Optimistic concurrency is the whole design: event sourcing on Aurora DSQL
Quorum is an incident command plane built on Amazon Aurora DSQL. The failover story lives in another post. This one is about a narrower question that …
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Bulkhead Pattern - Go
Go Bulkhead Pattern — Complete Reference Table of Contents What is the Bulkhead Pattern Three Mechanisms HTTP Transport Parameters — Deep Dive Little'…
I Built a Consistent Hashing Ring in Pure Python and Finally Understood How Cassandra Distributes Data
I Built a Consistent Hashing Ring in Pure Python and Finally Understood How Cassandra Distributes Data I've been using Cassandra and Redis Cluster for…
Vertica vs VoltDB (Volt Active Data): Key Differences, Use Cases & How to Choose in 2026
If you're building a modern data stack that requires either high-throughput transaction processing or large-scale analytical workloads, you've likely …
Shipping 12,000+ Lines Across 6 Systems in 19 Days: A Masterclass in Backend Architecture.
What looked like a chaotic sprint was actually a strict exercise in architectural discipline. The last time I published on Dev.to was in late May. At …
I expected the cheaper model to be cheaper. It cost 8.6 more.
I'd routed the same one-word prompt to Claude Haiku and to Gemini 2.5 Flash. Flash has the lower per-token price, so this should have been an easy win…
System Design - 15. The Saga Pattern: How Uber Books a Trip Without a Single Database Transaction
Covers: Two-Phase Commit, Saga Pattern, Choreography vs Orchestration Sagas, Compensating Transactions, Idempotency The Question That Breaks Most Micr…
System Design - 14. Event-Driven Architecture: Event Sourcing, CQRS, and the Outbox Pattern Explained
Event-Driven Architecture: Event Sourcing, CQRS, and the Outbox Pattern Explained Covers: Event Sourcing, CQRS, Outbox Pattern, Choreography vs Orches…
System Design - 13. Message Queues Explained: Why LinkedIn Built Kafka and Changed Async Communication Forever
Message Queues Explained: Why LinkedIn Built Kafka and Changed Async Communication Forever Covers: Point-to-Point vs Pub-Sub, Kafka Internals, Deliver…
What Designing a Binary Protocol Actually Taught Me
Most developers never have to design a network protocol from scratch. You use HTTP, gRPC, WebSockets, or something else that already exists and has be…
I built a distributed compute grid where your idle laptop runs ML jobs — the orchestrator behind it
I built a distributed compute grid where your idle laptop runs ML jobs — the orchestrator behind it The pitch: a single FastAPI hub takes compute jobs…
Day 35/60 System Design Questions
This article was written with the assistance of AI tooling for structure and syntax. The concepts, tradeoffs, and production context are based on my o…
Multi-VPS Distributed n8n Cluster on Ubuntu 24.04 with an IPIP Tunnel
When running automation tools like n8n for personal or production workflows, you quickly run into resource walls if you stick to the default configura…
I built an autonomous SRE that lets an LLM diagnose incidents — but never touch a shell unsupervised
I built an autonomous SRE system where a local LLM diagnoses production incidents, proposes a fix, and a deterministic engine decides whether that fix…
Stop Guessing, Start Profiling: A Dev's Guide to Go Mechanics
The Problem: The Mysterious 2-Second Freeze Imagine your Go microservice is a chef in a busy kitchen. It processes orders (JSON payloads) super fast. …
OpenTelemetry Observability Guide: How to Optimize Metrics, Logs, and Traces at Scale
Introduction Modern cloud-native systems generate an enormous amount of telemetry data every second. Applications, containers, Kubernetes clusters, AP…
Why Consensus Defines Blockchain Performance Limits
Network performance is governed by consensus architecture rather than application-level optimization. One of the most common misconceptions about bloc…
Apache Kafka Explained: A Practical Beginner Guide for Data Engineers
If you're learning data engineering, you'll probably meet Apache Kafka very early. You'll see it in job descriptions, system design diagrams, real-tim…
Hashing in Distributed Systems: A Complete Guide to Algorithms, Best Practices, and Real-World Applications
Have you ever wondered how Discord keeps your channel messages available even when a server goes down? Or how Amazon DynamoDB serves petabytes of data…
Why Squirix uses a strict client/server architecture for a .NET distributed cache
Squirix 0.1.0 is an early preview of a .NET distributed cache. A typed client SDK talks to a remote server over gRPC; the server owns state, routing, …
Architecting Strict Sequential Ordering in a Concurrent World
Imagine you are building a cloud-native backend for a high-frequency trading platform or a core banking ledger. To ensure mathematical immutability an…
Hidden Coupling in Distributed Financial Systems: Dependencies You Didn't Know You Had
Abstract Distributed financial systems are described through explicit interfaces. Services call APIs, consume events, write to databases, submit trans…
Proof of Compute: The Receipt Is Not the Benchmark
Proof of Compute Disclosure: AI tools were used for source collection and editorial review. The article was written by a human author, who checked the…
Event-Driven Architecture: The Dual Write Problem and How to Solve It
You have a well-designed order service. It writes to the database and publishes an event to Kafka. Clean, decoupled, event-driven. Then Kafka has a br…
How Consistent Hashing Works
How Consistent Hashing Works in Distributed Systems: A Comprehensive Guide Imagine you're trying to organize a massive library with an infinite number…
How I Built a Real-Time Fraud Detection System That Handles 71,000 RPS at p95 <6ms
How I Built a Real-Time Fraud Detection System That Handles 71,000 RPS at p95 <6ms A deep dive into building Sentinel — an ML inference pipeline th…
Why Blockchain Performance Cannot Be Tuned as a Speed Layer
Blockchain performance is determined by consensus rules. There is no acceleration layer within the protocol. One of the most common misconceptions abo…
The 32-bit Hidden Countdown in ClickHouse Keeper: How an XID Overflow Gave Us Weekly Read-Only Bursts
A production debugging story: tracing recurring 2–5-second read-only storms on a ClickHouse cluster down to a single 32-bit integer — and the one-line…
From a Simple Auth Service to a Distributed Authentication Platform with Kafka, Debezium, and Observability
This is a submission for the GitHub Finish-Up-A-Thon Challenge What I Built I built a Distributed Authentication System as a long-term learning projec…
Design and Implementation of a Slurm-Based HPC Cluster
The Problem Managing a growing fleet of GPU and HPC servers one-by-one doesn't scale - here's how we fixed it. Our department has several computing re…