Software Principal Engineer – Remote

Company: Sirius Digital
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Principal Software Engineer Negotiableplus benefits, pension (7% contribution), 25 days holiday & life insurance We are looking for principal software engineers with diverse experience. We are a small but rapidly growing consultancy, owned highly experienced and recognised practitioners in UK defence consultancy. As a Principal Software Engineer, you will play a major role in leading and developing software engineering in the Software Modelling and Simulation, autonomy and geospatial fields, along with providing key advice around innovation and new techniques to stakeholders.Take responsibility for the leadership and delivery of whole, or significant sub-components, of technical consulting projects and products. Designing, developing and delivering software solutions using a large range of techniques, including Wargames, Modelling and Simulation, Robotic and Autonomous systems, Digital Twins and Synthetic Environments. Building new relationships and maintaining current customer relationships. Principal Software Engineer: At least 10 years of experience, including designing and delivering software applications and leading teams.

We are looking for candidates who can help the company grow and can offer exciting opportunities for those with the drive to develop their own skills and those of the company. We offer competitive salaries and packages, and the opportunity for rapid advancement for the right candidates. At least 10 years experience in designing and implementing performant software applications. Apply mathematical principles or statistical approaches to solve problems in scientific or applied fields. The ideal candidate will be educated to degree level or have equivalent relevant experience. Proficient in C/C++ native development. Demonstratable experience and capability in writing proposals and coordinating bid management activity. Extensive experience with a range of software modelling and simulation techniques. Experience in using cases and project data context to determine specifications and requirements. Unreal Engine, Godot) Understand varied codebases and be confident in making changes to large projects. Understand performance and hardware constraints. Building customer and stakeholder relationships. Be willing to travel (on occasion as projects demand) and comfortable to work at client sites for periods. Experience working with Defence Digital, DE&S, Dstl, Frontline Commands or UK Defence industry.

Candidates will also need to either hold a current SC clearance or be willing and eligible to undergo a Security Clearance check (SC level) upon starting their employment with the company….

Posted: April 1st, 2026