Freshness Watermarks Belong on Every Row, Not the README
The most common freshness design I see — in my own old code included — is a single stamp at the top: a README that says "last updated 2026-10-01", a…
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Using the Strangler Pattern to Add AI Around Legacy Systems Without Rewriting the Core
A legacy system can contain years of business rules, data relationships, and operational behavior that nobody wants to rediscover during a full rewr…
Horizontal Scaling Series — Part 1: MinIO and Shared Object Storage
When we horizontally scale an application, adding more instances is only part of the solution. We also need to consider where the application stores…
From Open Data to Coordinated Models: An Architecture-Level Review of Shapezo, MicroStation, ArchShaper, CityWeft, and HalfMaps
Tool comparisons usually describe features. Architects of software read them differently: what computes locally, what runs in the cloud, where the a…
Rate Limiting Like Gandalf: Building a Distributed Cache with Redis
The Quest Begins (The "Why") Ever had your API melt down because a sudden traffic spike hammered every endpoint at once? I remember a late‑night dep…
Indexing and Replication Through a Restaurant Example
Let's continue our café story, but now imagine the café has become a popular restaurant with thousands of customers, hundreds of menu items, and a l…
Why I Built an Interactive Sandbox to Learn Distributed Systems
When you first start studying system design and distributed systems, almost everything is taught through static boxes and arrows. Someone draws a Lo…
Designing Contextual Learning Recommendations for Language Learners
Recommendation systems in education should not optimize for clicks alone. A learner may enjoy a video without learning from it, complete many exerci…
How to Prevent Retry Storms in Microservices
Quick Answer: A retry storm occurs when deeply nested microservices independently retry failed downstream requests, causing exponential traffic ampl…
Separating Available, Held, Actual, and Displayed Balances
Why one balance field cannot represent every financial truth in a virtual-account product. “What is the balance?” sounds like a simple question unti…
Building an Asset Tracking System That Turns Events Into Actions published: true tags: architecture, iot, backend, systemdesign
Asset tracking sounds simple on paper: figure out what a thing is and where it is. Then you add a second location, a third device type, and a wareho…
A prototype AI agent can survive on a static CSV and a single Python script. A production agent cannot.
I recently completed the AI-Assisted Data Science with BigQuery lab via Google Cloud. While analyzing the final multimodal vector search stage, I fo…
Group Chat Orchestration: Why Eleven Agents Spent Forty Minutes Debating a Research Summary
Group chat orchestration is the default pattern for multi-agent systems. It mirrors how human teams work: agents share a conversation, a moderator p…
How to Build Transportation Management Solutions Around Real-Time Inventory Events
A warehouse can show 500 units available while the transportation system is still waiting for the previous stock update. That inconsistency can caus…
Building a Real-Time Notification System at Scale: The Gandalf Approach
The Quest Begins (The "Why") I still remember the first time our notification service started to feel like a dragon hoarding gold. We were pushing o…
I built a system design app that teaches why and helps you in interviews
SysDesign Studio is an open-source, interactive way to practice system design interviews. Evolve architectures step by step, trace failure paths, an…
ForgeZero and Gloria: Build Tooling for People Who Still Want to Know What Their CPU Is Doing
I'm Alex Voste, the person behind ForgeZero and its resident experimental language, Gloria. I'm not going to open with a mission statement. I'm goin…
Designing Explicit State Machines for Money Movement
Turning scattered status updates into enforceable payment lifecycle rules. Payment systems often begin with a status column and a few convenient val…
What Really Happens When You Upload a File to the Cloud?
You select a file on your computer, open Google Drive, Dropbox, OneDrive, or another cloud storage service, and click Upload . A progress bar appear…
How HuskHoard Talks to the Cloud (and Why It Beats Managing Buckets by Hand)
A question we keep getting from people trying HuskHoard for the first time is some version of: "So it archives to S3... but how is that different fr…
Just Add More Database Connections Is a System Design Trap
During system design interviews or production firefighting sessions, a common piece of logic always resurfaces: "If our Hibernate threads are starvi…
Retry Storms: How a 502 Fix Created a Thousand Duplicate Orders
Retry Storms: How a 502 Fix Created a Thousand Duplicate Orders In modern distributed systems, transient failures are inevitable. Timeouts, circuit…
Redis: More Than a Cache, Building Event-Driven Systems with Redis Streams
Yes you heard it right. Redis is more than a cache, if you've probably heard of Redis before, you may have implemented it as a distributed cache, bu…
System Design: How to Build a Networking Library Like Retrofit or OkHttp
System Design: How to Build a Networking Library Like Retrofit or OkHttp Networking is one of the most important infrastructure layers in a modern A…
Android System Design: A Complete Guide for Android Developers
Android System Design: A Complete Guide for Android Developers Modern Android development is no longer only about creating screens and connecting AP…
So... What Actually Happens Inside the Database?
So... What Actually Happens Inside the Database? In my last article, I was trying to figure out how to approach a system design problem without imme…
Sentinel: The Watchdog and Derived Points
A door sensor that only reports when the door opens or closes can go months without sending anything. If nothing has happened, that silence is corre…
Caching from Zero to Production
Every backend eventually hits the same wall: the database cannot keep up, but the data barely changes. That is the moment caching stops being an opt…
Durable Actor Session Protocol: How DASP Solves State Persistence for Long-Running Agent Conversations
Most agent frameworks treat sessions as ephemeral. You refresh the page, the conversation dies. You restart the process, the context vanishes. DASP…
How to Build an AI-Ready Customer Profile
Connecting an AI application to a CRM or a customer data warehouse is relatively easy. The harder part is deciding what the AI should actually recei…