSP algorithms on embedded devices
  • Implement control algorithms eg PID
  • Create, document, and maintain control electronics design and architecture
  • Develop software to interface with microcontroller and FPGA-based peripherals in Python or C
  • Prototype, test, and validate software and hardware stack using test and measurement equipment
  • Conduct design reviews based upon targeted product specifications
  • Manage technical priorities, deadlines, and deliverables


  • mission-critical - Significant experience of embedded product development in engineering, computer science or related field
  • Proficient with embedded systems programming in C/C++ or Rust
  • Experience with hardware product development, new product introduction, and Product Life Cycle processes
  • Experience with electrical test, verification, and validation of products and subsystems
  • Experience in interfacing with peripherals over standardised protocols, such as SCPI, SPI, I2C, UART
  • Experience of developing reliable, high-performance, and documented code using standard software engineering disciplines: testing, error handling, readability, documentation, general code health
  • Strong debugging and problem-solving skills
  • Keen to work on cutting-edge products where the solutions you develop are time and mission critical
  • Ability to work collaboratively in a multi-disciplinary team

Desirable Skills Or Knowledge

  • Familiarity with opto-mechanical, electro-optic, atomic and/or quantum technology systems
  • Experience with FPGA programming
  • Experience with mid to high-volume commercial products
  • Experience of managing source code in a version control system e.g. Git


In addition to your base compensation, we offer a generous Total Rewards program which includes:  

  • Competitive salary
  • Unlimited PTO
  • Generous company pension contribution
  • Cycle to work and Technology schemes
  • Incentive Stock Option Plan