Quantum Error Correction Theorist – Simulation & Decoding

Location: Kyoto, Japan

Employment Type: Full-time

Salary: JPY 10,000,000 – 15,000,000 per year

Build the Future of Fault-Tolerant Quantum Computing

A well-funded quantum computing startup in Japan is seeking a Quantum Error Correction (QEC) Theorist specializing in simulation and decoding .

Founded by researchers from one of Japan's leading universities and backed by major venture capital and government funding, the company is developing scalable neutral-atom quantum computers with the goal of delivering a fault-tolerant prototype within the next few years.

This is an opportunity to conduct cutting-edge research while working closely with experimental physicists and engineers to bring theoretical advances into real quantum hardware.

About the Role

You will evaluate, design, and optimize quantum error correction techniques for neutral-atom quantum computers.

Working alongside hardware, software, and control systems teams, you will develop practical decoding algorithms and evaluate fault-tolerant architectures through large-scale numerical simulations.

Your research will directly contribute to the development of next-generation quantum computers.

Responsibilities

Quantum Error Correction Research

• Perform numerical simulations of quantum error correction protocols
• Evaluate and compare fault-tolerant quantum computing architectures
• Analyze QEC performance under realistic circuit-level noise
• Identify optimal QEC strategies for neutral-atom quantum computers

Decoder Development

• Design and implement practical quantum error decoders
• Develop low-latency or real-time decoding algorithms
• Collaborate with engineering teams to deploy decoders on quantum hardware

Software & Research

• Develop simulation software for fault-tolerant quantum computing
• Implement QEC protocols for neutral-atom systems
• Publish research papers and present at leading international conferences

Required Qualifications

• PhD (or equivalent research experience) in Quantum Information, Physics, Computer Science, Mathematics, or a related field
• Strong programming skills in Python, Rust, Julia, C++, or similar languages
• Experience with Git and collaborative software development
• Experience using or developing QEC software such as:
• Stim
• sinter
• PyMatching
• Experience with circuit-level noise simulation and QEC performance analysis
• Knowledge or implementation experience with decoding algorithms including:
• Belief Propagation (BP)
• Minimum Weight Perfect Matching (MWPM)
• Union-Find
• Tensor Network Decoders
• Neural Decoders
• Strong communication and collaboration skills in multidisciplinary research environments

Preferred Qualifications

• Experience collaborating with experimental quantum hardware teams
• Experience developing high-performance software for hardware systems
• Experience applying machine learning to quantum information (decoding, calibration, noise modeling, etc.)

Compensation & Benefits

• Annual salary: JPY 10M–15M
• Full-time employment
• Discretionary work system for researchers
• Standard working hours: 9:00–18:00
• Weekends and Japanese national holidays off
• Summer and year-end holidays
• Paid annual leave
• Comprehensive social insurance
• Annual health check
• Smoke-free workplace

Location

Kyoto, Japan

International applicants are welcome.

If you are passionate about Quantum Error Correction and want to help build practical fault-tolerant quantum computers in collaboration with world-class researchers and engineers, we would love to hear from you.