Q-CTRL

Senior Software Engineer, Back-end (Compiler)

Q-CTRL$135K — $210K *
Information Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in Computer Science, Engineering, or related field
  • 5+ years of backend software development experience with Python
  • Experience with quantum hardware control systems or pulse-level programming
  • Familiarity with popular Python web frameworks like Django, Flask, or FastAPI

Responsibilities

  • Design, develop, and optimize scalable backend services in Python
  • Maintain and evolve the compiler translating OpenQASM3 + OpenPulse programs
  • Collaborate with researchers and engineers to convert experimental needs into production code
  • Conduct hands-on experiments with quantum hardware to validate systems
  • Ensure high-efficiency service communication using protocols like gRPC, GraphQL, REST
  • Define software practices, tools, and design patterns for quantum control systems

Benefits

  • Annual discretionary bonuses
  • Equity opportunities
  • Benefits details available on the company career page
Full Job Description
What you'll be doing:

  • Build the backbone of quantum tech: Design, develop, and optimize scalable backend services in Python.
  • Own the compiler stack: Maintain and evolve the compiler that translates OpenQASM3 + OpenPulse programs into low-level controller instructions.
  • Bridge research and engineering: Work closely with world-class researchers and quantum engineers, translating experimental needs into production-ready code and debugging real-world execution challenges.
  • Experiment on quantum hardware: Get hands-on with QPUs, validating compiler output and controller behaviors through real device experiments.
  • Engineer for performance: Deliver high-efficiency service-to-service communication using modern protocols (gRPC, GraphQL, REST).
  • Shape the future stack: Help define the software practices, tools, and design patterns that will power the next generation of quantum control systems.
  • Other duties within the Employee's skills and experience, or with reasonable training.


Ideally you'll have:

  • Bachelor's degree in Computer Science, Engineering, or related field.
  • 5+ years of backend software development experience with Python.
  • Experience with quantum hardware control systems (or similar) or pulse-level programming (e.g., OpenQASM3, Qiskit Pulse, Qua).
  • Familiarity with popular Python web frameworks (Django, Flask, FastAPI).


It would be fantastic (but not essential) if you bring:

  • Familiarity with formal language design (e.g. LL(*) or PEG parsers) and compiler theory or ecosystems (e.g. LLVM/MLIR).
  • Experience with implementing Python extension modules with systems programming languages such as C++ or Rust for accelerating Python programs.
  • Knowledge or exposure to adjacent technologies such as FPGA programming, low-latency or real-time systems.


Salary
The base salary for this position is targeted between $135,000 - $210,000 and will ultimately be determined by specific job-related skills, experience, level, location and other contributing factors. Depending on the position offered, this role may be eligible for annual discretionary bonuses, equity and other forms of compensation outside of the targeted range. For more information on benefits at Q-CTRL, please visit our careers page at https://q-ctrl.com/careers.

Should you have any questions related to the compensation package, please speak directly with the Talent Acquisition representative.

About Q-CTRL

Q-CTRL is a quantum computing software company that provides solutions to improve the performance and reliability of quantum computers. They use advanced control engineering techniques to reduce errors and improve the stability of quantum systems. Q-CTRL has a team of experts in various fields including physics, engineering, and computer science. They have worked with clients in various industries including finance, aerospace, and defense. Q-CTRL is based in Sydney, Australia.
Learn more about Q-CTRL
Size
20 employees
Industry
Founded
2017

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