Simulation Software Engineer

London, United KingdomPosted Apr 28, 2026
This website uses cookies to ensure you get the best experience. Hadean and our selected partners use cookies and similar technologies (together “cookies”) that are necessary to present this website, and to ensure you get the best experience of it. If you consent to it, we will also use cookies for analytics purposes. See our Cookie Policy to read more about the cookies we set. You can withdraw and manage your consent at any time, by clicking “Manage cookies” at the bottom of each website page. Accept all cookies Decline all non-necessary cookies Cookie preferences Select which cookies you accept On this site, we always set cookies that are strictly necessary, meaning they are necessary for the site to function properly. If you consent to it, we will also set other types of cookies. You can provide or withdraw your consent to the different types of cookies using the toggles below. You can change or withdraw your consent at any time, by clicking the link “Manage Cookies”, which is always available at the bottom of the site. To learn more about what the different types of cookies do, how your data is used when they are set etc, see our Cookie Policy. Strictly necessary These cookies are necessary to make the site work properly, and are always set when you visit the site. Vendors Teamtailor Analytics These cookies collect information to help us understand how the site is being used. Vendors Teamtailor Accept these cookies Decline all non-necessary cookies Skip to main content Career menu Employee Log in as employee Candidate Log in to Connect Homepage hadean.com Share page Facebook X LinkedIn Mail Engineering · London · Hybrid Simulation Software Engineer Apply for this job Location: London Travel: Travel required several times per year (UK and international), sometimes at short notice and for up to 1 weekSecurity: Must be eligible to obtain and maintain UK security clearance to at least SC levelHadean is an award-winning software company building software that enables real-time decision support, simulation, mission rehearsal and digital environments for the defence industry.Hadean is a deep-tech company building cutting-edge distributed computing technology that powers scalable, secure, and interoperable digital environments. Our platform enables real-time simulation and training, mission rehearsal, command & control and digital twin capabilities—transforming the way defence, government agencies and enterprises plan, train, and make decisions.Hadean’s solutions have helped organisations including the UK MoD, US DoW, BAE, Leidos, and more, and we work with these customers at the forefront of defence innovation, collaborating with global partners to deliver next-generation capabilities that unlock operational advantage.The Role:As a Simulation Software Engineer in our populAI team, you will own substantial parts of the simulation that makes continent-scale defence training feel like the real world - the behaviour and interactions of pedestrians, traffic, shipping, aircraft, satellites and critical national infrastructure that populate a scenario. This is the core of populAI: the difference between an exercise that feels like a map overlay and one that reacts to a trainee's decisions with the emergent chaos of actual people and systems. You'll shape how a class of simulated actor decides and acts, how the simulation stays coherent when partitioned across a compute cluster, and how new LLM-backed capabilities - natural language control, richer actor generation, simulated social media - are brought into the engine. Your work will ship into customer exercises, live demonstrators and integration hackathons, where the loop between building...

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