Unity Physics Guru Wanted – Welding/Melting Sim (Must have done it!)

We are building a high-fidelity VR simulator for professional welder training. The platform already has realistic visuals, motion tracking, and interactive scenarios. Now we need to add a powerful physics engine that simulates heat transfer, melting, weld pool dynamics, bead formation, and defect detection – all in real time (at 60+ FPS). We are NOT looking for a theorist. We need a hands-on practitioner who has already implemented similar mathematical models (thermal, fluid, phase-change) in a game engine or interactive simulator, and can deliver a proven, working solution under strict performance constraints. What you'll do - Develop and implement a mathematical model of the welding process (heat propagation, melting, flow, solidification) driven by a moving heat source. - Ensure the model outputs: temperature maps (3D or surface), weld bead geometry evolution, and real-time alerts for local defects (lack of fusion, overheating, porosity, etc.). - Integrate the model with Unity – propose the architecture, data exchange protocol, and handle latency/performance trade-offs. - Validate the model against reference data and tune it for a realistic feel. - Be prepared to challenge our current assumptions and suggest a better approach if needed. We are flexible and value your expertise. Required skills - Proven experience in mathematical modeling of physical processes (heat transfer, fluid dynamics, phase transitions) for real-time applications. - Strong coding skills in C++, C#, Python, or MATLAB – with a focus on performance (multithreading, GPU compute). - Experience integrating such models with a game engine (Unity preferred; Unreal also considered). - Deep understanding of numerical methods (FDM, FEM, particle methods) and how to balance accuracy with speed. - Ability to clearly document your work and communicate complex ideas to a non-specialist team. How we work - We are a small, agile team of developers, designers, and engineers. - We value proactive communication – regular updates, early feedback, and collaborative problem-solving. - We are open to your ideas: if you think a different modeling approach would work better, we're ready to discuss and pivot. What we offer - An engaging, challenging project (minimum 3+ months, likely longer). - Fully remote collaboration. - Competitive pay – $20–40/hour, depending on experience and fit. - A chance to work on a cutting-edge product used by professional welders worldwide. - Flexible schedule – we focus on results, not hours. To apply, please include: 1. A brief summary of your relevant experience (especially projects where you integrated physics models into game engines). 2. Your preferred hourly rate and availability. 3. Any questions about the project – we'll be happy to answer. We look forward to hearing from you!