System design fundamentals: estimate, scale and trade off
Part 1 of 8 · week 1 of the learning path Every large design is the same few building blocks combined to meet numbers, so learn the blocks and learn…
Latest News
⚑ Report a ProblemTech news from the best sources
All topics
AI
Gear
News
Tech
agents
ai
api
architecture
automation
beginners
career
database
devchallenge
devops
discuss
javascript
llm
machinelearning
mcp
opensource
performance
productivity
programming
python
security
showdev
testing
tutorial
typescript
webdev
Caching Is Easy. Cache Invalidation Is Where Systems Break: A Practical Guide
Adding a cache takes ten minutes. Debugging the bug it causes six months later takes a week. Caching trades correctness for speed . The senior move…
AEGIS v1 is archived. Here is what replaces it
I've shut down AEGIS v1 and archived github.com/hikmahtech/aegis . The code stays public and MIT-licensed. You can still read it, fork it and learn…
Thought Experiment: If 100GB of structured/3D data could be losslessly compressed to 1GB, what would you build?
This post is a pure thought experiment exploring what kind of system designs and products would become possible if data size constraints suddenly sh…
Sacrificial Architecture: Building the Service You Already Plan to Delete
The most expensive service in your system isn't the one you'll maintain for ten years. It's the one you'll maintain for ten years by accident , beca…
The storm is only the beginning: how design shapes system failures
Every morning, the coffee brews, the phone charges and the lights come on. None of it feels like infrastructure. Each one sits at the end of a long…
Loop vs Graph vs Harness: How AI Agents Actually Work
If you're starting to build AI agents, you'll hear three words a lot: loop , graph and harness . They sound complicated. They're not. In this articl…
Boundaries and Meaning
Before separating the software, ZibiWorks needs to understand the business boundaries hidden inside its monolith. This article is part of ZibiWorks,…
To Rewrite or To Refactor? How AI is Flipping the Legacy Modernization Playbook
For decades, software engineering followed an unwritten golden rule: "Never rewrite legacy systems from scratch." Refactoring in place was almost al…
Stop Asking Video Models to Run Physics: Inside Matrix-Game 4.0
Over the past two years, neural world models have attempted to turn video generators into complete simulation engines. The premise sounded straightf…
GPT-6.1 Sol: A Practical Guide
TL;DR GPT-6.1 Sol provides near-flagship intelligence for software development, computer use, and multi-step agentic workflows at one-fifth the stan…
Shadow Monitoring: A Practical Guide
TL;DR Shadow monitoring evaluates candidate software, API routing rules, and AI models against mirrored production traffic without exposing end user…
Mainframe Modernization: Why It Matters and the Strategies Enterprises Should Know
Introduction Mainframes continue to support mission-critical business operations across banking, insurance, healthcare, manufacturing, and retail. T…
Four ways our code avoids importing Electron, and the one file that imports it at the top and takes ten others with it
Notifio is an Electron app with no test framework in it. The whole testing arrangement is three scripts run by tsx : "test" : "pnpm test:baseline &a…
As-Built Management: A Practical Workflow for Drawings, Changes, and Handover
As-built management is the process of capturing, checking, organizing, and maintaining records of what was actually constructed. It starts when inst…
Why AI Projects Fail Between Prototype and Production
An AI prototype can work perfectly during a demo and still fail when real users start using it. The model returns accurate answers. The chatbot resp…
Jitsi is the right default for meetings. Here is the narrower case where it is not
Disclosure: I sell Low-Latency Kit, a commercial WebRTC source kit. This post compares it honestly with Jitsi Meet, an Apache-2.0 project. I do not…
How we built teams of AI agents that don't loop
"Multi-agent" demos usually show a few agents chatting in a shared room until something good comes out. That works in a demo. In a product it gives…
Why We Built a Zero-Upload, 100% Client-Side Web Utility Suite published: true tags: webdev, javascript, canvas, performance
When handling image optimization or PDF manipulation, the industry standard has long been server-side processing: upload the file, process it via FF…
Defeating Silent Schema Drift in FastAPI and Pydantic v2: A Defensive Engineering Guide
Defeating Silent Schema Drift in FastAPI and Pydantic v2: A Defensive Engineering Guide 1. The Anatomy of a Silent Production Incident: How Permissi…
Architecture and Inner Workings of AP2 (Agent Payments Protocol)
This technical guide provides a try of a "practical blueprint" for implementing the Agent Payments Protocol (AP2) in our applications. We will explo…
The single-process backend: how Yatta JS collapses ten engines into one Bun process
I launched Yatta JS 1.0 a few days ago. That post was the what. This one is the how. Most backends are a pile of services glued together. Database h…
A Residency Lease for Agent Runs: Expiring Placement Decisions Instead of Static Config
A Residency Lease for Agent Runs: Expiring Placement Decisions Instead of Static Config Reproducing the failure takes about a minute on any laptop:…
On-Prem to Cloud Migration: Running the Systems That Can't Move Yet
If your on-prem to cloud migration plan assumes one clean cutover, expect that plan to change. Most migrations run hybrid for months or years. The r…
When the UI Knows More Than the Evidence
Building an evidence-first timeline and map for contested historical data Explore the project on Doxascope EN . AR . A timeline is one of the simple…
Model Instruments as First-Class Records: Calibration Status, Check Readings and Out-of-Tolerance Holds in a Food ERP
By Isaac Muthui, CEO, Tamalaki Business Network Ltd. Originally published at factoraerp.com . Most factory software treats a measurement as a number…
How We Built a Real-Time Football Analytics Dashboard with Nuxt 4 and Redis
How We Built a Real-Time Football Analytics Dashboard with Nuxt 4 and Redis Building a sports analytics platform comes with a unique set of engineer…
A Timeout Is Not a Failure. Your Platform Thinks It Is.
At the end of March, an accounts payable clerk at a supplier called Wei, the finance director of a 500-person equipment manufacturer, to ask a small…
Beyond the AI Hype: Navigating Migration, Compression, and the Future of Engineering
Over the past year, my daily workflow as a developer has fundamentally shifted. I transitioned from writing code manually to prompting AI, developin…