Software Engineer

Salary: £30,000 - 60,000 per year

Requirements:

• Experience designing and delivering performant software applications, ideally within a technical consultancy environment
• Knowledge of software modelling and simulation techniques
• Ability to analyse requirements and define technical specifications
• Experience in one or more of the following: videogame engine technology (e.g., Unreal Engine, Godot), entity or event-based simulation, robotics, and autonomous systems
• Proficiency in C/C++, familiarity with Python, C#, Zig
• Willingness to learn new technologies and programming languages
• Ability to apply mathematical or statistical methods to scientific or applied challenges
• Confidence working with large codebases and understanding hardware/performance constraints
• Strong interpersonal skills for client and stakeholder engagement
• Experience preparing technical reports and presenting to customers
• Willingness to travel within the UK and work on client sites as required
• Background working with Defence Digital, DE&S, Dstl, Frontline Commands, or the UK Defence industry (desirable)
• Degree in a STEM or computing discipline, or equivalent experience (desirable)
• Proficiency with MS Office (Excel, PowerPoint, Word) (desirable)

Responsibilities:

• Deliver technical consultancy projects to a high standard
• Develop and implement software solutions across areas such as wargaming, simulation, autonomous systems, digital twins, and synthetic environments
• Build and sustain strong client relationships
• Apply mathematical and computational techniques to solve real-world problems, developing innovative approaches as needed

Technologies:

• AI
• C#
• Excel
• Hardware
• Python
• Robotics
• Unreal
• GameDev
• C++
• Security

More:

At Sirius Digital, we are a trusted provider of expertise in Software Engineering, Data Science, and AI, supporting clients in the defence, nuclear, space, and energy sectors. We specialize in software modelling and simulation, robotics and autonomous systems, and data science and engineering, delivering technical consultancy and innovative solutions. We offer a competitive benefits package including a 7% pension contribution, private healthcare, life assurance, and additional holiday purchase options. With clear opportunities for rapid career progression, we encourage you to join our dynamic team in Portsmouth with a hybrid working model.

last updated 31 week of 2026