Programming Puzzle Solutions: JS, Java, Python, Go
This is the index for the four programming puzzle problems on this site. Each one has language-specific solutions in JavaScript, Java, Python, or Go — …
Read Article →Technical Articles
In-depth guides, insights, and best practices for modern software engineering
Karpenter v1 vs Cluster Autoscaler: A Production Migration Story
I’d been running Cluster Autoscaler on our production EKS cluster for years. It worked. It wasn’t exciting, it wasn’t cheap, but it …
Read Article →Longest Alphabetical Substring (JS)
The challenge
Find the longest substring of a string where characters appear in non-decreasing alphabetical order. If two substrings share the maximum …
Read Article →Longest Alphabetical Substring in Java
The challenge
Find the longest substring of a string where characters are in non-decreasing alphabetical order. If multiple substrings share the …
Read Article →Longest Vowel Substring in JS
The challenge
Given a lowercase string of letters (no spaces, no digits), return the length of the longest substring made only of vowels (aeiou). …
Longest Vowel Substring in Python
The challenge
Given a lowercase string of letters (no spaces, no digits), return the length of the longest substring that contains only vowels (aeiou …
Permutations Alphabetically in JS
The challenge
Given a lowercase word, return every permutation of its letters in alphabetical order. Do not use built-in permutation libraries. …
Read Article →Permutations Alphabetically (Java)
The challenge
Given a word (a string of lowercase letters), return all its permutations in alphabetical order. Do not use built-in permutation …
Read Article →Find Number With Most Digits in Go
The challenge
Given a slice of positive integers, return the value with the most digits. If two or more values share the highest digit count, return …
Read Article →Find Number With Most Digits in Java
The challenge
Given an array of positive integers, return the number with the most digits. If two or more numbers share the highest digit count, …
Read Article →Find Number With Most Digits in JS
The challenge
Given an array of positive integers, return the number with the most digits. If two numbers have the same number of digits, return the …
Read Article →AWS Organizations and Control Tower: Multi-Account Strategy
Single-account AWS is a ticking time bomb. I don’t say that lightly. I’ve watched it blow up firsthand, and I’ve spent more hours …
Read Article →Kubernetes eBPF: Next-Generation Observability and Security
eBPF is the biggest shift in Linux observability since strace. I don’t say that lightly. I’ve spent years wiring up monitoring stacks, …
Read Article →DevSecOps Pipeline: Integrating Security into Every Stage
Security as a gate at the end of the pipeline is security theater. I’ve believed this for years, but it took watching a real incident unfold to …
Read Article →Rust Async Runtime Deep Dive: Tokio Architecture
Tokio is Rust’s killer app for network services. I don’t say that lightly. After spending years building concurrent systems in Go and …
Read Article →Chaos Engineering on AWS: Fault Injection Simulator Guide
You don’t know your system is resilient until you’ve broken it on purpose.
I believed our payment processing service was fault tolerant. …
Read Article →Python Data Pipelines with Polars and DuckDB
I’m going to say something that’ll upset a lot of people: pandas had its run. Polars is just better.
I don’t mean that lightly. I …
Read Article →Why I Built Wyn: A Programming Language That Compiles to C
I’ve spent years writing Python for DevOps tooling and Go for services. Python is a joy to write but painfully slow for anything compute-heavy. …
Read Article →Kubernetes Gateway API: The Future of Ingress
Gateway API is what Ingress should have been from day one.
I don’t say that lightly. I’ve spent years wrangling Kubernetes Ingress …
Read Article →AWS Bedrock: Building AI Applications with Foundation Models
Bedrock is AWS finally getting AI right. I don’t say that lightly. I’ve watched AWS stumble through SageMaker’s complexity, watched …
Read Article →Infrastructure Drift Detection and Remediation
If you’re not running scheduled terraform plan, you have drift. You just don’t know it yet.
I learned this the hard way. A colleague made …
Read Article →AWS Architecture Guide: Production Patterns and Best Practices
Everything I’ve learned building on AWS since 2012, organized by domain.
Serverless
Read Article →Kubernetes Guide: From Basics to Production Operations
This is the hub for everything I’ve written about Kubernetes. Whether you’re setting up your first cluster or optimizing a multi-tenant …
Read Article →Kubernetes Multi-Cluster Management with Fleet and Rancher
I’ve been running Kubernetes in production for years now, and there’s a specific kind of pain that only hits you once you cross the …
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