Job Description

Reporting to the Director of Product, we are seeking a hands-on modeler to build and

calibrate the equation-oriented mechanistic models and forward simulators at the

heart of our physics engine, the foundation for physics-informed optimization in real

operational settings. This role turns physical processes into rigorous, trustworthy

Python models that our optimization and AI systems rely on.

This is a builder role, not a research-only position. Success is measured by validated,

production-grade models that run in real systems and produce customer value.

Adjacent titles you may recognize this role by: Process Simulation Engineer,

Computational Scientist / Computational Modeling Engineer.

Duties and responsibilities include:
- Building equation-oriented mechanistic models of unit processes including transport, separation, fouling accumulation, and cleaning/recovery dynamics, in Python
- Developing forward dynamic simulators that predict process behaviour over operating cycles




- Calibrating and validating models against real operating data with our process engineers, and running parity checks against ground truth
- Contributing quick surrogate and hybrid (physics-informed) model components where full-order simulation is too slow for real-time use
- Supplying the simulation, residual, and validity outputs that our optimization layer consumes
- Performing parameter estimation and uncertainty quantification, and clearly communicating model assumptions, validity ranges, and confidence
- Participating in peer-reviews of model designs and related code
- Analyzing and resolving technical modelling problems
- Writing production-grade, well-tested, version-controlled Python that meets our engineering standards

Core Requirements
- Master's degree, or 3+ years of relevant experience, with a strong foundation in mathematics and either mechanical or chemical engineering (or physics / applied mathematics with equivalent transport and thermodynamics groundi

📌 Process Modelling Engineer (India)
🏢 HAAR Recruitment
📍 India