Scientific Software Developer




Years of experience

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newcleo is a clean and safe nuclear technology company. Privately funded and headquartered in London, UK, newcleo was launched in 2021 to be a disruptor in the field of nuclear energy. Its mission is to generate safe, clean, economic and inexhaustible energy for the world, through a radically innovative combination of existing, accessible technologies.

newcleo is building the next generation system with the goals to:

  1. eliminate the need for geological repositories by using a fast neutron flux avoiding the production of long life radioactive elements;
  2. accelerate the development of new fuel cycles, including MOX (Mixed Pu-U Oxides) and eventually thorium, that provide clean, safe and inexhaustible energy from nuclei and the opportunity to burn the long-lived nuclear waste produced by the old generation of nuclear reactors;
  3. ultimately develop an Accelerator Driven System (ADS), based on the intrinsically safe coupling of a particle accelerator and a sub-critical reactor.

With visionary co-founders, newcleo brings together an international team of senior engineers with deep knowledge of nuclear energy and new recruits with a fresh mindset, working to develop designs based on innovative Lead-cooled Fast Reactors (LFRs). These LFRs will meet the commercial demand for small terrestrial waste-to-energy reactors.

In the UK, newcleo’s immediate focus is on delivering a prototype 30MWe LFR by 2030 followed by an initial battery of 4-6 x 200MWe reactors with deployment in the early 2030s. We are building our team to meet this challenging and exciting objective.

newcleo wants to be the first step toward the evolution of its industry to become fully respectful of people and the environment. To develop a new, sustainable, and completely safe way of generating nuclear energy that will lead humanity to zero emissions, and to the mitigation of global warming.

Reports to (Job Title):

R&D Manager – Codes & Methods

Job Description

To collaborate to the planning, design and development of new and existing computer codes used for the calculation of lead-cooled fast nuclear reactors. The Developer will work directly on the solution methods and on the numerical implementation proposing advanced solutions to achieve high-performance computing. The role of this position contributes to the company’s objectives in the field of advanced reactor physics and methods.

Main Activities

  • Participate in individual and collaborative research projects and support new research programs 
  • Deploying, tuning, and performance optimization of complex software 
  • Testing and benchmarking of new code components and algorithms 
  • Reverse engineering for algorithm comprehension and code refactoring of legacy code 
  • Research on advanced numerical algorithms for high-performance computing 
  • Scientific communication and participation to international meetings  

Key Performance Indicators

Timely management of key deliverables and tasks respecting deadlines with high quality output. 

Ideal Background


Master’s Degree in Mathematical Sciences, Computational 

Physics and Informatics, or Nuclear Engineering 

PhD is requested for this position 


Fluent English, with Italian or French as optional languages

Experience / Professional requirements

  • proficiency in C/C++, FORTRAN, and Python programming on posix-compliant OS 
  • knowledge of computational techniques, numerical methods, and data analysis 
  • knowledge of machine learning and artificial intelligence (optional) 
  • experience with software Verification and Validation (V&V) approaches 
  • analytical and problem-solving skills 
  • demonstrated skills in scientific and technical editing by LaTeX 
Apply now

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