Job Description

Software Engineer (Reactor Physics) - Submarines

Full Time

Raynesway, Derby

Why join Rolls-Royce?

At Rolls-Royce we are proud to be a business that has truly helped to shape the modern world and are committed to always being a force for progress; powering, protecting and connecting people everywhere.

By joining Rolls-Royce, you'll have the opportunity to work on world-class solutions, supported by a culture that believes individuality is our greatest strength, and all perspectives, experiences and backgrounds help us innovate and enable our high-performance culture.

We are looking to recruit Software Engineer (Reactor Physics) to join our expanding team. You will develop analytical software and tools to support the design, manufacture and operation of nuclear power plants for the Royal Navy. You’ll be creating advanced software used by a range of teams to simulate and analyse complex physical processes within the nuclear reactor core. This software will be a vital tool to help scientists and engineers solve problems quicker and make more informed decisions.

You will be creating advanced software used by a range of teams to simulate and analyse complex physical processes within the nuclear reactor core. This software will be a vital tool to help scientists and engineers solve problems quicker and make more informed decisions. Within the software team there are opportunities to develop your career in technical management and team leadership or as a technical specialist. The team offers the opportunity to become an expert in the use of state-of-the-art toolsets.

What you will be doing:

Our core analytical software tools are written in a combination of Fortran and C++. For supporting tools and utilities we develop primarily in Python, taking advantage of the scientific ecosystem to solve a range of engineering problems. We control all our software using Git and Azure DevOps. Although experience in this full tech stack is desirable, we are more interested in your eagerness to learn and encourage applications from all development backgrounds.

• Developing analytical software and tools to support the design, manufacture and operation of nuclear power plants for the Royal Navy.
• Creating advanced software used by a range of teams to simulate and analyse complex physical processes within the nuclear reactor core
• Working with a range of customers from diverse analytical disciplines to elicit requirements and translate them to traceable code.
• Maintain software quality and integrity by rigorously testing and fixing bugs throughout the development and upkeep process.
• Create software solutions that enable engineers, technical experts, and Rolls-Royce’s customers to derive data-driven insights, enhancing decision-making processes.

Position Qualifications

• Experience in at least one of Python, Fortran and C++.
• Experience developing/supporting high quality code that is interpretable, documented and tested.
• A delivery focussed mindset, able to make decisions that make the best compromises between complexity and shipping value.
• Strong communications skills, capable deliver presentations, reports and conducting meetings with internal and external stakeholders at all levels
• You will have a numerate, degree level, education (Computer Science, Mathematics, Physics, Engineering) or equivalent experience

To work for Rolls-Royce Submarines you need to hold a Security Check (SC) clearance without any caveats to that clearance. Rolls-Royce will support the application for Security Clearance if you don’t currently already have this in place.

Due to the nature of work the business conducts and the protection of certain assets, you must hold a UK nationality. Any dual nationals will require additional scrutiny and background checks prior to commencing work with RRSL.

Our vision is to ensure that the excellence and ingenuity that shaped our history continues into our future. Our multi-year transformation programme aims to turn Rolls-Royce into a high-performing, competitive, resilient and growing company. Join us, and it can be your future vision too.

Rolls-Royce are committed to being a respectful, inclusive, and non-discriminatory workplace where individuality is valued, diverse perspectives fuel innovation, and everyone can thrive.

Please be aware that the priority will be given to employees identified as being at high risk. The professional level and salary of the position will be dependent on the skills and experience of the successful candidate

This job is advertised at the grades shown, and this is the desired operating level for this role. We encourage applications from candidates with relevant experience from any grade.

It is advised that you inform your current manager of your application for this role.

Grade: 7-10

Job Category

Software Systems

Posting Date

03 Sept 2026; 00:09

Posting End Date

07 Sept 2026