Solving programming problems in multiple languages to master syntax, data structures, and algorithms.

LeetCode: 743. Network Delay Time

LeetCode: 322. Coin Change

LeetCode: 217. Contains Duplicate

LeetCode: 200. Number of Islands

Solving Leetcode problems to syntax of multiple languages and data structures & algorithms.

LeetCode: 121. Best Time to Buy and Sell Stock

LeetCode: 70. Climbing Stairs

LeetCode: 16. 3Sum Closest

LeetCode: 1. Two Sum

How to install a virtual machine on an M1 Mac/ARM64 machine

Guide: Virtual Machines(VM) on ARM64 MacOS

Learn how to set up and connect to Google Cloud Memory Store (Redis) from Cloud Run using a VPC connector.

System Design: Getting Started with Google Cloud Memory Store (Redis)

Learn what GCP VPC Connectors are, why they matter, and how to use them to enable secure private networking for your serverless applications.

System Design: Understanding Google Cloud VPC Connectors

Learn what Google Cloud Secret Manager is, its benefits, and how to securely manage secrets for your applications in GCP.

System Design: Google Cloud Secret Manager

Explore the pros and cons of three popular approaches for scheduling and running background jobs in Google Cloud: App Schedulers, Cloud Scheduler, and Cloud Run Jobs.

System Design: Comparing Background Job Techniques in GCP: App Schedulers, Cloud Scheduler, and Cloud Run Jobs

Learn what Google Cloud Scheduler is, its benefits, and how to set up a scheduled job in Google Cloud.

System Design: Getting Started with Google Cloud Scheduler

Learn how Cloud Build Triggers automate CI/CD workflows in Google Cloud, enabling automatic builds and deployments for your applications.

System Design: Automating Deployments with Google Cloud Build Triggers

Learn what Google Cloud Run is, its benefits, and how to deploy containerized applications with ease.

System Design: Getting Started with Google Cloud Run: Serverless Containers Made Easy

Options aren’t just speculative bets—they serve as insurance, income generators, leverage tools, and volatility plays. Finance experts use them to reshape risk-reward profiles, hedge portfolios, and engineer custom exposures that traditional assets alone can’t provide.

Finance: Options in the Expert’s Toolbelt

AI-driven vibe coding makes simple apps effortless, but when projects demand nuance, it turns into a frustrating cycle of fixing one issue only for another to pop up.

Opinion: Vibe Coding Without Coders... AKA Whack-a-Mole

AI expands knowledge like a fractal—each layer of clarity reveals new noise, trapping us in a recursive race to find true signal.

Opinion: AI as a Fractal: Signal, Noise, and Recursive Nature of Progress

Step-by-step guide to cloning tables or data from one remote PostgreSQL database to another using pg_dump and psql.

How Do I Clone a Remote PostgreSQL Database to Another Remote Database?

Step-by-step guide to dumping a remote PostgreSQL database or schema and restoring it to a local database using pg_dump and pg_restore.

How Do I Dump and Restore a Remote PostgreSQL Database to a Local Database?

A practical guide to understanding GraphQL in system design — how it compares to REST, when to use it, and the key concepts behind building flexible and efficient APIs.

System Design: GraphQL Crash Course

A concise reference of key numbers every engineer should know for system design interviews and rough capacity estimations — from latency benchmarks to storage calculations.

System Design: Must-Know Numbers

Agents, state spaces, goal tests, path costs & more

AI Search Agents for 15 Puzzle & Maze Path Finding

🚀 A single tool to replace pip, pip-tools, pipx, poetry, pyenv, twine, virtualenv, and more.

UV: Package Manager

Restarting a server to see changes reflected call kill velocity when working. Enable Hot Reloading to see changes to the app reflected from your code without the need for a server Restart

How to enable hot reloading in Flask?

Create an auditing system for enterprise applications which tracks user requests, resources touched & action taken. Reuse logic by leveraging hooks so that code is clean & concise. By utilizing middlewares, events & closures we're able to capture the details of requests on all our resources without duplicating code.

System Design: Build a auditing solution for collecting metadata on users of your system.

Decouple, distribute, and scale: A message queue lets your app handle tasks asynchronously, improving performance, reliability, and system flexibility.

System Design: Build a Message Queue

How to add Light/Dark mode to a Flutter application quick and easy using Flutter's built in Provider & Notification modules. Allow users to change the app's theme as well

System Design: Add Dynamic Themes & Light/Dark Mode in Flutter using Provider & Notify Listeners

How you approach complicated problems or systems. A strong answer emphasizes breaking problems into smaller parts, prioritizing tasks, simplifying patterns, collaborating with others, and iterating solutions step by step.

