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The fusion era is here—and a new industry is taking shape.
As Japan’s first fusion energy startup, Kyoto Fusioneering is proud to help lead the global push toward a cleaner, more sustainable future. We combine cutting-edge technologies—built on decades of scientific research—with the unmatched quality of Japanese manufacturing to accelerate the development of this next-generation energy source.

Together, we’re building a "sun on Earth."

Join us in shaping the future of clean energy!

Current Openings

Plant Technology Group

  • Engineer
    (KFEU, Germany-based)
Job Title Engineer (KFEU, Germany-based)
Job summary We are recruiting a talented and motivated engineer to join our growing fuel cycle team. This role sits at the intersection of mechanical design, process engineering, and fusion technology development. You will contribute to the design, modelling, and qualification of key components and systems for commercial fusion power plants, working across the full development lifecycle from concept to prototype. We welcome candidates from mechanical engineering, process/chemical engineering, or related disciplines — what unites all profiles is a rigorous engineering mindset and a drive to solve difficult problems in an emerging industry. If you feel you cannot cover all elements of the job description, please mention in detail which you think you address best.
Job description You will develop and review detailed mechanical designs of fusion fuel cycle components using CAD tools, as well as produce and maintain engineering drawings, bills of materials, and technical specifications to applicable industrial standards.
In the area of modelling and simulation you develop and run process simulations and system models (steady-state and transient) for fusion fuel cycle systems including tritium processing units. You perform structural or flow analyses to validate designs and support qualification programs.
Furthermore, you prepare and review qualification documentation, test plans, and technical reports, and engage with suppliers and external test facilities to support manufacturing and testing campaigns.
Essential requirements ・Bachelor’s or Master’s degree in a related science/engineering discipline
・Minimum 3 years of relevant professional experience
・Proven experience in 3D CAD design and engineering drawing production (CATIA, SolidWorks, Inventor, or equivalent)
・Solid understanding of design-for-manufacture
・Experience in process design and P&ID development
・Understanding of chemical engineering unit operations, their design and dimensioning basis
・Curiosity about new technologies and diverse industry knowledge with a proactive approach to learning
・Advanced proficiency in Microsoft products (Excel, Word, PowerPoint, etc.)
Desirable requirements ・Experience in instrumentation and control (I&C) engineering, including sensor selection, control logic design, PLC programming
・Familiarity with nuclear or fusion-relevant design qualification processes
・Knowledge of tritium fuel cycle systems
・Experience in process simulation tools (ASPEN and similar)
・Ability to develop and validate system models
・Experience with FEA tools (ANSYS) or CFD (FLUENT, OpenFOAM)
・Experience with project management tools and methodologies in an engineering context
Working environment We offer a dynamic and inclusive working environment that fosters creativity and innovation. We are committed to work-life balance and offer flexible working hours to support our employees' well-being.
Employment type Full-time employee or Fixed-term employee
Salary Salary to be determined based on experience and qualifications, in line with company policy.
Location KFEU Office at Karlsruhe, Germany
*The position requires on-site work at our office.
Working hours Flexible working hours depending on business needs (~8 AM to 5 PM)
Holidays 30 days of annual paid leave, Saturdays, Sundays and national holidays
Benefits and welfare Career development opportunities, including self-development budget
Entry for this job

Business Development

  • Project Manager
    (KFEU, Germany-based)
Job Title Project Manager (KFEU, Germany-based)
Job summary We are recruiting a Project Manager that will support the execution of strategic and technical projects for KF in Europe’s fusion energy sector.

Based in Karlsruhe, you will manage multiple projects, ensuring timeline, budget and quality requirements are met. Through effective management of all project stakeholders, you will also make sure that scope and budget creep are minimised, and information is shared in an effective and timely manner. By applying project management methodologies, you will ensure that project outcomes support our organisational goals, deliver value to our customers and drive continuous improvement.
Job description You will be engaged in leading and managing engineering projects in the fusion sector, ensuring on-time and on-budget delivery while meeting quality and safety standards. After fully understanding project final goals including key design requirements, you will develop and maintain comprehensive project plans, including scope of work, schedules, resource allocation, risk management and budget forecasting.

In addition, you will prepare project reports and presentations and act as the single point of contact between the client and supply chain. You will collaborate with internal teams, including design, manufacturing and quality assurance, manage the relationship with key partners and suppliers and ensure that KF's quality management approach is adhered to within the supply chain. Besides co-ordinating with engineering teams to ensure designs meet all required safety and regulatory standards, you will act as the primary point of contact for project stakeholders, including clients, regulatory authorities and internal teams and create and maintain essential project management documentation such as RAID logs, deliverable register, change control etc.

As part of your work, international travel (including Japan) may be required.
Essential requirements • Bachelor’s or master’s degree in a related science/engineering discipline
• Project management experience in unique and one-of-a-kind projects such as equipment/facility development and manufacturing, or plant construction
• More than 5 years’ experience as Project Manager
• Project management knowledge based on global standards (PMBOK etc.)
• Experience in managing multiple, simultaneous projects
• Familiarity with the review (not approval) of mechanical design drawings and CAD models
• Excellent communication skills, both written and verbal, to collaborate effectively with cross-functional teams and stakeholders at all levels of an organisation from C-Suite to university professors and engineers in national research institutions
• Curiosity about new technologies and diverse industry knowledge with a proactive approach to learning
• Advanced proficiency in Microsoft products (Excel, Word etc.)
• Native German and fluent English
Desirable requirements • Experience of working overseas/foreign-affiliated company
• Experience of energy/plant engineering project management
• Experience of establishing or operating a Project Management Office
• Experience working in cross-departmental and cross-cultural teams
• PMP (Project Management Professional) certification
Working environment We offer a dynamic and inclusive working environment that fosters creativity and innovation. We are committed to work-life balance and offer flexible working hours to support our employees' well-being.
Employment type Full-time employee or Fixed-term employee
Salary Salary to be determined based on experience and qualifications, in line with company policy.
Location KFEU Office at Karlsruhe, Germany
*The position requires on-site work at our office.
Working hours Flexible working hours depending on business needs (~8 AM to 5 PM)
Holidays 30 days of annual paid leave, Saturdays, Sundays and national holidays
Benefits and welfare Career development opportunities, including self-development budget
Entry for this job

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OUR MINDSET

At the heart of our success are two things:
our people—and the way we think.
OUR CREDOS

ABOUT US

Kyoto Fusioneering’s pathway to a fusion energy future.
OUR ORIGINS
Kyoto Fusioneering’s DNA
A global effort is underway to develop fusion as a long-term energy solution for humanity in the face of a global climate crisis.
VISION & MISSION
Why Fusion Energy?
Kyoto Fusioneering’s pathway to a fusion energy future.
OUR TECHNOLOGY
World-leading Engineering & Reactor Technology
Developing advanced reactor engineering technology from Japan.