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Engineering
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London
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Hybrid
Simulation Software Engineer
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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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