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DPDevesh Parmarbackend-bytes.hashnode.dev2d ago · 6 min read

Distributed Locks: The Bug That Only Shows Up Under Load

Imagine you're the engineer at a ticketing platform during a major concert drop. Two users click "Book Seat 14B" at the exact same millisecond. Both requests hit different servers. Both servers read t

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YJYasir Jafriyasir323.hashnode.dev2d ago · 13 min read

Tap, Tap, Charged Twice: The Idempotency-Key Pattern

A friend once messaged me, mildly furious, with a screenshot from his bank: the same $500 payment, twice, two seconds apart. He'd tapped "Pay," the app spun for a moment, nothing happened, so he tappe

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YJYasir Jafriyasir323.hashnode.dev2d ago · 17 min read

The Transactional Outbox Pattern in Python: Solving the Dual-Write Problem

There's a particular kind of bug I've learned to be afraid of. It doesn't throw an exception. It doesn't show up in your tests. It passes code review, ships on a Friday, and works perfectly for three

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SMS M Piyas Mahamude Aliftechopinion.hashnode.dev4d ago · 19 min read

Node.js Thread Pool Under the Hood The Secret Engine Behind libuv's Architecture, Scheduling, Optimization, and High Concurrency

Introduction: The Lie You Were Told Every Node.js tutorial opens with the same sentence: "Node.js is single-threaded." It is a sentence that is both true and wildly misleading at the same time. Yes,

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PMPeace Melodipeacemelodi.hashnode.dev6d ago · 5 min read

Building a Flash Sale Engine That Cannot Oversell: Distributed Locking and Optimistic Concurrency in NestJS

The problem flash sales create Flash sales create one of the most unforgiving concurrency problems in backend engineering. Thousands of people request the same limited stock in the same instant. If tw

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PEPrasad Ekkeprasadekke.hashnode.devJun 17 · 7 min read

Three Go Concurrency Mistakes I See in Almost Every Worker Pool

Go makes concurrency feel easy. Goroutines are cheap, channels are built into the language, and the standard library gives you everything you need to spin up a worker pool in under 30 lines. That ease

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RKRakesh Kishoretunedinstance.comJun 16 · 7 min read

Cracking Deadlocks: Isolation Levels and Concurrency Architecture

Few database anomalies disrupt production applications as abruptly as a sudden surge of deadlocks. One minute your system is processing transactions seamlessly; the next, the application error logs ar

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SSergeyscalable-architecture.hashnode.devJun 16 · 2 min read

Designing a Distributed Locking System for High‑Concurrency SaaS Workloads

As SaaS platforms scale, multiple workers, services, and background processes begin competing for the same resources. Without proper coordination, this leads to race conditions, duplicate processing,

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NPNitin Poojarynitin-poojary-golang.hashnode.devJun 10 · 12 min read

Concurrency the Hard Way: What an Air Hockey Server Taught Me About Go

Introduction From the past few months I have been learning Go, but learning through tutorials and practice questions wasn't cutting it. What I wanted was to build something real, something that would

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PJPriyanshu Jajalpriyanshujajal.hashnode.devJun 2 · 6 min read

Escape Analysis in Go

I was deep in building my Go HTTP Server - the one where I bypassed net/http entirely and built a multi-threaded engine from raw TCP sockets; when I wrote this line inside the POST handler: bodyBytes

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#concurrency

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#concurrency

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Trending tags this week

Distributed Locks: The Bug That Only Shows Up Under Load

Tap, Tap, Charged Twice: The Idempotency-Key Pattern

The Transactional Outbox Pattern in Python: Solving the Dual-Write Problem

Node.js Thread Pool Under the Hood The Secret Engine Behind libuv's Architecture, Scheduling, Optimization, and High Concurrency

Building a Flash Sale Engine That Cannot Oversell: Distributed Locking and Optimistic Concurrency in NestJS

Three Go Concurrency Mistakes I See in Almost Every Worker Pool

Cracking Deadlocks: Isolation Levels and Concurrency Architecture

Designing a Distributed Locking System for High‑Concurrency SaaS Workloads

Concurrency the Hard Way: What an Air Hockey Server Taught Me About Go

Escape Analysis in Go