https://www.guptasachinn.com/writing/system-design-gateway
The Gateway: One Front Door — Sachin Gupta
A deep look at the gateway, the third building block from the request-path overview. The cross-cutting jobs it does once for everyone (authentication, routing,...
the gatewayfront doorsachin guptaone
https://www.guptasachinn.com/writing/system-design-invalidation
Cache Invalidation: Keeping a Cache Honest — Sachin Gupta
A dedicated look at cache invalidation, the hard half of caching. Why a stale hit is worse than a miss, then the four strategies to keep a cache honest: TTL...
cache invalidationsachin guptakeepinghonest
https://www.guptasachinn.com/activities/platformcon-2026
PlatformCon — Sachin Gupta
Agents are in production and doing privileged things, but the guardrails did not arrive with them. This PlatformCon talk lays out a Java and Spring Boot...
sachin gupta
https://digitalcommons.uri.edu/mcise_facpubs/530/
"Mechanics of the implosion of cylindrical shells in a confining tube" by Sachin Gupta, James M....
A fundamental experimental investigation, with corresponding computational simulations, was conducted to understand the physical mechanisms of implosions of...
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https://www.guptasachinn.com/about
About · Sachin Gupta
Backend engineer with 15+ years building large-scale billing and financial systems. Currently at eBay.
sachin gupta
https://www.guptasachinn.com/writing/system-design-lb-spreading
How a Load Balancer Spreads the Load — Sachin Gupta
A dedicated look at the load-balancing algorithms that spread traffic across servers. The static-vs-dynamic split, then each rule in turn with its own analogy...
load balancersachin guptaspreads