Senior Researcher Fault-Tolerant Quantum Computing

Location: Cologne, Germany

31 Mar 2026

We are seeking Senior Researchers in Fault-Tolerant Quantum Computing to contribute to the development of key components of the fault-tolerant stack. These roles focus on decoders and quantum algorithms at the logical level, addressing how quantum information can be processed reliably in large-scale, error-corrected systems. The positions involve developing and analyzing decoding strategies under realistic noise models, as well as designing and evaluating quantum algorithms within fault-tolerant architectures, including resource estimation and logical-level optimization. The emphasis is on rigorous, hands-on research that advances the performance, scalability, and understanding of error-corrected quantum computation. A central aspect of the role is contributing to the integration of these methods into modular fault-tolerant architectures, ensuring consistency between algorithmic, decoding, and system-level considerations.

Company Overview

neQxt is a trailblazing company at the forefront of quantum computing technology. With decades of expertise in ion-trap technology, neQxt was founded at Johannes Gutenberg University Mainz, Germany, emerging from the renowned research group of Prof. Dr. Ferdinand Schmidt-Kaler.

At neQxt, our theory team explores the principles that make scalable quantum computing possible. We study how fault tolerance can be realized under realistic conditions, designing circuits, developing simulation methods, and analyzing noise at the circuit level. A key part of our work is to understand trade-offs between different approaches and how they can be embedded into modular architectures. We aim to connect theoretical insights with practical feasibility, developing techniques that move fault tolerance closer to realization. By building tools, models, and architectures, we provide a bridge between abstract principles and the requirements of physical quantum processors.

Position Overview

We are seeking Senior Researchers in Fault-Tolerant Quantum Computing to contribute to the development of key components of the fault-tolerant stack. These roles focus on decoders and quantum algorithms at the logical level, addressing how quantum information can be processed reliably in large-scale, error-corrected systems. The positions involve developing and analyzing decoding strategies under realistic noise models, as well as designing and evaluating quantum algorithms within fault-tolerant architectures, including resource estimation and logical-level optimization. The emphasis is on rigorous, hands-on research that advances the performance, scalability, and understanding of error-corrected quantum computation. A central aspect of the role is contributing to the integration of these methods into modular fault-tolerant architectures, ensuring consistency between algorithmic, decoding, and system-level considerations.

Qualifications

1. Education: A PhD in Physics, Computer Science, Mathematics, Electrical Engineering, or a related field is required. Specializations in quantum information, quantum error correction, or quantum algorithms are highly preferred.

2. Specializations: Expertise in one or more of the following areas:

• Decoding of Quantum Error Correcting Codes, including development and analysis of decoding algorithms under realistic noise models
• Fault-Tolerant Quantum Algorithms, including logical-level circuit design, resource estimation, and compilation within error-corrected architectures
• Theoretical and numerical methods for analyzing fault-tolerant systems at scale
• Software development for simulation and evaluation of quantum computing architectures

3. Experience:

• Demonstrated expertise in quantum error correction (with a focus on decoding or fault-tolerant quantum algorithms), supported by a strong publication record or impactful software contributions.
• Ability to work independently on technically demanding problems and to contribute to complex research efforts in fault-tolerant quantum computing.

Key Responsibilities

• Conduct research on decoding QEC codes under circuit-level noise or fault-tolerant quantum algorithms, with a focus on performance, scalability, and theoretical understanding.
• Develop, analyze, and benchmark decoding methods or logical-level algorithmic approaches within fault-tolerant architectures.
• Contribute to the development of models, tools, and methods for analyzing large-scale, error-corrected quantum systems.
• Work closely with other researchers to integrate results into broader architectural and simulation frameworks.
• Produce high-quality research outcomes, including publications, software tools, and technical reports.
• Track and incorporate relevant advances in fault-tolerant quantum computing into ongoing work.

Our Offer

• Permanent Position: A long-term role with the opportunity to contribute continuously to the development of fault-tolerant quantum computing within a focused research environment.
• High-Impact Projects: Work on meaningful, transformative challenges that push the boundaries of quantum technology.
• Collaborative Environment: Join a team of passionate experts dedicated to advancing quantum computing through shared knowledge and mentorship. Publish and present our work at international workshops and conferences.
• Flexible Work Arrangements: Enjoy a supportive and adaptable work environment designed to help you achieve your best results.

Ideal Candidates

We are looking for researchers with a strong technical focus and a deep interest in fault-tolerant quantum computing. You should be comfortable working on mathematically and computationally demanding problems, and motivated to develop methods that directly impact the performance and scalability of error-corrected quantum systems. Candidates should bring clear expertise in either QECC decoders or fault-tolerant quantum algorithms, and be interested in how these components fit into a coherent fault-tolerant framework. A strong inclination toward rigorous analysis, quantitative evaluation, and the development of practical methods is essential. This role is well suited for individuals who prefer hands-on research, enjoy working through concrete technical challenges, and want to contribute directly to the core mechanisms that enable large-scale quantum computation.

Application Process

To apply, please submit your CV, a cover letter including your preferred starting date, and any relevant publications or project details. Applications will be reviewed on a rolling basis until positions are filled. Join us at neQxt and help shape the architectures and methods that will enable practical, fault-tolerant quantum computation.

Contact

Dr. Sascha Heußen, s.heussen@neqxt.org