Join us as we explore what site reliability actually looks like at Fortune 1 scale! In this episode, Yoseph Reuveni, Sr. Director II of SRE at Walmart Global Tech, traces a career from an Israeli VC seat through Elbit, Amazon Prime Video, Bloomberg compliance and Jet.com, into running the only SRE function for a company with 35,000 engineers and 2.5 million employees. Discover how his team went from eight engineers staring at dashboards all night to a single person on the holiday bridge, why an EVP asked "how does one SRE beat all of you?" in a room with 600 engineers, and why he calls unit test coverage in the GenAI era "one big fiction."
Yoseph Reuveni on LinkedIn - https://www.linkedin.com/in/yosephreuveni/
Miki Manor on LinkedIn - https://www.linkedin.com/in/mikimanor/
Ofir Stein on LinkedIn - https://www.linkedin.com/in/ofir-stein/
DevOps Leaders - https://www.linkedin.com/company/devops-leaders-il/posts/?feedView=all
Key takeaways:
* The real difference between SRE and DevOps: DevOps upgrades the database, SRE asks what tier it is and whether the customer would even notice it going down.
* 300 SREs supporting 32,000 developers, versus Google's roughly 7,000 SREs for 30,000 developers.
* Walmart's "triplet" architecture: three US regions, each with a private data center plus Azure plus Google, 2 milliseconds apart, all active at once, with cost and capacity deciding where work runs.
* Holiday peaks run 100x a normal day and last for hours, not minutes. Microsoft built data centers so Walmart would have enough capacity.
* 5 billion metrics per second, a volume most monitoring products simply cannot ingest, which is what turned build-versus-buy into build.
* His first week produced a list of 60 things to fix. His boss made him pick three: automation, tech debt, and observability.
* Attacking problems by class, not by incident. One expired certificate becomes a program to eliminate every trust failure across Walmart.
* Adding a missing metric used to mean chasing a team for a year. Now it's two buttons, no code change, no deployment.
* Why AI made him a "master lazy" engineer, and why juniors shipping code they can't explain forced Walmart to require an architect's signature on any runtime change to a new resource.
* The best-selling item at Walmart on Black Friday two years ago: over 30 million bananas.
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