Principal Software Engineer Philadelphia, PA, US Sep 10, 2026 0.00 mi - Bentley Systems, Incorporated

Principal Software Engineer Location: Philadelphia, PA – Hybrid No sponsorship is available for this role Position Summary: Cesium, as part of Bentley Systems, is setting the standard for 3D geospatial technology across diverse industries, from construction and engineering to defense and aerospace. With a thriving open-source community and millions of downloads, we are at the forefront of innovation. We are seeking a visionary Principal Engineer to join our Cesium Native squad. This role is pivotal in advancing our core C++ libraries that power 3D geospatial applications and experiences within the world's leading game engines. You will be a leading voice in the technical direction of our open-source, cross-platform technology that enables developers to stream and visualize massive real-world 3D datasets. Responsibilities: Architect, develop and shape the future of the core Cesium Native C++ libraries, focusing on performance, modularity, and clean API design to support our integrations with Unreal Engine, Unity, and NVIDIA Omniverse. Drive the research and implementation of novel 3D graphics algorithms, tackling the most challenging problems in large-scale geospatial visualization. Enhance our runtimes capabilities for high-performance streaming, level-of-detail selection, and efficient decoding of massive geospatial datasets. Profile and debug the engine to identify and eliminate performance bottlenecks, ensuring a smooth experience for end-users on a variety of platforms. S