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Doogal Simpson

I'm a Senior Staff Engineer and former start-up founder. I'm trying to help developers bridge the gap from technical competence to professional engineering.

Joined Joined on  Personal website https://doogal.dev/page/links
Why QA Engineers Are Your Team's Invisible Safety Net
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Why QA Engineers Are Your Team's Invisible Safety Net

#softwareengineering #testing #qualityassurance #devops
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4 min read

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Handling Partial Failures in Distributed Systems
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Handling Partial Failures in Distributed Systems

#distributedsystems #softwareengineering #microservices #systemdesign
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3 min read
Stop Terminal Prompting: A Markdown-First AI Workflow
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Stop Terminal Prompting: A Markdown-First AI Workflow

#softwareengineering #developerproductivity #ai #programming
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3 min read
How to Build a Scale-Proof Distributed Counter
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How to Build a Scale-Proof Distributed Counter

#systemdesign #softwareengineering #backend #distributedsystems
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4 min read
Why AI Coding Can't Speed Up B2B Sales Cycles
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Why AI Coding Can't Speed Up B2B Sales Cycles

#softwareengineering #saas #ai #startup
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4 min read
Fix AI Agent Jargon with Simplified Technical English
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Fix AI Agent Jargon with Simplified Technical English

#softwareengineering #promptengineering #claudecode #developertools
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3 min read
How YouTube Scales Watch History Using Bigtable
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How YouTube Scales Watch History Using Bigtable

#systemdesign #nosql #database #softwareengineering
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4 min read
Why You Should Wait 3 Months for Open-Source AI
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Why You Should Wait 3 Months for Open-Source AI

#ai #opensource #softwareengineering #machinelearning
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3 min read
How AI Automates Fast Decisions in Software Engineering
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How AI Automates Fast Decisions in Software Engineering

#softwareengineering #ai #developerproductivity #systemdesign
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3 min read
Why Toxic Comments are a Systems Scaling Metric
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Why Toxic Comments are a Systems Scaling Metric

#softwareengineering #opensource #developerlife #systemdesign
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3 min read
Why Scaling Software Is an Organizational Problem
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Why Scaling Software Is an Organizational Problem

#softwareengineering #architecture #microservices #api
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3 min read
How Adaptive Bitrate Streaming Works
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How Adaptive Bitrate Streaming Works

#webdev #videostreaming #softwareengineering #systemdesign
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4 min read
How HyperLogLog Counts Billions of Views with 12KB RAM
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How HyperLogLog Counts Billions of Views with 12KB RAM

#systemdesign #computerscience #database #softwareengineering
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4 min read
TDD vs. Spike-Driven Development: When to Test First
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TDD vs. Spike-Driven Development: When to Test First

#softwareengineering #testdrivendevelopment #testing #programming
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3 min read
Managing AI Agents Like Junior Developers
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Managing AI Agents Like Junior Developers

#softwareengineering #ai #aiagents #management
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4 min read
Software Estimation: Why It Fails and How to Fix It
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Software Estimation: Why It Fails and How to Fix It

#softwareengineering #agile #scrum #projectmanagement
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4 min read
Graph Databases for Real-Time Fraud Detection
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Graph Databases for Real-Time Fraud Detection

#graphdatabases #nosql #softwareengineering #database
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4 min read
How Defensive UI Design Prevents Production Outages
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How Defensive UI Design Prevents Production Outages

#softwareengineering #devops #uxdesign #systemdesign
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4 min read
Why Exponential Math Breaks Software Scaling
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Why Exponential Math Breaks Software Scaling

#softwareengineering #systemdesign #mathematics #computerscience
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3 min read
AI Agent Architecture: Skills, Evals & Dark Factories
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AI Agent Architecture: Skills, Evals & Dark Factories

#softwareengineering #aiagents #aiengineering #devops
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4 min read
Premature Optimization: What Donald Knuth Actually Meant
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Premature Optimization: What Donald Knuth Actually Meant

#softwareengineering #architecture #systemdesign #programming
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4 min read
Why Software Engineers Prefer YYYY-MM-DD (ISO 8601)
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Why Software Engineers Prefer YYYY-MM-DD (ISO 8601)

#softwareengineering #programming #webdev #database
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4 min read
Is 100% Test Coverage Worth It? Realistic Testing Targets
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Is 100% Test Coverage Worth It? Realistic Testing Targets

#softwaretesting #codecoverage #softwareengineering #webdev
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3 min read
Why JavaScript Has Quirks (And Why TC39 Can't Fix Them)
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Why JavaScript Has Quirks (And Why TC39 Can't Fix Them)

#javascript #webdev #softwareengineering #programming
1
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4 min read
How to Prevent SQL Injection with Parameterized Queries
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How to Prevent SQL Injection with Parameterized Queries

#websecurity #databasesecurity #softwareengineering #backend
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4 min read
How to Prompt LLMs for Clean Code Using Trigger Words
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How to Prompt LLMs for Clean Code Using Trigger Words

#promptengineering #softwareengineering #webdev #ai
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3 min read
Why the Netflix Keeper Test Hurts Engineering Teams
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Why the Netflix Keeper Test Hurts Engineering Teams

#softwareengineering #engineeringmanagement #developerculture #techleadership
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4 min read
Why AI Agents Won't Replace Software Engineers
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Why AI Agents Won't Replace Software Engineers

#softwareengineering #systemdesign #aiagents #webdev
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4 min read
How the Luhn Algorithm Validates Credit Cards Instantly
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How the Luhn Algorithm Validates Credit Cards Instantly

