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365 episodes

The Almost Correct System
25/01/2026 | 40 mins.
RexIDE - https://rex.mindmeld360.com
Design Local Delivery Service - GoPuff - System Design Interview Series
24/01/2026 | 31 mins.
RexIDE - https://rex.mindmeld360.com

In this episode, we design a local, ultra-fast delivery system inspired by GoPuff.
We break down:
service boundaries (ordering, inventory, dispatch)

real-time courier assignment

warehouse-centric delivery vs marketplace models

latency, batching, and failure scenarios
Java Memory Model (JMM)
22/01/2026 | 29 mins.
RexIDE - https://rex.mindmeld360.com
We explore the fundamental concept of Happens-Before (HB)—not a measure of time, but a formal mathematical relationship that provides the only real guarantee of visibility and ordering in a multi-threaded world. Without an HB edge, your threads are effectively living in different realities, where one thread might see an object has been published but observe its internal fields as stale or uninitialized zeros.
AWS Lambda Pricing
19/01/2026 | 23 mins.
RexIDE - https://rex.mindmeld360.com⁠
Http 123
04/10/2025 | 1 mins.
http 123

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