About the Role
At Evoxia, we are reshaping the environmental footprint and supply chain security of the solar sector. We bypass carbon-heavy legacy smelting to manufacture ultra-high-purity solar silicon using clean hydrogen plasma reduction.
We are looking for a Design Engineer to own the mechanical design of our plasma reduction reactor — from concept through fabricated, commissioned hardware. This is a role for someone who thinks in both CAD and physics: a vessel that holds vacuum while containing a multi-thousand-kelvin plasma in a hydrogen atmosphere is simultaneously a structures problem, a thermal problem and a gas-dynamics problem, and the three do not decouple.
If you have designed plasma etch or deposition chambers, high-temperature process equipment, or vacuum systems, this is the same discipline pointed at a harder product.
What You Will Do
• Reactor Design Ownership: Own the mechanical design of the complete reaction vessel — pressure boundary, internal geometry, lining, product collection and all ports and penetrations — from concept through to released drawings.




• Pressure Boundary Engineering: Size and validate a vessel operating below atmospheric pressure, where the shell is loaded externally and the governing failure mode is collapse rather than yield. Specify shell thickness, stiffening, closures and the roundness tolerances that make the calculation meaningful.
• Internal Flow Path Design: Design the geometry from the plasma source through the reaction volume to the outlet, including cross-section variation along the axis — the feature set that governs residence time, velocity and the thermal profile the reduction chemistry requires.
• Thermal Architecture: Design the internal lining, cooling arrangement and thermal standoff that separate the hot duty from the pressure-bearing duty, with internal temperatures reaching the order of 2,500 °C at the lining. Resolve differential expansion between hot internals and a cooled shell, and keep every seal

📌 Design Engineer (Chennai)
🏢 Evoxia
📍 Chennai