Senior Software Engineer, Back-end

Q-CTRL-posted 2 months ago
$135,000 - $213,000/Yr
Hybrid • Los Angeles, CA
101-250 employees
Publishing Industries
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As a Software Engineer on the Boulder Opal team, you will work with brilliant engineers and researchers to design and build a scalable, high-performance backend system while directly contributing to our quantum controller infrastructure. A key part of your role will be maintaining and evolving the compiler stack that translates OpenQASM3 + OpenPulse programs for low-level quantum controllers, bridging the gap between high-level quantum programming and physical execution on QPUs. You will collaborate with cross-functional teams, product, infrastructure, frontend, and research, ensuring end-to-end delivery of cutting-edge solutions that power our SDKs and cloud-based offerings. This role is ideal for someone passionate about backend engineering and systems-level programming, with an interest in quantum computing and scientific software.

  • Design, develop, and optimize scalable backend services in Python.
  • Maintain and evolve the compiler that translates OpenQASM3 + OpenPulse programs into low-level controller instructions.
  • Work closely with world-class researchers and quantum engineers, translating experimental needs into production-ready code and debugging real-world execution challenges.
  • Get hands-on with QPUs, validating compiler output and controller behaviors through real device experiments.
  • Deliver high-efficiency service-to-service communication using modern protocols (gRPC, GraphQL, REST).
  • Shape and enforce best practices for clean, secure, and reliable code while contributing to robust testing and documentation.
  • Help define the software practices, tools, and design patterns that will power the next generation of quantum control systems.
  • Collaborate with product, frontend, and infrastructure teams to ship integrated solutions used across Q-CTRL's products.
  • Other duties within the Employee's skills and experience, or with reasonable training.
  • Bachelor's degree in Computer Science, Engineering, or related field.
  • 3+ years of backend software development experience with Python.
  • Proven experience writing maintainable, testable code in a professional setting.
  • Proven ability to mentor junior team members and accelerate their contributions.
  • Strong collaboration and communication skills across cross-functional teams.
  • Experience with quantum hardware control systems (or similar) or pulse-level programming (e.g., OpenQASM3, Qiskit Pulse, Qua).
  • A track record of leading or mentoring in technical projects, particularly in early-stage or research and development-heavy environments.
  • Familiarity with formal language design (e.g. LL(*) or PEG parsers) and compiler theory or ecosystems (e.g. LLVM/MLIR).
  • Hands-on experience with modern APIs like gRPC, GraphQL, or REST.
  • Comfortable working with cloud platforms (AWS, GCP, Azure) and cloud infrastructure tools.
  • Knowledge of distributed systems, microservices, or database scaling techniques.
  • Familiarity with popular Python web frameworks (Django, Flask, FastAPI).
  • Experience designing efficient algorithms, statistical models, or data pipelines to process and analyze large-scale experimental datasets.
  • Experience with implementing CPython 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.
  • Knowledge or exposure to experimental quantum physics or superconducting qubit systems.
  • Flexibility: We embrace workplace flexibility so you worry more about your impact vs a rigid work schedule.
  • Attractive salary: You'll get to have the start-up impact without the start-up wages.
  • Equity: We want people to have a sense of ownership in what they do and offer the potential for equity share and annual bonuses.
  • Cash bonus: We recognize exceptional performance and impact by offering annual discretionary cash bonuses.
  • Resources: We are well funded by the world's best technology investors, letting us chase our ambitions with minimal constraints.
  • Parental support: We offer paid parental leave to support you and your loved ones.
  • Diversity: We're an equal opportunity employer and actively support initiatives like the 'Global Women in Quantum' program to help expand the quantum workforce.
  • Unique culture: You'll be surrounded by some of the world's leading physicists, engineers, product, marketing and design people (to name a few!) with a strong desire to learn and transfer knowledge.
  • Meaningful values: You'll work with an incredibly supportive team who work consistently to deliver our core values to be real, be trusted, be just and to be revered.
  • Personal development: We provide you with a personal development and wellness budget.
  • Make a dent: Last but not least you'll have the unique opportunity to help set the direction for this revolutionary technology and truly make an impact that matters!
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