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Onatade AbdulmajeedSep 20, 2026 • 18 min read
Week 14 of #100DaysOfCode: Completing JUnit 5 and Starting a New Portfolio
Introduction This week was another productive part of my #100DaysOfCode journey, with a...
#100daysofcode#testing#backend#ai
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HasanH47Sep 24, 2026 • 6 min read
Why should request state survive after the request is finished?
A request arrives, creates some mutable state, and finishes. In most backends that state is still al...
#typescript#backend#node#webdev
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MANGESH MANDLIKSep 23, 2026 • 8 min read
The Query That Got Slower Every Week: A Pagination Post-Mortem
Somewhere around month four of a product's life, someone on the team notices the products page has.....
#backend#database#api#systemdesign
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Dilip V PSep 24, 2026 • 5 min read
GraphQL Did Not Delete Your Waterfall, It Moved It
One profile screen. A name and photo, the last four posts with their titles and like counts,...
#backend#systemdesign#api#graphql
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Marco OrtaSep 21, 2026 • 8 min read
Node 26: What Breaks When You Upgrade, and When the Jump Is Worth It (LTS Guide)
Node 26 shipped on May 5, 2026 and enters LTS on October 28. It's a calm upgrade — the list of thing...
#node#javascript#backend#migration
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Yodit WeldegeorgiseSep 21, 2026 • 11 min read
Your API Is Someone Else’s Dependency
When I was preparing for my Commit Your Code conference talk on common mistakes developers make when...
#api#backend#programming#softwaredevelopment
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Rafael Bernard AraújoSep 20, 2026 • 7 min read
Permissions and Authorisation: A Practical Playbook
> **Disclaimer: This is the point-in-time version of my "Playbook - Permission and Authorisation"...
#architecture#backend#security#softwareengineering
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Cherry HarambeSep 24, 2026 • 4 min read
Your ISR pages aren't stale because ISR is broken. They're stale because nobody visited them.
I run a Next.js content site on Vercel. A few hundred pages, revalidate set to 300 seconds, App...
#backend#nextjs#react#webdev
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lukman lukmanSep 22, 2026 • 7 min read
Caching: Why Faster Reads Create Consistency Problems
A dashboard request can look harmless. The problem appears when hundreds of users ask for the same....
#redis#backend#go#softwareengineering
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knot crochetSep 24, 2026 • 4 min read
Never Leave a Payment Authorized and Uncaptured
PayPal lets you leave an approved order uncaptured. The buyer has agreed, no money has moved, and yo...
#backend#programming#webdev
0 1
NSep 20, 2026 • 7 min read
Why I Built Another In-Memory Cache for Go
There are already several good in-memory cache libraries for Go. So when I started building...
#backend#go#performance#softwaredevelopment
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MANGESH MANDLIKSep 23, 2026 • 7 min read
The Bug Where a Customer Got Charged Twice for Nothing They Did Wrong
A customer taps "Pay ₹4,999." The request reaches your payment service, the card gets charged, money...
#backend#api#distributedsystems#systemdesign
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zoro maSep 20, 2026 • 26 min read
When the Dialect IS the API: Reading Army and jOOQ Side by Side, Through PostgreSQL Source
Army (the subject of this article): https://github.com/PillArmy/army jOOQ (the comparison target):.....
#backend#database#java#sql
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晖莫Sep 25, 2026 • 4 min read
Cache invalidation is a domain problem, not a TTL setting
A cache is a copy of a decision you already made. Picking a TTL is a bet on tolerable staleness, not...
#caching#backend#redis#architecture
0 1
Denis ToropovSep 20, 2026 • 7 min read
When the Same Reference Data Lives in Three Services: Why We Moved It into a Dedicated Service
How to reduce data collisions when three services use different databases but rely on the same...
#architecture#backend#distributedsystems#microservices
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Majid KhazaeiSep 19, 2026 • 9 min read
The Concurrency Bug That Only Appears Under Load: A Django Race Condition Story
Section 1: The Bug That Never Shows Up in Development There's a category of bugs that...
#backend#debugging#django#python
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MANGESH MANDLIKSep 20, 2026 • 9 min read
Why REST Scales, and the Three Ways It Bites Back
Say you are building a product page. The mobile team asks for one small thing: a heart icon that...
#rest#api#backend#webdev
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Mugendi NjueSep 24, 2026 • 5 min read
Postgres Logical Replication for Reporting Replicas: The Gotchas Nobody Puts in the Tutorial
If you've read the Postgres docs on logical replication, you've seen the happy path: CREATE...
#postgres#database#replication#backend
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Neeraj SinghiSep 19, 2026 • 6 min read
Goroutine Ownership and Cancellation Contracts: Preventing Leaks in Long-Running Go Services
How to enforce goroutine ownership, structured cancellation, and bounded parallelism to eliminate le...
#architecture#backend#go#performance
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Feezan KhattakSep 19, 2026 • 6 min read
Your Payment Webhook Handler Probably Processes Duplicates
The customer's browser reaches your success page and calls your API: "the payment worked, please shi...
#java#springboot#security#backend
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Darshan TurakhiaSep 19, 2026 • 6 min read
How a Retry Loop
A nightly export job
#elasticsearch#backend#database#devops
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Majid KhazaeiSep 23, 2026 • 9 min read
The Second Race Condition: When Updating a Record Is Just as Dangerous as Creating One
A Django concurrency story about read-then-mutate, silent no-ops, and why one fix is never enough. ...
#backend#django#python#softwareengineering
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Muhammad Sumon Molla SelimSep 25, 2026 • 11 min read
Designing a Flash-Sale Seat Reservation System in AWS (Part 2): Never Sell a Seat Twice
TL;DR: Every booking goes through one Redis Lua script. The script checks, in order, whether the...
#architecture#aws#backend#systemdesign
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Hussain AhmadSep 22, 2026 • 11 min read
Node.js vs Bun: What Actually Changes When You Switch?
If you've been building JavaScript or TypeScript backends for a while, you've probably seen the same...
#node#bunjs#typescript#backend
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