Quantum Software Engineer - Algorithms & Applications

ABOUT INFLEQTIONInfleqtion is a pioneering global leader in quantum technology, dedicated to addressing some of the most complex challenges facing the world today. By leveraging the principles of quantum mechanics, we design and integrate advanced quantum computers, sensors, and networks. Our innovative approach spans from foundational physics to cutting-edg…

ABOUT THE COMPANYInfleqtion is a pioneering global leader in quantum technology, dedicated to tackling some of the world's most pressing challenges. We leverage the principles of quantum mechanics to develop and integrate cutting-edge quantum computers, sensors, and networks. From groundbreaking physics to advanced commercial solutions, Infleqtion is committed to making quantum technology ubiquitous through our innovative ecosystem of devices and platforms. Our mission is to revolutionize atom-based quantum products, delivering significant enhancements in performance and computational capabilities.LOCATIONThis full-time position is based in our Kidlington and Harwell offices in the United Kingdom. We offer a flexible working policy that allows employees to work up to 2 days a week from home, as work permits.POSITION SUMMARYWe are looking for a Quantum Error Correction Specialist to join our team. This role focuses on the design, analysis, and implementation of fault-tolerant architectures to facilitate scalable, high-fidelity quantum computation. You will create and assess error-correcting codes, decoding algorithms, and fault-tolerant gate constructions specifically for our hardware platforms, transforming theoretical QEC frameworks into practical protocols. Close collaboration with hardware, control, and compiler teams will be essential to model noise processes, enhance syndrome extraction and decoding performance, and establish logical performance metrics that guide system design. The ideal candidate will possess deep expertise in quantum information theory and fault tolerance, alongside robust analytical and simulation skills, effectively bridging theory and practice to elevate the reliability and scalability of next-generation quantum systems.JOB RESPONSIBILITIESPursue advanced research in QEC theory, techniques, and their application in experimental quantum computing.Develop and enhance QEC protocols tailored for experimental gate-based quantum computing, focusing on neutral atom platforms.Utilize mathematical models and numerical simulations to evaluate the behavior and performance of QEC protocols.Design and implement custom QEC decoders.Contribute to identifying and mitigating noise processes in quantum systems.Collaborate with experimental physicists and software engineers to connect theoretical concepts with practical execution.Effectively communicate and interpret cutting-edge research in both theoretical and experimental contexts with colleagues.

ABOUT INFLEQTIONInfleqtion is a pioneering global leader in quantum technology dedicated to addressing the world's most pressing challenges. By leveraging the principles of quantum mechanics, we develop and integrate cutting-edge quantum computers, sensors, and networks. Our commitment to innovation spans from fundamental physics to advanced commercial products, enabling a future where 'quantum is everywhere' through our comprehensive ecosystem of devices and platforms. Our mission is to bring atom-based quantum products to market that deliver unprecedented enhancements in performance and computational capabilities.WORKING LOCATIONWe operate offices in the USA, the United Kingdom, and Australia. This is a full-time position based in our Kidlington and Harwell offices. Our flexible work policy allows full-time employees to work remotely up to 2 days a week, subject to operational needs.POSITION OVERVIEWWe are on the lookout for a Senior Research Software Engineer who will play a crucial role in designing and developing software across the entire quantum control stack, facilitating the high-performance operation of our quantum computing and sensing technologies. This position encompasses low-level hardware integration, real-time control systems, waveform generation, calibration automation, experiment orchestration, and scalable data pipelines. You will collaborate closely with physicists and hardware engineers to transform experimental needs into robust, deterministic, and extensible control frameworks. The ideal candidate will possess extensive systems programming expertise, experience with hardware-adjacent or real-time systems, and a solid foundation in scientific or high-performance computing, along with a fervor for creating the core software that powers next-generation quantum innovations.KEY RESPONSIBILITIESDesign, develop, and implement reliable, maintainable, scalable, and fault-tolerant backend services and frameworks for controlling and calibrating our quantum hardware.Collaborate with multidisciplinary teams, including scientists, opto-mechanical engineers, and electrical engineers, to tackle complex challenges and deliver top-quality software solutions.Empower teams by imparting engineering and programming best practices, enabling them to create the tools they need.Mentor and support junior engineers, nurturing their professional development and enhancing the overall technical capabilities of the team.Lead code and design reviews, promoting engineering best practices and fostering a culture of quality and collaboration.Provide support and troubleshoot all layers of the control stack, from real-time embedded kernels to distributed and cloud-based services.

