Programmers

365 épisodes

The Almost Correct System
25/01/2026 | 40 min
RexIDE - https://rex.mindmeld360.com
Design Local Delivery Service - GoPuff - System Design Interview Series
24/01/2026 | 31 min
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 min
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 min
RexIDE - https://rex.mindmeld360.com⁠
Http 123
04/10/2025 | 1 min
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