Tesla's AI hardware design chief departs for ex-Dojo startup DensityAI
Shishuang Sun, Tesla's senior director of AI hardware design who spent over five years architecting chips for the Dojo supercomputer and Autopilot computers, has left for DensityAI — a startup founded by ex-Dojo engineers — adding to a string of chip-talent departures as Tesla stakes its valuation on in-house AI silicon.
According to Electrek, Shishuang Sun — Tesla's senior director of AI hardware design — has left the company to join chip startup DensityAI. He spent more than five years at Tesla as an AI hardware architect on the Dojo supercomputer and Autopilot computers.
Sun's specialty is advanced packaging and system integration — the discipline of getting power into a chip and heat out of it at scale, which has become one of the industry's biggest bottlenecks in high-performance AI silicon. He reportedly started at DensityAI in July in a role listed as 'Packaging and System Hardware.'
DensityAI was founded by Ganesh Venkataramanan, Tesla's former Dojo chief, and roughly 20 members of Tesla's supercomputer team have followed him there. Tesla shut down the Dojo project itself in 2025, pivoting toward external AI partnerships.
Tesla is staking its robotaxi, FSD and Optimus valuations on the competitiveness of its in-house AI chips (like AI4/AI5). The departure was corroborated by multiple outlets including Seeking Alpha and TipRanks, and comes as investors watch whether a continued drain of chip talent could weigh on Tesla's execution on custom silicon.
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