As a Principal Engineer at Envelop VR, I was responsible for:* Managing a team of top-tier engineers developing bleeding edge productivity software for new Virtual Reality hardware (Oculus, Htc Vive).* Porting an existing engine from OpenGL to Direct3D, optimizing for Virtual Reality by maximizing CPU performance and minimizing latency.* Deep engineering on the Windows platform to allow full desktop integration into a VR environment, involving significant low-level plumbing at the graphics and input layers.* Reviewing, optimizing and designing code at all levels of the product, from setup/installation, networking and system level to graphics and VR.* Technical discussion and interaction with investors, partners and customers at all levels.

As the principal graphics engineer at Uber Entertainment, I was a key engineer on Planetary Annihilation, and was responsible for:* Architected a suite of CPU/GPU profiling and memory tracking/debugging tools to help optimize client and server performance.* Significantly re-architected graphics and other client-side systems for Planetary Annihilation (an OpenGL-based engine) to boost performance on target PC specs from <2fps to 60+ fps, leveraging latest OpenGL techniques and extensions where available. This work included re-architecting the engine from single-threaded to expand and utilize all available cores on the system.* Worked with art, technical artists to implement GPU-based particle engine, post-process pipeline (including full HDR, anti-aliasing, and SSAO), and various significant optimizations to all parts of the client code-base.* Testing, bug fixing and optimization of server-side code for gameplay logic, pathfinding, AI and networking code.

Working in Xbox ATG (Advanced Technology Group) helping developers make great games on Microsoft platforms.

* Deep engagement with games ISV architecting, developing and optimizing prototype advanced future technology rendering on experimental graphics hardware platform. Resulted in first real rendered results on pre-release hardware, results report escalated to CEO level.* Architected, prototyped and optimized tasking API to run complex algorithms on multi-core CPUs (8 – 12 HW threads) and massively parallel experimental hardware (128 HW threads).* Prototyped methods to move post-processing, shadow mapping and other techniques from GPU to CPU. Included creating a UMD shim driver to intercept D3D runtime calls to UMD to insert post-process functionality in any title.* Engaged with AAA developers to disclose future roadmaps, prototype and optimize code on Intel HW platforms (CPU and graphics platforms)

* Developed and presented new content at Gamefest US conference on system and graphics tracks (ATG)* Managed team of 5 top engineers, involved deeply in career development, performance management, role-modeling and mentoring (ATG).* Interfaced with developers to troubleshoot functional or performance issues, driving issues to resolution. Primarily focused on Xbox 360 graphics but with some engagement with DirectX developers on windows (ATG).