▶ Videos →

📰 Dev.to · Bill Tu

20 articles · Updated every 3 hours · View all reads

All Articles 120,334 Blog Posts 127,266 Tech Tutorials 30,816 Research Papers 23,875 News 17,389 ⚡ AI Lessons

Why One Second Wasn't Enough: Adding Retry Logic to a Diagnostic Tool

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Why One Second Wasn't Enough: Adding Retry Logic to a Diagnostic Tool

For the first seven releases of node-loop-detective, connecting to a target process looked like...

Giving Kafka-Style Topics the Routing Power of RabbitMQ

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Giving Kafka-Style Topics the Routing Power of RabbitMQ

One of the most common complaints about Kafka is its routing model. You have topics. You have...

When the Patient Dies on the Table: Handling Target Process Exit During Profiling

Dev.to · Bill Tu ☁️ DevOps & Cloud ⚡ AI Lesson 3mo ago

When the Patient Dies on the Table: Handling Target Process Exit During Profiling

You're profiling a Node.js process that's been crashing intermittently. You attach loop-detective,...

Writing 89 Tests for a Quantitative Trading Framework: Strategy and Trade-offs

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Writing 89 Tests for a Quantitative Trading Framework: Strategy and Trade-offs

Adding a test suite to an existing codebase is a different exercise than writing tests alongside new...

Who Should Own the Order ID? Moving ID Generation Inside the Matching Engine

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Who Should Own the Order ID? Moving ID Generation Inside the Matching Engine

Order IDs seem trivial. Every order needs one, they need to be unique, and they show up in every...

Less Is More: Why We Added a Flag to Disable Our Best Feature

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Less Is More: Why We Added a Flag to Disable Our Best Feature

We spent three releases building async I/O tracking into node-loop-detective. HTTP request timing....

The Invisible Network Calls: Tracking fetch() and dns.promises in Node.js

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

The Invisible Network Calls: Tracking fetch() and dns.promises in Node.js

You've instrumented your Node.js app with I/O tracking. You're catching slow HTTP requests, slow...

From O(n log n) to O(log p): Rebuilding the Order Book for Performance

Dev.to · Bill Tu 🏗️ Systems Design & Architecture ⚡ AI Lesson 3mo ago

From O(n log n) to O(log p): Rebuilding the Order Book for Performance

When we first built MatchEngine, the order book used a sorted slice. Every time an order was...

Lessons from Fixing 8 Bugs in a Quantitative Trading Framework

Dev.to · Bill Tu 📐 ML Fundamentals ⚡ AI Lesson 3mo ago

Lessons from Fixing 8 Bugs in a Quantitative Trading Framework

QuantFlow is an open-source quantitative trading system written in Python. After the initial release,...

Four Bugs We Found in Our Node.js Rate Limiter (And How We Fixed Them)

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Four Bugs We Found in Our Node.js Rate Limiter (And How We Fixed Them)

We recently shipped node-rate-limiter-pro, a high-performance rate limiter for Node.js with Token...

Five Bugs That Would Have Killed TitanMQ in Production

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Five Bugs That Would Have Killed TitanMQ in Production

We recently ran a deep audit of TitanMQ's codebase and found five bugs that ranged from "data loss on...

Four Bugs That Would Break a Matching Engine in Production

Dev.to · Bill Tu 🏗️ Systems Design & Architecture ⚡ AI Lesson 3mo ago

Four Bugs That Would Break a Matching Engine in Production

MatchEngine is an open-source order matching engine written in Go. After the initial release, we...

Debugging Node.js in Docker and Kubernetes Without Restarting

Dev.to · Bill Tu ☁️ DevOps & Cloud ⚡ AI Lesson 3mo ago

Debugging Node.js in Docker and Kubernetes Without Restarting

There's a Node.js service running in a Kubernetes pod. It's slow. You need to figure out why. But you...

7 Bugs That Taught Us How to Build Better Diagnostic Tools

Dev.to · Bill Tu ☁️ DevOps & Cloud ⚡ AI Lesson 3mo ago

7 Bugs That Taught Us How to Build Better Diagnostic Tools

We shipped node-loop-detective v1.1.0 with a feature we were proud of: slow async I/O tracking. It...

Why We Replaced float64 With Decimal in Our Matching Engine

Dev.to · Bill Tu 📣 Digital Marketing & Growth ⚡ AI Lesson 3mo ago

Why We Replaced float64 With Decimal in Our Matching Engine

Every financial system eventually faces the same question: can we trust floating-point arithmetic...

Beyond the Event Loop: Tracking Slow I/O in Production Node.js

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Beyond the Event Loop: Tracking Slow I/O in Production Node.js

Your Node.js service is slow. You run a profiler. CPU usage is low. The event loop isn't blocked....

Detecting Event Loop Blocking in Production Node.js — Without Touching Your Code

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Detecting Event Loop Blocking in Production Node.js — Without Touching Your Code

You're on call. Alerts fire. Your Node.js service is responding slowly — or not at all. You suspect...

Building a Trade Matching Engine from Scratch in Go

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Building a Trade Matching Engine from Scratch in Go

Every exchange — whether it trades stocks, crypto, or commodities — has a matching engine at its...

Building QuantFlow: An Event-Driven Quantitative Trading Framework in Python

Dev.to · Bill Tu ⚡ AI Lesson 3mo ago

Building QuantFlow: An Event-Driven Quantitative Trading Framework in Python

Quantitative trading systems sit at the intersection of finance, statistics, and software...

Building a High-Performance Rate Limiter for Node.js: Architecture, Algorithms, and Benchmarks

Dev.to · Bill Tu 🔧 Backend Engineering ⚡ AI Lesson 3mo ago

Building a High-Performance Rate Limiter for Node.js: Architecture, Algorithms, and Benchmarks

Rate limiting is one of those things every production API needs but few teams get right. Most reach...