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CDCoding Dropletscodingdroplets.comJul 10 · 12 min read

How to Build a Job Queue in .NET with PostgreSQL SKIP LOCKED: A Real-World Walkthrough

Every .NET team eventually needs to run work outside the request cycle: send the welcome email, generate the invoice PDF, push the webhook, re-index the search document. The default instinct is to rea

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RCRahul Chaduvulasoftwareconcepts.hashnode.devJul 10 · 6 min read

Building a Concurrency-Safe Movie Reservation System

Introduction One of the most interesting challenges in backend engineering isn't building CRUD APIs—it's designing systems that continue to behave correctly when hundreds of users interact with them s

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DPDarsh Pateldarsh-patel.hashnode.devJul 4 · 5 min read

7 Go Concurrency Patterns Every Developer Should Know – Simplified Guide

Go is popular for its powerful concurrency features, making it a fantastic choice for building scalable backend systems. In this post, we’ll break down 7 key concurrency patterns in simple language, w

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SKShubham Kumar Singhblog.realdev.clubJul 3 · 5 min read

How I Solved the Ordered Parallel Batcher Problem in JavaScript

Every coding problem teaches you something new. Recently, I worked on an interesting asynchronous JavaScript interview question called Ordered Parallel Batcher. At first, I thought the solution would

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EWEzra Wuqwertyboy0325.hashnode.devJul 3 · 9 min read

FOR UPDATE SKIP LOCKED Was Not Enough: A Stale Failure Write Race in an Inbox Processor

Why a post-rollback failure transition needs its own serialization boundary. I found this while auditing a reliability claim in a small inbox processor. The processor used PostgreSQL, multiple worker

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SHSohag Hasannotes.sohag.proJun 29 · 9 min read

Atomic Transaction Posting in Go: Getting Balance Invariants Right Under Concurrency

Imagine an account with 100 taka in it, and two withdrawals of 100 taka arriving at the exact same instant. Both read the balance, both see 100, both say "yep, enough money," and both go through. The

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DPDevesh Parmarbackend-bytes.hashnode.devJun 27 · 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.devJun 27 · 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.devJun 26 · 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.devJun 24 · 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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#concurrency

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Trending tags this week

How to Build a Job Queue in .NET with PostgreSQL SKIP LOCKED: A Real-World Walkthrough

Building a Concurrency-Safe Movie Reservation System

7 Go Concurrency Patterns Every Developer Should Know – Simplified Guide

How I Solved the Ordered Parallel Batcher Problem in JavaScript

FOR UPDATE SKIP LOCKED Was Not Enough: A Stale Failure Write Race in an Inbox Processor

Atomic Transaction Posting in Go: Getting Balance Invariants Right Under Concurrency

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