Question: How do I deal with complexity?

Explore your leadership style. A strong answer highlights guiding a team by setting clear goals, communicating effectively, supporting and mentoring team members, making informed decisions, and fostering collaboration and accountability.

Question: How do I lead?

A concise guide to the essential principles of system design, covering scalability, reliability, maintainability, availability, and trade-offs. This post introduces the core building blocks you need to design robust, efficient, and scalable systems—crucial knowledge for system design interviews.

System Design: Bit.ly

A distributed system is a collection of independent computers that appear to the users as a single coherent system. The key goal is to achieve scalability, fault tolerance, and high availability while maintaining consistency and performance.

System Design: Distributed Systems

System Design: Core Concepts

Manually repeating these tests is costly and time consuming. Once created, automated tests can be run over and over again at no additional cost and they are much faster than manual tests. Automated software testing can reduce the time to run repetitive tests from days to hours.

System Design: Automated Integration Testing with Appium & Mocha

Reasons why Flutter is my framework of choice over React Native for developing cross-platform apps on desktop, mobile, & web.

Opinion: Flutter vs React Native: Why I choose Flutter before React Native

Usually an easy process but not always. With Flutter & Firebase logging hasn't been straight forward. The steps I've taken and the behavior I'm observing logging the duration of rootBundle.load() to Firebase.

Logging app load times with Firebase

Learn how to use Git pre-commit hooks to automatically run checks or scripts before committing code, with practical examples using shell and Husky.

Guide: Git Pre-Commit Hooks Explained with Examples

Learn how to rebase in Git with step-by-step examples. Understand the difference between merge and rebase, and how to resolve conflicts when rebasing.

How to Rebase in Git (With Examples)

How to setup SQL Server using Azure SQL Edge docker image and check its working correctly. Snippets of TSQL

System Design: SQL Server setup using Azure SQL Edge Docker image

A list of the necessary skills to qualify as a mobile develop in a framework

Guide: Fundamental Mobile Developer Skills

When we want to commit part of a file to git we can!

Guide: How to stage part of a dirty file

.NET commands & shortcuts to get you up and running quick & easy.

Cheatsheet: .NET

Data Structures & Algorithms in Python

Building a Duolingo/Quizlet/Leetcode/TikTok side project because I thought these apps were all awesome and wanted to combine attributes of each one of them into a single learning platform.

Project: Semantic Stoic

Python: Useful Heap Methods

How to create a function which has access to variables defined outside its block scope

How to create a closure in Ruby

Requirements for setting up Java working environment using VSCode

Setup Java & Spring Boot

Containerize multiple services using Docker for cloud deployment. Using NPM, ExpressJS, NodeJS, and Docker we create two microservices that work together to create a web app which help users learn about the wizards of Hogwarts.

System Design: Containerization of Microservices using Docker

A review of dynamic programming and the techniques used to implement it including Brute Force, Top Down Memoization, & Bottom Up Tabulation.

Algorithms: Dynamic Programming

How to implement a custom Hash Table, analogous to a dict, using simpler data types & a hash function.

Data Structures & Algorithms: How to create a Hash Table?

Concurrency is the ability of program to handle multiple tasks simultaneously. Go uses go routines to achieve this, also known as concurrency.

What is concurrency in Go?

Multi platform frameworks like Flutter means we can build web versions of our app simultaneously with mobile. Use Netlify to reach users on the web at the same time as iOS & Android by adding a few configurations and leveraging it's CI/CD pipeline to have web builds in no time.

System Design: Flutter Web App Production Deployment with Netlify

The steps I would take to clone TikTok using Flutter. Including project structure, navigation, code snippets & more.

Project: How to build TikTok with Flutter? Part 2

Project: How to build TikTok with Flutter? Part 1

One of the most famous algorithms in the field of graph theory. Useful when finding the shortest paths between nodes in a weighted graph.

Algorithms: Dijkstra's Algorithm

Big O Notation's common complexity cases to familiarize oneself with.

Cheat Sheet: Big O Notation

The principles which guide object oriented programming

Object Oriented Programming

Platform specific solution for Android connectivity issues while developing with Flutter.

Flutter - Android app connection refused to local server when iOS & web work

Change icon name based on build helping to identify which app is installed on our device quick & easy.

How to change Android app icon name programmatically based on the build type?

Seeding database records for our clients, understanding our records data types, and validating/designing relationships between resources.

