Sr. 3D C++ Software Engineer (On-site)

United States of America, California, Pomona R5026291 United States of America Engineering

Job description

About the Team

The software team is part of the Global Manufacturing Engineering (GME). Alongside GME's Hardware Controls, Manufacturing Process, and Automated Quality Control teams, we build the geometrical compiler behind Spark™ Clear Aligners: the math-heavy software stack that turns digital treatment intent into physical parts at production scale. Our systems decide how geometry gets transformed, nested, validated, and translated into instructions that run across a global factory footprint producing more than 100,000 unique parts per day.

This is not generic application development. Our code drives scanners, printers, mills, and other fab equipment. Physical reality is the unit test. When the math is wrong, parts are wrong.

Job Summary

We are hiring a Sr. 3D C++ Software Engineer who is genuinely strong in applied math, understands the physics behind manufactured parts and processes, and can turn that reasoning into production-grade C++. You will work on the core algorithms and services that bridge CAD to CAM: geometry processing, numerical optimization, physical constraint modeling, and the software interfaces that let those models run reliably in production.

You should be comfortable moving from formulating a problem from first principles to shipping the implementation without handholding. If deriving a normal from three points on a triangle, reasoning about numerical stability, or solving a nonlinear equation numerically feels outside your daily toolkit, this is likely not the right role. At this production volume, a solver running at 99.9% reliability still generates roughly 100 support escalations per day. Correctness isn't a quality bar — it's a throughput constraint.

This is a full-time and on-site five days/week engineering role in Pomona, CA. Rapid development here depends on being next to the hardware and th...