> Markdown version of [/jobs/ext/1265052-software-engineer](https://www.wearedevelopers.com/jobs/ext/1265052-software-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer - **Company:** _* Sirius - **Location:** Portsmouth, NH, United States (Remote available) - **Contract:** Permanent contract - **Skills:** Microsoft Word, Microsoft Excel, Software Applications, C++ (Programming Language), Python (Programming Language), Microsoft Office, Language Modeling, Microsoft PowerPoint, Digital Twin, SC Clearance, Unreal Engine, Programming Languages - **Published:** July 14, 2026 - **Apply:** https://arc.dev/remote-jobs/j/redirect/p4905va9c6 ## About the Role We are seeking a Software Engineer who combines strong technical skills with problem-solving ability and effective communication. You will work independently or as part of small teams, helping Sirius Digital grow while advancing your own expertise. We offer a competitive benefits package and clear opportunities for rapid career progression., * 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. * 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 Desirable: * Background working with Defence Digital, DE&S, Dstl, Frontline Commands, or the UK Defence industry * Degree in a STEM or computing discipline, or equivalent experience * Proficiency with MS Office (Excel, PowerPoint, Word) ## Description * 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, * Mentoring, internal and external training, and access to sector specialists and online learning * Comprehensive benefits including a 7% pension contribution, private healthcare, life assurance, additional holiday purchase options, and an electric vehicle scheme Other Requirements: * Candidates must have an existing right to live and work in the UK. * Candidates will need to undergo an internal BPSS check prior to gaining site access. * Candidates will also need to either be willing and eligible or to undergo a Security Clearance check (SC level) or hold a current SC clearance upon starting their employment with the company. 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