Compiler Engineer – Quantum Software

Job Description

Job Title: Principal Compiler Engineer – Quantum Software. Location: Tokyo, Japan

Job Type: Full-time, On-site

Responsibilities:

• Design, implement, and improve compiler infrastructure for quantum-classical programming workflows
• Develop language front ends, type systems, intermediate representations, optimization passes, runtime interfaces, and backend integrations
• Build production-quality software primarily in Python and Rust
• Define and implement multi-level compiler architectures connecting programming languages, quantum circuits, runtime systems, and execution targets
• Analyze compiler performance, identify bottlenecks, and improve scalability for hybrid quantum-classical applications
• Help shape compiler architecture to ensure maintainability, extensibility, and long-term scalability;
• Collaborate with compiler teams in the UK and USA, with occasional international travel
• Partner with scientific, engineering, and product teams to transform research into production-ready software
• Lead complex software projects from architecture and planning through implementation, testing, documentation, and delivery
• Mentor junior and mid-level engineers through design reviews, code reviews, and technical guidance;
• Establish software engineering standards and compiler development best practices
• Contribute to research publications, technical papers, conference submissions, and external collaborations where appropriate

Qualifications:

• Master's degree or PhD in Computer Science, Physics, Electrical Engineering, Mathematics, or a related technical field, or equivalent professional experience
• 10+ years of professional software engineering experience, including extensive compiler or programming language development
• Strong programming skills in Python and Rust, or deep expertise in one with the ability to work professionally in both
• Experience with compiler implementation, including parsing, semantic analysis, type systems, intermediate representations, optimization, lowering, code generation, runtime integration, or program transformation;
• Strong understanding of programming language design, especially functional programming concepts and type systems
• Experience leading technically complex software projects in research or advanced engineering environments
• Ability to develop software from research prototypes to production-ready systems
• Excellent communication and collaboration skills across engineering, scientific, product, and leadership teams
• Experience mentoring engineers and improving technical standards

Preferred:

• Experience with quantum computing, quantum programming languages, quantum circuit compilation, or hybrid quantum-classical workflows
• Experience with MLIR, LLVM, or similar compiler infrastructures
• Experience designing domain-specific languages or advanced type systems
• Background in functional programming languages such as Haskell, OCaml, F#, Scala, or Rust
• Experience with compiler correctness, formal methods, static analysis, or program verification
• Contributions to research publications, patents, or open-source projects;
• Experience working with globally distributed engineering teams
• Experience in high-performance computing, distributed systems, scientific software, or developer platforms

Benefits And Compensation:

• Opportunity to build cutting-edge quantum software and compiler technology
• Work alongside international compiler, software, and quantum research teams
• Participate in research collaborations and technical publications
• International collaboration with teams across Japan, the UK, and the USA

Other Information:

• This is a senior individual contributor role with technical leadership responsibilities
• Some international travel is expected
• AI tools may be used during parts of the recruitment process, while final hiring decisions are made by humans