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Phasecraft is recruiting a Quantum Software Researcher - Optimisation

Quantum Software Researcher – Optimisation

Phasecraft is the quantum algorithms company. We are building the mathematical foundations for quantum computing applications that solve real-world problems. Founded in 2019 by Toby Cubitt, Ashley Montanaro and John Morton, we are based in London and Bristol. In 2020 we completed a record £3.7m seed round for a quantum computing company in the UK, led by VC firm LocalGlobe.

Phasecraft’s unprecedented access to today’s best quantum computers – through partnerships with Google, IBM, and Rigetti – provides us with unique opportunities to develop foundational IP, inform the development of next-generation quantum hardware, and accelerate commercialisation of high-value breakthroughs. 

We are looking to hire a Quantum Software Researcher to join our team. The ideal candidate will have experience in the theory and/or implementation of optimisation algorithms for gate-model quantum computers, or in classical optimisation or constraint satisfaction algorithms; or otherwise strong evidence of potential to contribute to these areas. Their work will initially focus on these topics, though they will have the opportunity to grow a portfolio of research activity across the breadth of Phasecraft’s interests. A background in quantum computing is not necessarily required, though in this case a successful candidate will have evidence of the ability to design and/or implement advanced algorithms for optimisation and/or constraint satisfaction.

Job Description

  • Undertake theoretical and/or applied research and/or software development for near-term quantum computing applications, with an initial focus on quantum algorithms and software for combinatorial optimisation and constraint satisfaction problems
  • Help to author publications, presentations, patent applications and similar resulting from the research
  • Work collaboratively in a small team made up of full-time staff and affiliated PhD students
  • Other activities as required to support the growth and success of Phasecraft

Location: Bristol

Skills, Qualifications and Experience

Essential criteria:

  • Expertise in one or more of:
    o   quantum information and/or computation theory
    o   theory and/or implementation of classical algorithms for optimisation or constraint satisfaction
    o   quantum algorithm design and/or implementation
    o   mathematical analysis of algorithms
  • Ability to work independently on research projects and to work in a team
  • Flexibility to work across different aspects of quantum software and underpinning theory
  • Flexibility to work on other tasks required to support the growth and success of the company

Desirable criteria:

  • PhD (or soon to receive one) in quantum information, quantum computation theory, theoretical computer science, or closely related field
  • Coding in quantum software development environments (e.g. Cirq, QuEST, Qiskit)
  • Experience of implementing algorithms on quantum hardware
  • Strong publication track-record in relevant discipline
  • Software development skills
  • Enthusiasm for learning and novel research
  • Excellent communication skills

How to apply:

To apply, please send a CV, including details of two referees, and covering letter by email to

For any enquiries, please contact Ashley Montanaro at