Senior Principal Software Engineer, Graphics

Cesium (now a part of Bentley) is defining the standard for 3D for the built and natural environment from the construction site to the battlefield, from outer space to underground. Cesium has more than 10,000,000 lifetime open-source downloads, and we support a thriving open-source community. We are looking for a Senior Principal Software Engineer to help drive the next generation of our platform architecture across our Cesium runtimes and 3D data pipelines. In this role, you'll help define and evolve the architectural foundations that power our platform, working across teams to ensure technical coherence, scalability, and developer experience. You’ll partner closely with Product and Engineering leadership, shape standards inside and outside the company, and still spend a meaningful amount of time in the codebase to stay sharp and lead by example. This role offers: Opportunity to shape industry by defining open standards like 3D Tiles; High autonomy, high impact, and direct influence on Cesium’s long-term direction; Mission-driven culture built on openness, interoperability, and engineering excellence.