Content Library
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Multi-Region Active-Active on AWS: What It Actually Costs You
- Cloud Architecture
- Disaster Recovery
- 08 Sept 2026
- 12 Mins read
Surviving a full regional outage with no downtime is the thing every architecture review eventually asks about, and the answer is usually more expensive than the person asking expects. In a multi-regi
Bun vs. Node.js in Production: A Real-World Performance and Compatibility Breakdown
- Backend Development
- Software Engineering
- 26 Aug 2026
- 09 Mins read
The server-side JavaScript world in 2026 is comfortable with having more than one good option. Node.js has been the reliable workhorse for over a decade: stable, heavily tested, and predictable. Bun c
Kubernetes Health Probes: Building Self-Healing Applications
- Kubernetes
- Site Reliability Engineering
- 15 Aug 2026
- 08 Mins read
Kubernetes has a reputation for keeping applications online, but it is not magic. Out of the box, the cluster is blind to what happens inside your container. If your application deadlocks or exhausts
Upload Files to AWS S3 with Pre-Signed URLs in Node.js
Routing file uploads through your API server is the default that nobody questions, and it is usually the wrong one. The bytes travel to your compute, sit in memory or a temp file, then travel again to
Python Dataclass Patterns: Slots, Frozen Instances, and Field Validation
Quick Tip Reach for @dataclass(slots=True, frozen=True) with a post_init check and you get a small, immutable, validated value object in about five lines. The Problem The problem
Bash Script Locking: Prevent Concurrent Runs with a PID File
- Bash
- Automation
- 18 Aug 2026
- 03 Mins read
Quick Tip Wrap any script that must not run twice at once in a PID-file lock, and a second copy simply exits instead of corrupting your data. The Problem The Problem Cron does not c
Hardening a CI/CD Supply Chain to SLSA Level 3
The question that started this was from an auditor, and it was a fair one: can you prove that the container running in production is the one your pipeline built from the commit you think it was? We ha
Taming a 3am Pager: SLOs and Error Budgets That Stuck
- Reliability
- DevOps
- 29 Aug 2026
- 07 Mins read
A platform team was losing people to burnout, and the cause was the pager. On-call meant a phone that went off day and night with alerts about CPU, memory, and pod restarts, the overwhelming majority
Multi-Region Active-Active for a Payments API
- Architecture
- Cloud Computing
- 16 Aug 2026
- 06 Mins read
A payments API that moves real money had been running comfortably in a single AWS region for years. It was reliable until the day it was not: a regional control-plane incident took the whole service o
Speeding Up CI Pipelines: Caching, Parallelism, and Skipping Unnecessary Work
A slow pipeline does not just waste compute. It changes behaviour. Once feedback takes longer than about ten minutes, people stop waiting for it. They context-switch, batch up changes into bigger pull
Kubernetes Ingress Controllers Explained: Nginx, Traefik, and AWS ALB Compared
- Kubernetes & Containers
- 01 Sept 2026
- 03 Mins read
Why the ingress controller you pick matters Hey, want your cluster to actually serve traffic? Kubernetes gives you the Ingress API, a way to declare "route this host and path to that service.
Terraform Workspaces vs. Directory-Based Environments: What Actually Scales
- Cloud & Infrastructure Automation
- 19 Aug 2026
- 03 Mins read
Why this choice matters Hey, want to stop sweating every prod apply? The way you split dev, staging, and prod in Terraform decides how much damage a single mistake can do. Get it right and a
AWS Advanced Networking Specialty Flashcards (ANS-C01)
- Aws
- 40 Cards
- ~17 min
- 15 Sept 2026
The ANS-C01 is the AWS exam least forgiving of vocabulary-only knowledge. Most questions describe a working topology, break one thing, and ask which of four plausible components is responsible. Knowin
Linux Foundation Certified System Administrator Flashcards (LFCS)
- Linux
- Certification
- 32 Cards
- ~13 min
- 02 Sept 2026
Spaced-repetition deck for the LFCS exam: essential commands, users and groups, storage, networking, services, and security.
Docker and Container Fundamentals Flashcards
- Containers
- DevOps
- 41 Cards
- ~17 min
- 22 Aug 2026
A spaced-repetition deck covering images, containers, Dockerfiles, volumes, networking, Compose, and registries.
Databases & SQL
- Databases
- 38 Terms
- 16 Sept 2026
Most confusion about SQL is vocabulary rather than syntax. People know how to write a join and still get caught by a LEFT JOIN that quietly behaves like an INNER JOIN, because nobody explained that a
Observability & Monitoring
- Devops
- 35 Terms
- 05 Sept 2026
A quick-reference glossary for making sense of system health: the three pillars (metrics, logs, traces), the reliability vocabulary (SLI, SLO, error budget, burn rate), how good alerting works, and th
CI/CD & Automation
- Devops
- 35 Terms
- 23 Aug 2026
A quick-reference glossary of the terms you meet when automating builds, tests, and deployments: pipeline anatomy, test gates, and release strategies like canary and blue-green.
Ruby on Rails: Convention Over Configuration
- Ruby
- Web development
- 20 Questions
- ~5 min
- 19 Sept 2026
- Level: Intermediate
Rails is productive because it decided things for you. The router derives a controller and action from a verb and a path, the controller infers its template from its own name, and Active Record infers
PHP & Laravel: Modern Web Development Fundamentals
Ready to check how well you know PHP and Laravel? This quiz runs through routing and middleware, Eloquent relationships and the N+1 trap, migrations and seeders, Blade, and the artisan workflow. Read
C# & .NET: Language and Runtime Fundamentals
Ready to test how well you know C# and the .NET runtime? This quiz walks through the type system, LINQ, async/await, the CLR and garbage collection, and modern features like records and pattern matchi
Node.js Developer Beginner to Expert
- Backend development
- All Levels
- 13 Stages
- 31 Topics
- 07 Sept 2026
Node.js Developer Beginner to Expert This roadmap takes you from JavaScript foundations and the event loop through building APIs, working with databases, streams, testing, and security, and on to r
React Developer Beginner to Expert
- Web development
- All Levels
- 13 Stages
- 31 Topics
- 25 Aug 2026
React Developer Beginner to Expert This roadmap takes you from JavaScript prerequisites through JSX, hooks, and state management, and on to data fetching, meta-frameworks, performance, and testing.
Full-Stack Developer Beginner to Expert
- Web development
- All Levels
- 18 Stages
- 50 Topics
- 12 Aug 2026
Full-Stack Developer Beginner to Expert This roadmap walks you from your first web page to shipping and operating a complete production application. Work the stages in order. Build the frontend fun