| 1. In 2010, Uday Ruddarraju served as a Software Engineering Intern at Amazon. |
| 2. He started working as a Software Engineer Intern at Capital IQ in December 2010. |
| 3. From September 2011 to August 2012, he served as a Research Assistant at the University of Minnesota. |
| 4. Worked as a Software Engineer Intern at eBay in May 2012. |
| 5. Joined eBay as a Software Engineer II in February 2013. |
| 6. Promoted to Senior Software Engineer in March 2014 at eBay. |
| 7. Served as Staff Software Engineer at eBay from Feb 2016 to Jun 2017. |
| 8. Joined Robinhood as a Staff Software Engineer in August 2018. |
| 9. Promoted to Principal Software Engineer at Robinhood from Jan 2021 to Dec 2022. |
| 10. Became Senior Director of Engineering at Robinhood in Jan 2023. |
| 11. Was Head of Infrastructure Engineering at xAI and X from Jun 2024 to Jul 2025. |
| 12. Helped in building the cloud infrastructure of eBay. |
| 13. Responsible for building the large computing systems at xAI and OpenAI. |
| 14. Led the team that created systems for training AI models like GPT-5.6. |
| 15. Worked on the Colossus supercomputer at xAI, a cluster that exceeded 250,000 GPUs. |
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