#softwareengineering #webdev #algorithms #computerscience
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3 min read
How USB-C Power Negotiation Works: Inside the CC Pin
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How USB-C Power Negotiation Works: Inside the CC Pin

#hardware #electronics #usbpowerdelivery #engineering
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4 min read
The To-Do Method: Control AI Coding Agents in Your IDE
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The To-Do Method: Control AI Coding Agents in Your IDE

#softwareengineering #aicoding #developertools #productivity
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3 min read
Game Theory in Software Engineering: How Cooperation Wins
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Game Theory in Software Engineering: How Cooperation Wins

#softwareengineering #gametheory #technicalleadership #careergrowth
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4 min read
8 Levels of AI Autonomy in Software Engineering
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8 Levels of AI Autonomy in Software Engineering

#softwareengineering #ai #automation #devops
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4 min read
ETL vs ELT: Why Cheap Cloud Storage Changed Everything
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ETL vs ELT: Why Cheap Cloud Storage Changed Everything

#dataengineering #systemdesign #cloudcomputing #softwareengineering
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4 min read
How to Fix the Thundering Herd (Cache Stampede) Problem
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How to Fix the Thundering Herd (Cache Stampede) Problem

#systemdesign #caching #softwareengineering #backend
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3 min read
Automate Video Editing with Whisper, LLMs, and FFmpeg
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Automate Video Editing with Whisper, LLMs, and FFmpeg

#automation #softwareengineering #ai #ffmpeg
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3 min read
How Quorum Prevents Split-Brain in Distributed Systems
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How Quorum Prevents Split-Brain in Distributed Systems

#distributedsystems #systemdesign #database #softwareengineering
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4 min read
Why You Should Never Use a Database as an API
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Why You Should Never Use a Database as an API

#architecture #systemdesign #api #microservices
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4 min read
Should You Use Custom ID Types or Plain Strings?
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Should You Use Custom ID Types or Plain Strings?

#softwareengineering #cleancode #typesafety #programming
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4 min read
When to Use an ORM vs SQL and Query Builders
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When to Use an ORM vs SQL and Query Builders

#database #sql #webdev #softwareengineering
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3 min read
Solving the N+1 Query Problem in Databases and ORMs
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Solving the N+1 Query Problem in Databases and ORMs

#database #sql #softwareengineering #databaseperformance
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4 min read
How Collaborative Docs Work: An Introduction to CRDTs
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How Collaborative Docs Work: An Introduction to CRDTs

#systemdesign #distributedsystems #softwareengineering #crdt
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3 min read
Boost LLM Accuracy with Self-Correcting Agent Loops
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Boost LLM Accuracy with Self-Correcting Agent Loops

#llms #ai #softwareengineering #webdev
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3 min read
LLM vs. AI Agent: Understanding the Difference
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LLM vs. AI Agent: Understanding the Difference

#aiagents #llm #softwareengineering #ai
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4 min read
How TypeScript Makes Your JavaScript Run Faster
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How TypeScript Makes Your JavaScript Run Faster

#typescript #javascript #webdev #performance
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3 min read
How the V8 Engine Optimizes JavaScript at Runtime
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How the V8 Engine Optimizes JavaScript at Runtime

#javascript #v8engine #performance #softwareengineering
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4 min read
Conway's Law: How Team Structure Shapes Architecture
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Conway's Law: How Team Structure Shapes Architecture

#architecture #systemdesign #softwareengineering #techleadership
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4 min read
How Conway's Law Shapes Your Software Architecture
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How Conway's Law Shapes Your Software Architecture

#architecture #softwareengineering #conwayslaw #techleadership
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4 min read
Designing Idempotent APIs and Resilient Pipelines
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Designing Idempotent APIs and Resilient Pipelines

#systemdesign #api #softwareengineering #backenddevelopment
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4 min read
Idempotency Explained: Handling Duplicate API Requests
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Idempotency Explained: Handling Duplicate API Requests

#softwareengineering #apidesign #systemdesign #backenddevelopment
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4 min read
Why a Day Isn't 86,400 Seconds in Programming
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Why a Day Isn't 86,400 Seconds in Programming

#softwareengineering #programming #bestpractices #backend
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4 min read
A* Search Algorithm: Game Pathfinding Explained
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A* Search Algorithm: Game Pathfinding Explained

#algorithms #gamedev #computerscience #softwareengineering
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4 min read
Handling ISO Currency Codes in Software
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Handling ISO Currency Codes in Software

#softwareengineering #fintech #programming #webdev
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4 min read
How Git Uses Merkle Trees for Fast Verification
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How Git Uses Merkle Trees for Fast Verification

#git #softwareengineering #datastructures #versioncontrol
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4 min read
How Merkle Trees Verify Large Files
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How Merkle Trees Verify Large Files

#cryptography #datastructures #computerscience #softwareengineering
1
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4 min read
Storing Exchange Rates for Multi-Currency Systems
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Storing Exchange Rates for Multi-Currency Systems

#softwareengineering #architecture #databasedesign #ecommerce
1
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3 min read
Merkle Trees Explained: How We Verify Large Files
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Merkle Trees Explained: How We Verify Large Files

#softwareengineering #computerscience #datastructures #cryptography
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5 min read
Correct by Design vs Correct by Coincidence
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Correct by Design vs Correct by Coincidence

#softwareengineering #cleancode #refactoring #architecture
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3 min read
How to Represent Money in Software
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How to Represent Money in Software

#softwareengineering #architecture #programmingtips #computerscience
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3 min read
How DRAM Works: The 64ms Memory Refresh Cycle
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How DRAM Works: The 64ms Memory Refresh Cycle

#computerscience #hardware #computerarchitecture #softwareengineering
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4 min read
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