Project: Royal Stock Exchange(RSE) - Flutter Time Series with Sync Fusion Charts - Part 5

10,000 ft overview on how we plan to scale to our first 1,000,000 concurrent users

Project: Royal Stock Exchange(RSE) - How to Scale Our System to Millions? - Part 4

Basic functionality of a stock exchange including Carousel Ticker, Line & Candlestick Charts, Portfolio page/screen & more.

Project: Royal Stock Exchange(RSE) - First "Demo-able" Work - Part 3

Project: Royal Stock Exchange(RSE) - Seeding Stock Market data in SQL - Part 2

Build a stock exchange with .NET, Entity Framework, Flutter, Azure & more. Write backend code in C# & frontend using Flutter

Project: Royal Stock Exchange(RSE). Building a Full Stack Stock Exchange - Part 1

An overview of data structures used to solve more complex problems in the field of computer science.

Data Structures: A Quick Reference

Patterns often used to solve Graph problems

Data Structures & Algorithms: Patterns of Graph Problems

Developing a better intuition on pointers & references.

Data Structures: Pointers in C

Commonly used sorting algorithms & their corresponding Big Os. Develop a better intuition on DSAs by examining canonical sorting algorithms in Python.

Algorithms: Bubble Sort, Selection Sort, Insertion Sort, & Merge Sort

Master MongoDB’s CLI with these essential commands for exploring databases, managing collections, and running queries like a pro.

Top 10 MongoDB CLI Commands Every Developer Should Know

Expo commands to get you up and running quick & easy.

Cheat Sheet: Expo

Jetbrains commands/shortcuts to get you up and running quick & easy within their family of IDEs including DataGrip, RubyMine, PyCharm, PhpStorm, IntelliJ & more

Cheat Sheet: Jetbrains commands/shortcuts

Kubernetes commands to get you up and running quick & easy.

Cheat Sheet: Kubernetes commands/shortcuts

VIM commands to get you up and running quick & easy.

Cheat Sheet: VIM commands/shortcuts

VSCode commands to get you up and running quick & easy.

Cheat Sheet: VSCode commands/shortcuts

Create a DB Cluster which ensures high availability & fast responses with the use of a read Replica. Use Docker & Postgres to create a local database cluster where 1 DB is a master which we write to and 1 DB is a replica which copies data for higher availability & resiliency.

System Design: Build a Database Cluster with Primary(Master) & Read Replica(Slave)

Implement a server-side cache for faster and scalable systems. Caching results to DB queries can speed up server responses & by not overloading our DB with duplicate queries.

System Design: Build a Server Side Cache

Create a RESTful web api using Flask, a micro web framework written in Python. Serve data to client side apps using REST & minimal setup thanks to the robust & simple Flask framework.

System Design: Build a Backend API with Flask

Allows behavior to be dynamically added to individual objects without modifying their code, promoting flexibility and adherence to the open/closed principle.

Design Patterns: Decorator

Provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created, promoting flexibility and reusability in object creation.

Design Patterns: Factory

Defines a one-to-many dependency between objects, so when one object changes state, all its dependents are notified and updated automatically.

Design Patterns: Observer

Encapsulates the logic for accessing and managing data sources, providing a centralized interface for data operations while promoting separation of concerns and improving testability.

Design Patterns: Repository

Ensures a class has only one instance, providing a single point of access for shared resources like logging, configuration, or database connections.

Design Patterns: Singleton

Walkthrough of each level of Over the Wire's Natas series. Its a game which helps players master web server vulnerabilities testing

Guide: Over The Wire - Natas

Works with more advanced Linux concepts and privilege escalation. Walkthrough of each level of Over the Wire's Leviathan series. Its a CLI game which helps players master Linux, SSH, and much more.

Guide: Over The Wire - Leviathan

Focuses on basic Linux command-line and file manipulation skills. Walkthrough of each level of Over the Wire's the Bandit series. It's a CLI game which helps players master Linux, SSH, and much more.

Guide: Over The Wire - Bandit

Cross-Site Request Forgery (CSRF) is a web vulnerability where attackers trick users into submitting unwanted actions on a web application where they are authenticated. This guide explains how CSRF works, the risks it poses, and how to protect your applications using strategies like anti-CSRF tokens and same-site cookies.

Understanding CSRF: How Cross-Site Request Forgery Attacks Work

OverTheWire is an online platform that hosts a collection of war-games designed to teach security concepts, Linux command-line skills, and basic hacking techniques in a hands-on way. The games are structured to progressively increase in difficulty, helping users learn and practice:

Introduction: Over the Wire

Cross-Site Scripting (XSS) is a common web vulnerability where attackers inject malicious scripts into trusted websites. This guide explains how XSS works, particularly stored XSS, and how attackers can steal user data by tricking the browser into executing malicious code.

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