March 5, 2024

We are looking for a driven Mechanical Design Engineer

Do you want to contribute to the development of a new energy technology that can safely turn nuclear waste into emission-free energy?   Are you excited about working in a hands-on deep tech start-up team that aims to make a huge impact? Do you like complex challenges? Then, we might be just the company you are looking for!

Your mission.

As Mechanical Design Engineer, you will support the design of critical components and systems of the Thorizon reactor. You will work closely together with our systems engineers as well as a larger team of functional experts in the development and building of those critical parts. In this role you will create 3D drawings based on system requirements as well as the input of the team. Using your experience you will test and validate feasibility, performance and manufacturability of the component or system. You will challenge the team when you see issues or areas of improvement and jointly think towards solutions to make sure the component – and in the end the overall Thorizon reactor – is designed in a commercially viable way. This role is based in Amsterdam or Lyon.

In this role you will:

  • Work together with a larger team of system engineers and functional experts to progress the Thorizon reactor design
  • In this role you will design components and (sub)systems based on system requirements as well as the input of the team, and generate 3D models and drawings.
  • Pressure test the design to validate feasibility, performance and manufacturability of the end product
  • Be a link between designs on paper and practical execution (developing, building) of the Thorizon reactor
  • Challenge the rest of the team when you foresee potential issues in the current design and be proactive and constructive in proposing solutions for those issues
  • Report to the lead Mechanical Engineering. Day to day work is cross-functiona

About you.

  • You have a degree in (Mechanical) Engineering, either Masters or Bachelor/vocational education.
  • You have 10+ years of experience in systems or equipment design in a technically complex setting (experience in the nuclear sector is not required, interest in the sector is).
  • You have a pragmatic and constructive mindset – you find ways to get things done even if they seem very challenging from the start.
  • You preferably have experience in the design of systems dealing with high temperatures or other extreme conditions.
  • You preferably have experience in the design of process equipment.
  • You solve problems creatively and know when and how to involve other team members.
  • You are eager to learn and like a new challenge.
  • You are a team player, you like to be part of a larger project team for your day-to-day activities.
  • You are an excellent communicator in English and either French or Dutch, both spoken and written.
  • You are a hands-on self-starter who likes to work in a multicultural and dynamic environment that is growing fast.
  • You like working in an agile manner and are comfortable with the fast-moving pace of a technological scale-up.
  • You have an intrinsic motivation to make an impact and want to contribute to a responsible energy supply.

What can you expect from us?

  • A dynamic and ambitious team of nuclear technology professionals who are committed to solving today’s energy challenges.
  • A unique experience in a fast-growing VC-backed deep tech start-up
  • Opportunity to work on a game-changing technology that reduces our carbon footprint and nuclear waste streams.
  • Competitive salary and an employee profit-sharing plan
  • International work experience
  • Office in the heart of Amsterdam or Lyon next to the Central station, including start-up vibes, office amenities, Thursday drinks and quarterly team events.

Does this sound like a match? We are looking forward to your application!
Please email

Thorizon takes responsibility to make our company more inclusive. We need all ideas to realize our mission and want everyone to feel home in our team.

About Thorizon.

Thorizon is a developer of nuclear power solutions. The company designs and creates frontier technology for Molten Salt Reactors (MSR). Thorizon’s purpose is to accelerate the availability of clean energy and help solve the climate crisis.

Thorizon’s reactor design:

  • Generates emission-free energy on demand.
  • Reduces nuclear waste streams by using it as fuel in combination with the abundant metal Thorium.
  • Provides electricity or high-temperature heat for use in industrial processes, such as hydrogen production.

We currently have a team of ~18 in Amsterdam and are hiring a similar-sized team in Lyon. We are in the development phase and aim to solidify our design through analyses, experiments, simulations, and partnerships. At Thorizon, we believe a strongly coupled multidisciplinary technology development requires a culture of full openness and transparency. We therefore foster integrity, honesty, collaboration, team spirit, and responsibility.