About InfleqtionInfleqtion is at the forefront of quantum technologies, specializing in advanced solutions for sensing, positioning, timing, and quantum computing. Our innovative technologies cater to a diverse range of clients, including commercial enterprises, critical infrastructure operators, and government agencies worldwide.LocationThis full-time position is based in Kidlington, Oxford (Hybrid, with travel across the UK and Europe). Our flexible work policy allows employees to work from home for up to two days a week, depending on business needs.Position OverviewWe are looking for a dynamic and commercially-focused Business Development Manager to drive growth in the UK and European markets, particularly in sectors related to commercial and government applications such as telecommunications, space, energy, infrastructure, transport, and dual-use technologies. The ideal candidate will be a proactive sales professional with a passion for technology and a proven track record in scaling emerging technologies within real-world applications.Key ResponsibilitiesIdentify, cultivate, and secure new business opportunities in target sectors where quantum-enabled solutions can provide a competitive advantage.Collaborate with technical and product teams to convert complex capabilities into compelling value propositions for commercial operators and government clients.Manage the development of early-stage opportunities through to contract negotiation and award.Contribute to the creation of bids and proposals, pricing strategies, and commercial frameworks.Build and maintain a robust sales pipeline aligned with revenue goals.Represent Infleqtion at industry events, trade shows, and customer engagements.Provide valuable market insights to inform product development and market entry strategies.

Infleqtion is seeking a Senior AMO Physicist to join its neutral atom quantum computing team in the UK. This full-time role is based at the Kidlington, Oxford office and the National Quantum Computing Centre in Harwell, with the option to work from home up to two days per week (subject to business needs and manager approval). Role overview This position centers on hands-on research within the expanding UK Physics Department. The Senior AMO Physicist will support ongoing projects and investigate new concepts for future quantum computing systems. Collaboration with physicists and engineers is a key part of the work. What you will do Project support Translate product requirements into atomic system designs. Model, simulate, and perform analytical calculations to verify system performance. Design and carry out testing and verification plans. Integrate opto-mechanical systems, electronics, and software into quantum devices. Manage technical tasks such as equipment setup and system demonstrations. Identify materials and components for each project. Document progress and track, resolve, and report project issues. Team collaboration Work closely with colleagues to meet project deadlines. Engage with multidisciplinary teams to develop commercial and non-commercial products or draft new quantum-focused initiatives. Adapt to changing project priorities as technology advances. Embrace new methods, integrate feedback, and collaborate with diverse teams to manage uncertainty. Assess complex scenarios and make informed decisions in ambiguous situations.

ABOUT INFLEQTIONInfleqtion is a pioneering global leader in quantum technology, specializing in delivering state-of-the-art sensing, precision timing, and quantum computing solutions to both government and commercial sectors. Our innovations significantly enhance navigation, positioning, communications, quantum information processing, and sensing capabilities across critical markets, including defence, space, and infrastructure.As we expand our team in the UK, we are on the lookout for an ambitious Business Development Manager who is eager to elevate our presence within the government defence and space arenas, such as the MOD, UK Space Command, NATO, and leading prime contractors. Initially focusing on the UK domestic market, this role will also encompass responsibilities across Europe as we continue to grow our footprint in the region.This opportunity is perfect for a commercially savvy individual with a background in the defence and/or space sectors who seeks to thrive in a high-growth, deep-tech environment and advance their career in advanced technology sales.LOCATIONInfleqtion boasts offices in the USA, United Kingdom, and Australia. This is a full-time position based in Kidlington, Oxford (Hybrid, involving UK and international travel). Our flexible working policy allows full-time employees to work up to 2 days a week from home as work permits.POSITION SUMMARYIn this role, you will spearhead business development initiatives across defence and space accounts, focusing on identifying opportunities, cultivating relationships, and transforming early-stage engagements into funded projects and sales. This position covers various domains, including land, maritime, air, cyber, and space, and is relevant to sovereign capability programmes. You will gain significant exposure to strategic customers and executive leadership, providing a solid foundation for advancement into senior business development roles.